Translate exceptions in filters to Liquid::FilterError errors.

Make liquid error rendering optional.

.rubocop.yml

@@ -0,0 +1,92 @@
+inherit_from: ./.rubocop_todo.yml
+
+AllCops:
+  Exclude:
+    - 'performance/shopify/*'
+
+Lint/AssignmentInCondition:
+  Enabled: false
+
+Lint/UnusedBlockArgument:
+  Enabled: false
+
+Lint/EndAlignment:
+  AlignWith: variable
+
+Style/SingleLineBlockParams:
+  Enabled: false
+
+Style/StringLiteralsInInterpolation:
+  Enabled: false
+
+Style/SignalException:
+  Enabled: false
+
+Style/StringLiterals:
+  Enabled: false
+
+Style/BracesAroundHashParameters:
+  Enabled: false
+
+Style/NumericLiterals:
+  Enabled: false
+
+Style/SpaceInsideBrackets:
+  Enabled: false
+
+Style/SpaceBeforeBlockBraces:
+  Enabled: false
+
+Style/Documentation:
+  Enabled: false
+
+Style/ClassAndModuleChildren:
+  Enabled: false
+
+Style/TrailingComma:
+  Enabled: false
+
+Style/IndentHash:
+  EnforcedStyle: consistent
+
+Style/FormatString:
+  Enabled: false
+
+Style/AlignParameters:
+  EnforcedStyle: with_fixed_indentation
+
+Style/MultilineOperationIndentation:
+  EnforcedStyle: indented
+
+Style/IfUnlessModifier:
+  Enabled: false
+
+Style/RaiseArgs:
+  Enabled: false
+
+Style/DeprecatedHashMethods:
+  Enabled: false
+
+Style/RegexpLiteral:
+  Enabled: false
+
+Style/SymbolLiteral:
+  Enabled: false
+
+Performance/Count:
+  Enabled: false
+
+Style/ConstantName:
+  Enabled: false
+
+Style/CaseIndentation:
+  Enabled: false
+
+Style/ClassVars:
+  Enabled: false
+
+Style/PerlBackrefs:
+  Enabled: false
+
+Style/WordArray:
+  Enabled: false

.rubocop_todo.yml

@@ -0,0 +1,142 @@
+# This configuration was generated by `rubocop --auto-gen-config`
+# on 2015-05-13 19:54:01 +0000 using RuboCop version 0.31.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 2
+Lint/AmbiguousOperator:
+  Enabled: false
+
+# Offense count: 2
+Lint/AmbiguousRegexpLiteral:
+  Enabled: false
+
+# Offense count: 1
+Lint/Eval:
+  Enabled: false
+
+# Offense count: 4
+Lint/ParenthesesAsGroupedExpression:
+  Enabled: false
+
+# Offense count: 3
+# Cop supports --auto-correct.
+Lint/UnusedMethodArgument:
+  Enabled: false
+
+# Offense count: 1
+Lint/UselessAccessModifier:
+  Enabled: false
+
+# Offense count: 6
+Lint/UselessAssignment:
+  Enabled: false
+
+# Offense count: 51
+Metrics/AbcSize:
+  Max: 59
+
+# Offense count: 2
+Metrics/BlockNesting:
+  Max: 6
+
+# Offense count: 16
+# Configuration parameters: CountComments.
+Metrics/ClassLength:
+  Max: 304
+
+# Offense count: 10
+Metrics/CyclomaticComplexity:
+  Max: 15
+
+# Offense count: 547
+# Configuration parameters: AllowURI, URISchemes.
+Metrics/LineLength:
+  Max: 294
+
+# Offense count: 76
+# Configuration parameters: CountComments.
+Metrics/MethodLength:
+  Max: 46
+
+# Offense count: 1
+# Configuration parameters: CountComments.
+Metrics/ModuleLength:
+  Max: 216
+
+# Offense count: 6
+Metrics/PerceivedComplexity:
+  Max: 13
+
+# Offense count: 1
+Style/AccessorMethodName:
+  Enabled: false
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/AndOr:
+  Enabled: false
+
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles, ProceduralMethods, FunctionalMethods, IgnoredMethods.
+Style/BlockDelimiters:
+  Enabled: false
+
+# Offense count: 1
+Style/DoubleNegation:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/EmptyLinesAroundClassBody:
+  Enabled: false
+
+# Offense count: 2
+# Configuration parameters: MinBodyLength.
+Style/GuardClause:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, SupportedStyles, UseHashRocketsWithSymbolValues.
+Style/HashSyntax:
+  Enabled: false
+
+# Offense count: 13
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/MethodName:
+  Enabled: false
+
+# Offense count: 1
+Style/MultilineBlockChain:
+  Enabled: false
+
+# Offense count: 3
+# Configuration parameters: EnforcedStyle, MinBodyLength, SupportedStyles.
+Style/Next:
+  Enabled: false
+
+# Offense count: 3
+# Configuration parameters: NamePrefix, NamePrefixBlacklist.
+Style/PredicateName:
+  Enabled: false
+
+# Offense count: 1
+Style/RescueModifier:
+  Enabled: false
+
+# Offense count: 7
+# Cop supports --auto-correct.
+# Configuration parameters: AllowAsExpressionSeparator.
+Style/Semicolon:
+  Enabled: false
+
+# Offense count: 3
+# Cop supports --auto-correct.
+Style/SpecialGlobalVars:
+  Enabled: false

.travis.yml

@@ -1,13 +1,17 @@
+language: ruby
+
 rvm:
-  - 1.9
   - 2.0
   - 2.1
-  - jruby-19mode
+  - 2.2
+  - ruby-head
   - jruby-head
   - rbx-2
+
+sudo: false
+
 matrix:
   allow_failures:
-    - rvm: rbx-2
     - rvm: jruby-head
 
 script: "rake test"

Gemfile

@@ -6,4 +6,5 @@ gem 'stackprof', platforms: :mri_21
 group :test do
   gem 'spy', '0.4.1'
   gem 'benchmark-ips'
+  gem 'rubocop'
 end

History.md

@@ -1,45 +1,74 @@
-# Liquid Version History
+# Liquid Change Log
 
-## 3.0.0 / not yet released / branch "master"
+## 4.0.0 / not yet released / branch "master"
 
-* ...
-* Fixed condition with wrong data types, see #423 [Bogdan Gusiev]
-* Add url_encode to standard filters, see #421 [Derrick Reimer, djreimer]
+### Changed
+* Add sort_natural filter (#554) [Martin Hanzel, arthanzel]
+* Add forloop.parentloop as a reference to the parent loop (#520) [Justin Li, pushrax]
+* Block parsing moved to BlockBody class (#458) [Dylan Thacker-Smith, dylanahsmith]
+* Add concat filter to concatenate arrays (#429) [Diogo Beato, dvbeato]
+* Ruby 1.9 support dropped (#491) [Justin Li, pushrax]
+* Liquid::Template.file_system's read_template_file method is no longer passed the context. (#441) [James Reid-Smith, sunblaze]
+* Remove support for `liquid_methods`
+
+### Fixed
+* Fix naming of the "context variable" when dynamically including a template (#559) [Justin Li, pushrax]
+* Gracefully accept empty strings in the date filter (#555) [Loren Hale, boobooninja]
+* Fix capturing into variables with a hyphen in the name (#505) [Florian Weingarten, fw42]
+* Fix case sensitivity regression in date standard filter (#499) [Kelley Reynolds, kreynolds]
+* Disallow filters with no variable in strict mode (#475) [Justin Li, pushrax]
+* Disallow variable names in the strict parser that are not valid in the lax parser (#463) [Justin Li, pushrax]
+* Fix BlockBody#warnings taking exponential time to compute (#486) [Justin Li, pushrax]
+
+## 3.0.2 / 2015-04-24 / branch "3-0-stable"
+
+* Expose VariableLookup private members (#551) [Justin Li, pushrax]
+* Documentation fixes
+
+## 3.0.1 / 2015-01-23
+
+* Remove duplicate `index0` key in TableRow tag (#502) [Alfred Xing]
+
+## 3.0.0 / 2014-11-12
+
+* Removed Block#end_tag. Instead, override parse with `super` followed by your code. See #446 [Dylan Thacker-Smith, dylanahsmith]
+* Fixed condition with wrong data types (#423) [Bogdan Gusiev]
+* Add url_encode to standard filters (#421) [Derrick Reimer, djreimer]
 * Add uniq to standard filters [Florian Weingarten, fw42]
-* Add exception_handler feature, see #397 and #254 [Bogdan Gusiev, bogdan and Florian Weingarten, fw42]
+* Add exception_handler feature (#397) and #254 [Bogdan Gusiev, bogdan and Florian Weingarten, fw42]
 * Optimize variable parsing to avoid repeated regex evaluation during template rendering #383 [Jason Hiltz-Laforge, jasonhl]
 * Optimize checking for block interrupts to reduce object allocation #380 [Jason Hiltz-Laforge, jasonhl] 
 * Properly set context rethrow_errors on render! #349 [Thierry Joyal, tjoyal]
-* Fix broken rendering of variables which are equal to false, see #345 [Florian Weingarten, fw42]
+* Fix broken rendering of variables which are equal to false (#345) [Florian Weingarten, fw42]
 * Remove ActionView template handler [Dylan Thacker-Smith, dylanahsmith]
-* Freeze lots of string literals for new Ruby 2.1 optimization, see #297 [Florian Weingarten, fw42]
-* Allow newlines in tags and variables, see #324 [Dylan Thacker-Smith, dylanahsmith]
+* Freeze lots of string literals for new Ruby 2.1 optimization (#297) [Florian Weingarten, fw42]
+* Allow newlines in tags and variables (#324) [Dylan Thacker-Smith, dylanahsmith]
 * Tag#parse is called after initialize, which now takes options instead of tokens as the 3rd argument. See #321 [Dylan Thacker-Smith, dylanahsmith]
 * Raise `Liquid::ArgumentError` instead of `::ArgumentError` when filter has wrong number of arguments #309 [Bogdan Gusiev, bogdan]
-* Add a to_s default for liquid drops, see #306 [Adam Doeler, releod]
+* Add a to_s default for liquid drops (#306) [Adam Doeler, releod]
 * Add strip, lstrip, and rstrip to standard filters [Florian Weingarten, fw42]
-* Make if, for & case tags return complete and consistent nodelists, see #250 [Nick Jones, dntj]
-* Prevent arbitrary method invocation on condition objects, see #274 [Dylan Thacker-Smith, dylanahsmith]
-* Don't call to_sym when creating conditions for security reasons, see #273 [Bouke van der Bijl, bouk]
-* Fix resource counting bug with respond_to?(:length), see #263 [Florian Weingarten, fw42]
-* Allow specifying custom patterns for template filenames, see #284 [Andrei Gladkyi, agladkyi]
-* Allow drops to optimize loading a slice of elements, see #282 [Tom Burns, boourns]
-* Support for passing variables to snippets in subdirs, see #271 [Joost Hietbrink, joost]
-* Add a class cache to avoid runtime extend calls, see #249 [James Tucker, raggi]
-* Remove some legacy Ruby 1.8 compatibility code, see #276 [Florian Weingarten, fw42]
-* Add default filter to standard filters, see #267 [Derrick Reimer, djreimer]
-* Add optional strict parsing and warn parsing, see #235 [Tristan Hume, trishume]
-* Add I18n syntax error translation, see #241 [Simon Hørup Eskildsen, Sirupsen]
-* Make sort filter work on enumerable drops, see #239 [Florian Weingarten, fw42]
-* Fix clashing method names in enumerable drops, see #238 [Florian Weingarten, fw42]
-* Make map filter work on enumerable drops, see #233 [Florian Weingarten, fw42]
+* Make if, for & case tags return complete and consistent nodelists (#250) [Nick Jones, dntj]
+* Prevent arbitrary method invocation on condition objects (#274) [Dylan Thacker-Smith, dylanahsmith]
+* Don't call to_sym when creating conditions for security reasons (#273) [Bouke van der Bijl, bouk]
+* Fix resource counting bug with respond_to?(:length) (#263) [Florian Weingarten, fw42]
+* Allow specifying custom patterns for template filenames (#284) [Andrei Gladkyi, agladkyi]
+* Allow drops to optimize loading a slice of elements (#282) [Tom Burns, boourns]
+* Support for passing variables to snippets in subdirs (#271) [Joost Hietbrink, joost]
+* Add a class cache to avoid runtime extend calls (#249) [James Tucker, raggi]
+* Remove some legacy Ruby 1.8 compatibility code (#276) [Florian Weingarten, fw42]
+* Add default filter to standard filters (#267) [Derrick Reimer, djreimer]
+* Add optional strict parsing and warn parsing (#235) [Tristan Hume, trishume]
+* Add I18n syntax error translation (#241) [Simon Hørup Eskildsen, Sirupsen]
+* Make sort filter work on enumerable drops (#239) [Florian Weingarten, fw42]
+* Fix clashing method names in enumerable drops (#238) [Florian Weingarten, fw42]
+* Make map filter work on enumerable drops (#233) [Florian Weingarten, fw42]
 * Improved whitespace stripping for blank blocks, related to #216 [Florian Weingarten, fw42]
 
 ## 2.6.1 / 2014-01-10 / branch "2-6-stable"
 
 Security fix, cherry-picked from master (4e14a65):
-* Don't call to_sym when creating conditions for security reasons, see #273 [Bouke van der Bijl, bouk]
-* Prevent arbitrary method invocation on condition objects, see #274 [Dylan Thacker-Smith, dylanahsmith]
+* Don't call to_sym when creating conditions for security reasons (#273) [Bouke van der Bijl, bouk]
+* Prevent arbitrary method invocation on condition objects (#274) [Dylan Thacker-Smith, dylanahsmith]
 
 ## 2.6.0 / 2013-11-25
 
@@ -68,12 +97,12 @@ The following releases will only be tested against Ruby 1.9 and Ruby 2.0 and are
 ## 2.5.5 / 2014-01-10 / branch "2-5-stable"
 
 Security fix, cherry-picked from master (4e14a65):
-* Don't call to_sym when creating conditions for security reasons, see #273 [Bouke van der Bijl, bouk]
-* Prevent arbitrary method invocation on condition objects, see #274 [Dylan Thacker-Smith, dylanahsmith]
+* Don't call to_sym when creating conditions for security reasons (#273) [Bouke van der Bijl, bouk]
+* Prevent arbitrary method invocation on condition objects (#274) [Dylan Thacker-Smith, dylanahsmith]
 
 ## 2.5.4 / 2013-11-11
 
-* Fix "can't convert Fixnum into String" for "replace", see #173, [wǒ_is神仙, jsw0528]
+* Fix "can't convert Fixnum into String" for "replace" (#173), [wǒ_is神仙, jsw0528]
 
 ## 2.5.3 / 2013-10-09
 

README.md

@@ -1,5 +1,5 @@
-[![Build Status](https://secure.travis-ci.org/Shopify/liquid.png?branch=master)](http://travis-ci.org/Shopify/liquid)
-[![Inline docs](http://inch-ci.org/github/Shopify/liquid.png)](http://inch-ci.org/github/Shopify/liquid)
+[![Build Status](https://api.travis-ci.org/Shopify/liquid.svg?branch=master)](http://travis-ci.org/Shopify/liquid)
+[![Inline docs](http://inch-ci.org/github/Shopify/liquid.svg?branch=master)](http://inch-ci.org/github/Shopify/liquid)
 
 # Liquid template engine
 

Rakefile

@@ -3,7 +3,7 @@ require 'rake/testtask'
 $LOAD_PATH.unshift File.expand_path("../lib", __FILE__)
 require "liquid/version"
 
-task :default => 'test'
+task default: [:rubocop, :test]
 
 desc 'run test suite with default parser'
 Rake::TestTask.new(:base_test) do |t|
@@ -18,6 +18,11 @@ task :warn_test do
   Rake::Task['base_test'].invoke
 end
 
+task :rubocop do
+  require 'rubocop/rake_task'
+  RuboCop::RakeTask.new
+end
+
 desc 'runs test suite with both strict and lax parsers'
 task :test do
   ENV['LIQUID_PARSER_MODE'] = 'lax'
@@ -27,16 +32,16 @@ task :test do
   Rake::Task['base_test'].invoke
 end
 
-task :gem => :build
+task gem: :build
 task :build do
   system "gem build liquid.gemspec"
 end
 
-task :install => :build do
+task install: :build do
   system "gem install liquid-#{Liquid::VERSION}.gem"
 end
 
-task :release => :build do
+task release: :build do
   system "git tag -a v#{Liquid::VERSION} -m 'Tagging #{Liquid::VERSION}'"
   system "git push --tags"
   system "gem push liquid-#{Liquid::VERSION}.gem"
@@ -44,7 +49,6 @@ task :release => :build do
 end
 
 namespace :benchmark do
-
   desc "Run the liquid benchmark with lax parsing"
   task :run do
     ruby "./performance/benchmark.rb lax"
@@ -56,9 +60,7 @@ namespace :benchmark do
   end
 end
 
-
 namespace :profile do
-
   desc "Run the liquid profile/performance coverage"
   task :run do
     ruby "./performance/profile.rb"
@@ -68,7 +70,6 @@ namespace :profile do
   task :strict do
     ruby "./performance/profile.rb strict"
   end
-
 end
 
 desc "Run example"

circle.yml

@@ -0,0 +1,3 @@
+machine:
+  ruby:
+    version: ruby-2.0

example/server/example_servlet.rb

@@ -4,7 +4,7 @@ module ProductsFilter
   end
 
   def prettyprint(text)
-    text.gsub( /\*(.*)\*/, '<b>\1</b>' )
+    text.gsub(/\*(.*)\*/, '<b>\1</b>')
   end
 
   def count(array)
@@ -17,25 +17,28 @@ module ProductsFilter
 end
 
 class Servlet < LiquidServlet
-
   def index
     { 'date' => Time.now }
   end
 
   def products
-    { 'products' => products_list, 'description' => description, 'section' => 'Snowboards', 'cool_products' => true}
+    { 'products' => products_list, 'more_products' => more_products_list, 'description' => description, 'section' => 'Snowboards', 'cool_products' => true }
   end
 
   private
 
   def products_list
-    [{'name' => 'Arbor Draft', 'price' => 39900, 'description' => 'the *arbor draft* is a excellent product' },
-    {'name' => 'Arbor Element', 'price' => 40000, 'description' => 'the *arbor element* rocks for freestyling'},
-    {'name' => 'Arbor Diamond', 'price' => 59900, 'description' => 'the *arbor diamond* is a made up product because im obsessed with arbor and have no creativity'}]
+    [{ 'name' => 'Arbor Draft', 'price' => 39900, 'description' => 'the *arbor draft* is a excellent product' },
+     { 'name' => 'Arbor Element', 'price' => 40000, 'description' => 'the *arbor element* rocks for freestyling' },
+     { 'name' => 'Arbor Diamond', 'price' => 59900, 'description' => 'the *arbor diamond* is a made up product because im obsessed with arbor and have no creativity' }]
+  end
+
+  def more_products_list
+    [{ 'name' => 'Arbor Catalyst', 'price' => 39900, 'description' => 'the *arbor catalyst* is an advanced drop-through for freestyle and flatground performance and versatility' },
+     { 'name' => 'Arbor Fish', 'price' => 40000, 'description' => 'the *arbor fish* is a compact pin that features an extended wheelbase and time-honored teardrop shape' }]
   end
 
   def description
     "List of Products ~ This is a list of products with price and description."
   end
-
 end

example/server/liquid_servlet.rb

@@ -11,7 +11,8 @@ class LiquidServlet < WEBrick::HTTPServlet::AbstractServlet
   private
 
   def handle(type, req, res)
-    @request, @response = req, res
+    @request = req
+    @response = res
 
     @request.path_info =~ /(\w+)\z/
     @action = $1 || 'index'
@@ -23,6 +24,6 @@ class LiquidServlet < WEBrick::HTTPServlet::AbstractServlet
   end
 
   def read_template(filename = @action)
-    File.read( File.dirname(__FILE__) + "/templates/#{filename}.liquid" )
+    File.read("#{__dir__}/templates/#{filename}.liquid")
   end
 end

example/server/server.rb

@@ -1,14 +1,12 @@
 require 'webrick'
 require 'rexml/document'
 
-DIR = File.expand_path(File.dirname(__FILE__))
-
-require DIR + '/../../lib/liquid'
-require DIR + '/liquid_servlet'
-require DIR + '/example_servlet'
+require_relative '../../lib/liquid'
+require_relative 'liquid_servlet'
+require_relative 'example_servlet'
 
 # Setup webrick
-server = WEBrick::HTTPServer.new( :Port => ARGV[1] || 3000 )
+server = WEBrick::HTTPServer.new(Port: ARGV[1] || 3000)
 server.mount('/', Servlet)
 trap("INT"){ server.shutdown }
 server.start

example/server/templates/products.liquid

@@ -16,12 +16,12 @@
   </head>
 
   <body>
-
+    {% assign all_products = products | concat: more_products  %}
     <h1>{{ description | split: '~' | first }}</h1>
 
     <h2>{{ description | split: '~' | last }}</h2>
 
-    <h2>There are currently {{products | count}} products in the {{section}} catalog</h2>
+    <h2>There are currently {{all_products | count}} products in the {{section}} catalog</h2>
 
     {% if cool_products %}
       Cool products :)
@@ -31,7 +31,7 @@
 
     <ul id="products">
 
-      {% for product in products %}
+      {% for product in all_products %}
         <li>
           <h2>{{product.name}}</h2>
           Only {{product.price | price }}

lib/liquid.rb

@@ -57,21 +57,19 @@ require 'liquid/context'
 require 'liquid/parser_switching'
 require 'liquid/tag'
 require 'liquid/block'
+require 'liquid/block_body'
 require 'liquid/document'
 require 'liquid/variable'
 require 'liquid/variable_lookup'
 require 'liquid/range_lookup'
 require 'liquid/file_system'
+require 'liquid/resource_limits'
 require 'liquid/template'
 require 'liquid/standardfilters'
 require 'liquid/condition'
-require 'liquid/module_ex'
 require 'liquid/utils'
 require 'liquid/token'
 
 # Load all the tags of the standard library
 #
-Dir[File.dirname(__FILE__) + '/liquid/tags/*.rb'].each { |f| require f }
-
-require 'liquid/profiler'
-require 'liquid/profiler/hooks'
+Dir["#{__dir__}/liquid/tags/*.rb"].each { |f| require f }

lib/liquid/block.rb

@@ -1,68 +1,26 @@
 module Liquid
   class Block < Tag
-    FullToken         = /\A#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}\z/om
-    ContentOfVariable = /\A#{VariableStart}(.*)#{VariableEnd}\z/om
-    TAGSTART = "{%".freeze
-    VARSTART = "{{".freeze
+    def initialize(tag_name, markup, options)
+      super
+      @blank = true
+    end
+
+    def parse(tokens)
+      @body = BlockBody.new
+      while more = parse_body(@body, tokens)
+      end
+    end
+
+    def render(context)
+      @body.render(context)
+    end
 
     def blank?
       @blank
     end
 
-    def parse(tokens)
-      @blank = true
-      @nodelist ||= []
-      @nodelist.clear
-
-      # All child tags of the current block.
-      @children = []
-
-      while token = tokens.shift
-        unless token.empty?
-          case
-          when token.start_with?(TAGSTART)
-            if token =~ FullToken
-
-              # if we found the proper block delimiter just end parsing here and let the outer block
-              # proceed
-              if block_delimiter == $1
-                end_tag
-                return
-              end
-
-              # fetch the tag from registered blocks
-              if tag = Template.tags[$1]
-                markup = token.is_a?(Token) ? token.child($2) : $2
-                new_tag = tag.parse($1, markup, tokens, @options)
-                new_tag.line_number = token.line_number if token.is_a?(Token)
-                @blank &&= new_tag.blank?
-                @nodelist << new_tag
-                @children << new_tag
-              else
-                # this tag is not registered with the system
-                # pass it to the current block for special handling or error reporting
-                unknown_tag($1, $2, tokens)
-              end
-            else
-              raise SyntaxError.new(options[:locale].t("errors.syntax.tag_termination".freeze, :token => token, :tag_end => TagEnd.inspect))
-            end
-          when token.start_with?(VARSTART)
-            new_var = create_variable(token)
-            new_var.line_number = token.line_number if token.is_a?(Token)
-            @nodelist << new_var
-            @children << new_var
-            @blank = false
-          else
-            @nodelist << token
-            @blank &&= (token =~ /\A\s*\z/)
-          end
-        end
-      end
-
-      # Make sure that it's ok to end parsing in the current block.
-      # Effectively this method will throw an exception unless the current block is
-      # of type Document
-      assert_missing_delimitation!
+    def nodelist
+      @body.nodelist
     end
 
     # warnings of this block and all sub-tags
@@ -70,27 +28,24 @@ module Liquid
       all_warnings = []
       all_warnings.concat(@warnings) if @warnings
 
-      (@children || []).each do |node|
-        all_warnings.concat(node.warnings || [])
+      (nodelist || []).each do |node|
+        all_warnings.concat(node.warnings || []) if node.respond_to?(:warnings)
       end
 
       all_warnings
     end
 
-    def end_tag
-    end
-
-    def unknown_tag(tag, params, tokens)
+    def unknown_tag(tag, _params, _tokens)
       case tag
       when 'else'.freeze
         raise SyntaxError.new(options[:locale].t("errors.syntax.unexpected_else".freeze,
-                                                 :block_name => block_name))
+          block_name: block_name))
       when 'end'.freeze
         raise SyntaxError.new(options[:locale].t("errors.syntax.invalid_delimiter".freeze,
-                                                 :block_name => block_name,
-                                                 :block_delimiter => block_delimiter))
+          block_name: block_name,
+          block_delimiter: block_delimiter))
       else
-        raise SyntaxError.new(options[:locale].t("errors.syntax.unknown_tag".freeze, :tag => tag))
+        raise SyntaxError.new(options[:locale].t("errors.syntax.unknown_tag".freeze, tag: tag))
       end
     end
 
@@ -102,65 +57,23 @@ module Liquid
       @block_delimiter ||= "end#{block_name}"
     end
 
-    def create_variable(token)
-      token.scan(ContentOfVariable) do |content|
-        markup = token.is_a?(Token) ? token.child(content.first) : content.first
-        return Variable.new(markup, @options)
-      end
-      raise SyntaxError.new(options[:locale].t("errors.syntax.variable_termination".freeze, :token => token, :tag_end => VariableEnd.inspect))
-    end
-
-    def render(context)
-      render_all(@nodelist, context)
-    end
-
     protected
 
-    def assert_missing_delimitation!
-      raise SyntaxError.new(options[:locale].t("errors.syntax.tag_never_closed".freeze, :block_name => block_name))
-    end
+    def parse_body(body, tokens)
+      body.parse(tokens, options) do |end_tag_name, end_tag_params|
+        @blank &&= body.blank?
 
-    def render_all(list, context)
-      output = []
-      context.resource_limits[:render_length_current] = 0
-      context.resource_limits[:render_score_current] += list.length
-
-      list.each do |token|
-        # Break out if we have any unhanded interrupts.
-        break if context.has_interrupt?
-
-        begin
-          # If we get an Interrupt that means the block must stop processing. An
-          # Interrupt is any command that stops block execution such as {% break %}
-          # or {% continue %}
-          if token.is_a? Continue or token.is_a? Break
-            context.push_interrupt(token.interrupt)
-            break
-          end
-
-          token_output = render_token(token, context)
-
-          unless token.is_a?(Block) && token.blank?
-            output << token_output
-          end
-        rescue MemoryError => e
-          raise e
-        rescue ::StandardError => e
-          output << (context.handle_error(e, token))
+        return false if end_tag_name == block_delimiter
+        unless end_tag_name
+          raise SyntaxError.new(@options[:locale].t("errors.syntax.tag_never_closed".freeze, block_name: block_name))
         end
+
+        # this tag is not registered with the system
+        # pass it to the current block for special handling or error reporting
+        unknown_tag(end_tag_name, end_tag_params, tokens)
       end
 
-      output.join
-    end
-
-    def render_token(token, context)
-      token_output = (token.respond_to?(:render) ? token.render(context) : token)
-      context.increment_used_resources(:render_length_current, token_output)
-      if context.resource_limits_reached?
-        context.resource_limits[:reached] = true
-        raise MemoryError.new("Memory limits exceeded".freeze)
-      end
-      token_output
+      true
     end
   end
 end

lib/liquid/block_body.rb

@@ -0,0 +1,131 @@
+module Liquid
+  class BlockBody
+    FullToken = /\A#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}\z/om
+    ContentOfVariable = /\A#{VariableStart}(.*)#{VariableEnd}\z/om
+    TAGSTART = "{%".freeze
+    VARSTART = "{{".freeze
+
+    attr_reader :nodelist
+
+    def initialize
+      @nodelist = []
+      @blank = true
+    end
+
+    def parse(tokens, options)
+      while token = tokens.shift
+        begin
+          unless token.empty?
+            case
+            when token.start_with?(TAGSTART)
+              if token =~ FullToken
+                tag_name = $1
+                markup = $2
+                # fetch the tag from registered blocks
+                if tag = Template.tags[tag_name]
+                  markup = token.child(markup) if token.is_a?(Token)
+                  new_tag = tag.parse(tag_name, markup, tokens, options)
+                  new_tag.line_number = token.line_number if token.is_a?(Token)
+                  @blank &&= new_tag.blank?
+                  @nodelist << new_tag
+                else
+                  # end parsing if we reach an unknown tag and let the caller decide
+                  # determine how to proceed
+                  return yield tag_name, markup
+                end
+              else
+                raise_missing_tag_terminator(token, options)
+              end
+            when token.start_with?(VARSTART)
+              new_var = create_variable(token, options)
+              new_var.line_number = token.line_number if token.is_a?(Token)
+              @nodelist << new_var
+              @blank = false
+            else
+              @nodelist << token
+              @blank &&= !!(token =~ /\A\s*\z/)
+            end
+          end
+        rescue SyntaxError => e
+          e.set_line_number_from_token(token)
+          raise
+        end
+      end
+
+      yield nil, nil
+    end
+
+    def blank?
+      @blank
+    end
+
+    def warnings
+      all_warnings = []
+      nodelist.each do |node|
+        all_warnings.concat(node.warnings || []) if node.respond_to?(:warnings)
+      end
+      all_warnings
+    end
+
+    def render(context)
+      output = []
+      context.resource_limits.render_score += @nodelist.length
+
+      @nodelist.each do |token|
+        # Break out if we have any unhanded interrupts.
+        break if context.has_interrupt?
+
+        begin
+          # If we get an Interrupt that means the block must stop processing. An
+          # Interrupt is any command that stops block execution such as {% break %}
+          # or {% continue %}
+          if token.is_a?(Continue) || token.is_a?(Break)
+            context.push_interrupt(token.interrupt)
+            break
+          end
+
+          token_output = render_token(token, context)
+
+          unless token.is_a?(Block) && token.blank?
+            output << token_output
+          end
+        rescue MemoryError => e
+          raise e
+        rescue ::StandardError => e
+          output << context.handle_error(e, token)
+        end
+      end
+
+      output.join
+    end
+
+    private
+
+    def render_token(token, context)
+      token_output = (token.respond_to?(:render) ? token.render(context) : token)
+      token_str = token_output.is_a?(Array) ? token_output.join : token_output.to_s
+
+      context.resource_limits.render_length += token_str.length
+      if context.resource_limits.reached?
+        raise MemoryError.new("Memory limits exceeded".freeze)
+      end
+      token_str
+    end
+
+    def create_variable(token, options)
+      token.scan(ContentOfVariable) do |content|
+        markup = token.is_a?(Token) ? token.child(content.first) : content.first
+        return Variable.new(markup, options)
+      end
+      raise_missing_variable_terminator(token, options)
+    end
+
+    def raise_missing_tag_terminator(token, options)
+      raise SyntaxError.new(options[:locale].t("errors.syntax.tag_termination".freeze, token: token, tag_end: TagEnd.inspect))
+    end
+
+    def raise_missing_variable_terminator(token, options)
+      raise SyntaxError.new(options[:locale].t("errors.syntax.variable_termination".freeze, token: token, tag_end: VariableEnd.inspect))
+    end
+  end
+end

lib/liquid/condition.rb

@@ -3,21 +3,21 @@ module Liquid
   #
   # Example:
   #
-  #   c = Condition.new('1', '==', '1')
+  #   c = Condition.new(1, '==', 1)
   #   c.evaluate #=> true
   #
   class Condition #:nodoc:
     @@operators = {
-      '=='.freeze => lambda { |cond, left, right|  cond.send(:equal_variables, left, right) },
-      '!='.freeze => lambda { |cond, left, right| !cond.send(:equal_variables, left, right) },
-      '<>'.freeze => lambda { |cond, left, right| !cond.send(:equal_variables, left, right) },
+      '=='.freeze => ->(cond, left, right) {  cond.send(:equal_variables, left, right) },
+      '!='.freeze => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
+      '<>'.freeze => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
       '<'.freeze  => :<,
       '>'.freeze  => :>,
       '>='.freeze => :>=,
       '<='.freeze => :<=,
-      'contains'.freeze => lambda { |cond, left, right|
+      'contains'.freeze => lambda do |cond, left, right|
         left && right && left.respond_to?(:include?) ? left.include?(right) : false
-      }
+      end
     }
 
     def self.operators
@@ -28,7 +28,9 @@ module Liquid
     attr_accessor :left, :operator, :right
 
     def initialize(left = nil, operator = nil, right = nil)
-      @left, @operator, @right = left, operator, right
+      @left = left
+      @operator = operator
+      @right = right
       @child_relation  = nil
       @child_condition = nil
     end
@@ -47,11 +49,13 @@ module Liquid
     end
 
     def or(condition)
-      @child_relation, @child_condition = :or, condition
+      @child_relation = :or
+      @child_condition = condition
     end
 
     def and(condition)
-      @child_relation, @child_condition = :and, condition
+      @child_relation = :and
+      @child_condition = condition
     end
 
     def attach(attachment)
@@ -92,35 +96,32 @@ module Liquid
       # If the operator is empty this means that the decision statement is just
       # a single variable. We can just poll this variable from the context and
       # return this as the result.
-      return context[left] if op == nil
+      return context.evaluate(left) if op.nil?
 
-      left, right = context[left], context[right]
+      left = context.evaluate(left)
+      right = context.evaluate(right)
 
       operation = self.class.operators[op] || raise(Liquid::ArgumentError.new("Unknown operator #{op}"))
 
       if operation.respond_to?(:call)
         operation.call(self, left, right)
-      elsif left.respond_to?(operation) and right.respond_to?(operation)
+      elsif left.respond_to?(operation) && right.respond_to?(operation)
         begin
           left.send(operation, right)
         rescue ::ArgumentError => e
           raise Liquid::ArgumentError.new(e.message)
         end
-      else
-        nil
       end
     end
   end
 
-
   class ElseCondition < Condition
     def else?
       true
     end
 
-    def evaluate(context)
+    def evaluate(_context)
       true
     end
   end
-
 end

lib/liquid/context.rb

@@ -1,5 +1,4 @@
 module Liquid
-
   # Context keeps the variable stack and resolves variables, as well as keywords
   #
   #   context['variable'] = 'testing'
@@ -14,18 +13,16 @@ module Liquid
   #   context['bob']  #=> nil  class Context
   class Context
     attr_reader :scopes, :errors, :registers, :environments, :resource_limits
-    attr_accessor :exception_handler
+    attr_accessor :exception_handler, :render_errors
 
     def initialize(environments = {}, outer_scope = {}, registers = {}, rethrow_errors = false, resource_limits = nil)
       @environments     = [environments].flatten
       @scopes           = [(outer_scope || {})]
       @registers        = registers
       @errors           = []
-      @resource_limits  = resource_limits || Template.default_resource_limits
-      @resource_limits[:render_score_current] = 0
-      @resource_limits[:assign_score_current] = 0
-      @parsed_expression = Hash.new{ |cache, markup| cache[markup] = Expression.parse(markup) }
+      @resource_limits  = resource_limits || ResourceLimits.new(Template.default_resource_limits)
       squash_instance_assigns_with_environments
+      @render_errors    = true
 
       @this_stack_used = false
 
@@ -37,20 +34,6 @@ module Liquid
       @filters = []
     end
 
-    def increment_used_resources(key, obj)
-      @resource_limits[key] += if obj.kind_of?(String) || obj.kind_of?(Array) || obj.kind_of?(Hash)
-        obj.length
-      else
-        1
-      end
-    end
-
-    def resource_limits_reached?
-      (@resource_limits[:render_length_limit] && @resource_limits[:render_length_current] > @resource_limits[:render_length_limit]) ||
-      (@resource_limits[:render_score_limit]  && @resource_limits[:render_score_current]  > @resource_limits[:render_score_limit] ) ||
-      (@resource_limits[:assign_score_limit]  && @resource_limits[:assign_score_current]  > @resource_limits[:assign_score_limit] )
-    end
-
     def strainer
       @strainer ||= Strainer.create(self, @filters)
     end
@@ -61,21 +44,8 @@ module Liquid
     # for that
     def add_filters(filters)
       filters = [filters].flatten.compact
-      filters.each do |f|
-        raise ArgumentError, "Expected module but got: #{f.class}" unless f.is_a?(Module)
-        Strainer.add_known_filter(f)
-      end
-
-      # If strainer is already setup then there's no choice but to use a runtime
-      # extend call. If strainer is not yet created, we can utilize strainers
-      # cached class based API, which avoids busting the method cache.
-      if @strainer
-        filters.each do |f|
-          strainer.extend(f)
-        end
-      else
-        @filters.concat filters
-      end
+      @filters += filters
+      @strainer = nil
     end
 
     # are there any not handled interrupts?
@@ -93,15 +63,14 @@ module Liquid
       @interrupts.pop
     end
 
-
-    def handle_error(e, token=nil)
+    def handle_error(e, token = nil)
       if e.is_a?(Liquid::Error)
         e.set_line_number_from_token(token)
       end
 
       errors.push(e)
       raise if exception_handler && exception_handler.call(e)
-      Liquid::Error.render(e)
+      render_errors ? Liquid::Error.render(e) : ''
     end
 
     def invoke(method, *args)
@@ -109,7 +78,7 @@ module Liquid
     end
 
     # Push new local scope on the stack. use <tt>Context#stack</tt> instead
-    def push(new_scope={})
+    def push(new_scope = {})
       @scopes.unshift(new_scope)
       raise StackLevelError, "Nesting too deep".freeze if @scopes.length > 100
     end
@@ -133,7 +102,7 @@ module Liquid
     #   end
     #
     #   context['var]  #=> nil
-    def stack(new_scope=nil)
+    def stack(new_scope = nil)
       old_stack_used = @this_stack_used
       if new_scope
         push(new_scope)
@@ -170,7 +139,7 @@ module Liquid
     # Example:
     #   products == empty #=> products.empty?
     def [](expression)
-      evaluate(@parsed_expression[expression])
+      evaluate(Expression.parse(expression))
     end
 
     def has_key?(key)
@@ -183,7 +152,6 @@ module Liquid
 
     # Fetches an object starting at the local scope and then moving up the hierachy
     def find_variable(key)
-
       # This was changed from find() to find_index() because this is a very hot
       # path and find_index() is optimized in MRI to reduce object allocation
       index = @scopes.find_index { |s| s.has_key?(key) }
@@ -201,13 +169,13 @@ module Liquid
         end
       end
 
-      scope     ||= @environments.last || @scopes.last
-      variable  ||= lookup_and_evaluate(scope, key)
+      scope ||= @environments.last || @scopes.last
+      variable ||= lookup_and_evaluate(scope, key)
 
       variable = variable.to_liquid
       variable.context = self if variable.respond_to?(:context=)
 
-      return variable
+      variable
     end
 
     def lookup_and_evaluate(obj, key)
@@ -219,15 +187,16 @@ module Liquid
     end
 
     private
-      def squash_instance_assigns_with_environments
-        @scopes.last.each_key do |k|
-          @environments.each do |env|
-            if env.has_key?(k)
-              scopes.last[k] = lookup_and_evaluate(env, k)
-              break
-            end
+
+    def squash_instance_assigns_with_environments
+      @scopes.last.each_key do |k|
+        @environments.each do |env|
+          if env.has_key?(k)
+            scopes.last[k] = lookup_and_evaluate(env, k)
+            break
           end
         end
-      end # squash_instance_assigns_with_environments
+      end
+    end # squash_instance_assigns_with_environments
   end # Context
 end # Liquid

lib/liquid/document.rb

@@ -1,17 +1,24 @@
 module Liquid
-  class Document < Block
-    def self.parse(tokens, options={})
-      # we don't need markup to open this block
-      super(nil, nil, tokens, options)
+  class Document < BlockBody
+    def self.parse(tokens, options)
+      doc = new
+      doc.parse(tokens, options)
+      doc
     end
 
-    # There isn't a real delimiter
-    def block_delimiter
-      []
+    def parse(tokens, options)
+      super do |end_tag_name, end_tag_params|
+        unknown_tag(end_tag_name, options) if end_tag_name
+      end
     end
 
-    # Document blocks don't need to be terminated since they are not actually opened
-    def assert_missing_delimitation!
+    def unknown_tag(tag, options)
+      case tag
+      when 'else'.freeze, 'end'.freeze
+        raise SyntaxError.new(options[:locale].t("errors.syntax.unexpected_outer_tag".freeze, tag: tag))
+      else
+        raise SyntaxError.new(options[:locale].t("errors.syntax.unknown_tag".freeze, tag: tag))
+      end
     end
   end
 end

lib/liquid/drop.rb

@@ -1,7 +1,6 @@
 require 'set'
 
 module Liquid
-
   # A drop in liquid is a class which allows you to export DOM like things to liquid.
   # Methods of drops are callable.
   # The main use for liquid drops is to implement lazy loaded objects.
@@ -27,7 +26,7 @@ module Liquid
     EMPTY_STRING = ''.freeze
 
     # Catch all for the method
-    def before_method(method)
+    def before_method(_method)
       nil
     end
 
@@ -40,7 +39,7 @@ module Liquid
       end
     end
 
-    def has_key?(name)
+    def has_key?(_name)
       true
     end
 
@@ -56,12 +55,16 @@ module Liquid
       self.class.name
     end
 
-    alias :[] :invoke_drop
+    alias_method :[], :invoke_drop
 
     private
 
     # Check for method existence without invoking respond_to?, which creates symbols
     def self.invokable?(method_name)
+      invokable_methods.include?(method_name.to_s)
+    end
+
+    def self.invokable_methods
       unless @invokable_methods
         blacklist = Liquid::Drop.public_instance_methods + [:each]
         if include?(Enumerable)
@@ -71,7 +74,7 @@ module Liquid
         whitelist = [:to_liquid] + (public_instance_methods - blacklist)
         @invokable_methods = Set.new(whitelist.map(&:to_s))
       end
-      @invokable_methods.include?(method_name.to_s)
+      @invokable_methods
     end
   end
 end

lib/liquid/errors.rb

@@ -3,7 +3,7 @@ module Liquid
     attr_accessor :line_number
     attr_accessor :markup_context
 
-    def to_s(with_prefix=true)
+    def to_s(with_prefix = true)
       str = ""
       str << message_prefix if with_prefix
       str << super()
@@ -18,6 +18,7 @@ module Liquid
 
     def set_line_number_from_token(token)
       return unless token.respond_to?(:line_number)
+      return if line_number
       self.line_number = token.line_number
     end
 
@@ -25,7 +26,7 @@ module Liquid
       if e.is_a?(Liquid::Error)
         e.to_s
       else
-        "Liquid error: #{e.to_s}"
+        "Liquid error: #{e}"
       end
     end
 
@@ -48,12 +49,16 @@ module Liquid
     end
   end
 
-  class ArgumentError < Error; end
-  class ContextError < Error; end
-  class FilterNotFound < Error; end
-  class FileSystemError < Error; end
-  class StandardError < Error; end
-  class SyntaxError < Error; end
-  class StackLevelError < Error; end
-  class MemoryError < Error; end
+  class FilterError < Error
+    attr_accessor :original_exception
+  end
+
+  ArgumentError = Class.new(Error)
+  ContextError = Class.new(Error)
+  FileSystemError = Class.new(Error)
+  StandardError = Class.new(Error)
+  SyntaxError = Class.new(Error)
+  StackLevelError = Class.new(Error)
+  TaintedError = Class.new(Error)
+  MemoryError = Class.new(Error)
 end

lib/liquid/expression.rb

@@ -28,6 +28,5 @@ module Liquid
         end
       end
     end
-
   end
 end

lib/liquid/file_system.rb

@@ -14,7 +14,7 @@ module Liquid
   # This will parse the template with a LocalFileSystem implementation rooted at 'template_path'.
   class BlankFileSystem
     # Called by Liquid to retrieve a template file
-    def read_template_file(template_path, context)
+    def read_template_file(_template_path)
       raise FileSystemError, "This liquid context does not allow includes."
     end
   end
@@ -49,9 +49,9 @@ module Liquid
       @pattern = pattern
     end
 
-    def read_template_file(template_path, context)
+    def read_template_file(template_path)
       full_path = full_path(template_path)
-      raise FileSystemError, "No such template '#{template_path}'" unless File.exists?(full_path)
+      raise FileSystemError, "No such template '#{template_path}'" unless File.exist?(full_path)
 
       File.read(full_path)
     end

lib/liquid/i18n.rb

@@ -2,10 +2,9 @@ require 'yaml'
 
 module Liquid
   class I18n
-    DEFAULT_LOCALE = File.join(File.expand_path(File.dirname(__FILE__)), "locales", "en.yml")
+    DEFAULT_LOCALE = File.join(File.expand_path(__dir__), "locales", "en.yml")
 
-    class TranslationError < StandardError
-    end
+    TranslationError = Class.new(StandardError)
 
     attr_reader :path
 
@@ -23,6 +22,7 @@ module Liquid
     end
 
     private
+
     def interpolate(name, vars)
       name.gsub(/%\{(\w+)\}/) {
         # raise TranslationError, "Undefined key #{$1} for interpolation in translation #{name}"  unless vars[$1.to_sym]

lib/liquid/interrupts.rb

@@ -1,10 +1,9 @@
 module Liquid
-
   # An interrupt is any command that breaks processing of a block (ex: a for loop).
   class Interrupt
     attr_reader :message
 
-    def initialize(message=nil)
+    def initialize(message = nil)
       @message = message || "interrupt".freeze
     end
   end

lib/liquid/lexer.rb

@@ -9,9 +9,11 @@ module Liquid
       '['.freeze => :open_square,
       ']'.freeze => :close_square,
       '('.freeze => :open_round,
-      ')'.freeze => :close_round
+      ')'.freeze => :close_round,
+      '?'.freeze => :question,
+      '-'.freeze => :dash
     }
-    IDENTIFIER = /[\w\-?!]+/
+    IDENTIFIER = /[a-zA-Z_][\w-]*\??/
     SINGLE_STRING_LITERAL = /'[^\']*'/
     DOUBLE_STRING_LITERAL = /"[^\"]*"/
     NUMBER_LITERAL = /-?\d+(\.\d+)?/
@@ -25,7 +27,7 @@ module Liquid
     def tokenize
       @output = []
 
-      while !@ss.eos?
+      until @ss.eos?
         @ss.skip(/\s*/)
         tok = case
         when t = @ss.scan(COMPARISON_OPERATOR) then [:comparison, t]
@@ -37,7 +39,7 @@ module Liquid
         else
           c = @ss.getch
           if s = SPECIALS[c]
-            [s,c]
+            [s, c]
           else
             raise SyntaxError, "Unexpected character #{c}"
           end

lib/liquid/locales/en.yml

@@ -14,7 +14,8 @@
       include: "Error in tag 'include' - Valid syntax: include '[template]' (with|for) [object|collection]"
       unknown_tag: "Unknown tag '%{tag}'"
       invalid_delimiter: "'end' is not a valid delimiter for %{block_name} tags. use %{block_delimiter}"
-      unexpected_else: "%{block_name} tag does not expect else tag"
+      unexpected_else: "%{block_name} tag does not expect 'else' tag"
+      unexpected_outer_tag: "Unexpected outer '%{tag}' tag"
       tag_termination: "Tag '%{token}' was not properly terminated with regexp: %{tag_end}"
       variable_termination: "Variable '%{token}' was not properly terminated with regexp: %{tag_end}"
       tag_never_closed: "'%{block_name}' tag was never closed"

lib/liquid/module_ex.rb

@@ -1,62 +0,0 @@
-# Copyright 2007 by Domizio Demichelis
-# This library is free software. It may be used, redistributed and/or modified
-# under the same terms as Ruby itself
-#
-# This extension is used in order to expose the object of the implementing class
-# to liquid as it were a Drop. It also limits the liquid-callable methods of the instance
-# to the allowed method passed with the liquid_methods call
-# Example:
-#
-# class SomeClass
-#   liquid_methods :an_allowed_method
-#
-#   def an_allowed_method
-#     'this comes from an allowed method'
-#   end
-#   def unallowed_method
-#     'this will never be an output'
-#   end
-# end
-#
-# if you want to extend the drop to other methods you can defines more methods
-# in the class <YourClass>::LiquidDropClass
-#
-#   class SomeClass::LiquidDropClass
-#     def another_allowed_method
-#       'and this from another allowed method'
-#     end
-#   end
-# end
-#
-# usage:
-# @something = SomeClass.new
-#
-# template:
-# {{something.an_allowed_method}}{{something.unallowed_method}} {{something.another_allowed_method}}
-#
-# output:
-# 'this comes from an allowed method and this from another allowed method'
-#
-# You can also chain associations, by adding the liquid_method call in the
-# association models.
-#
-class Module
-
-  def liquid_methods(*allowed_methods)
-    drop_class = eval "class #{self.to_s}::LiquidDropClass < Liquid::Drop; self; end"
-    define_method :to_liquid do
-      drop_class.new(self)
-    end
-    drop_class.class_eval do
-      def initialize(object)
-        @object = object
-      end
-      allowed_methods.each do |sym|
-        define_method sym do
-          @object.send sym
-        end
-      end
-    end
-  end
-
-end

lib/liquid/parser_switching.rb

@@ -17,6 +17,7 @@ module Liquid
     end
 
     private
+
     def strict_parse_with_error_context(markup)
       strict_parse(markup)
     rescue SyntaxError => e

lib/liquid/profiler.rb

@@ -1,9 +1,11 @@
-module Liquid
+require 'liquid/profiler/hooks'
 
+module Liquid
   # Profiler enables support for profiling template rendering to help track down performance issues.
   #
-  # To enable profiling, pass the <tt>profile: true</tt> option to <tt>Liquid::Template.parse</tt>. Then, after
-  # <tt>Liquid::Template#render</tt> is called, the template object makes available an instance of this
+  # To enable profiling, first require 'liquid/profiler'.
+  # Then, to profile a parse/render cycle, pass the <tt>profile: true</tt> option to <tt>Liquid::Template.parse</tt>.
+  # After <tt>Liquid::Template#render</tt> is called, the template object makes available an instance of this
   # class via the <tt>Liquid::Template#profiler</tt> method.
   #
   #   template = Liquid::Template.parse(template_content, profile: true)
@@ -52,9 +54,7 @@ module Liquid
       end
 
       def self.start(token, partial)
-        new(token, partial).tap do |t|
-          t.start
-        end
+        new(token, partial).tap(&:start)
       end
 
       def start
@@ -136,7 +136,7 @@ module Liquid
       @timing_stack.push(Timing.start(token, current_partial))
     end
 
-    def end_token(token)
+    def end_token(_token)
       timing = @timing_stack.pop
       timing.finish
 
@@ -154,6 +154,5 @@ module Liquid
     def pop_partial
       @partial_stack.pop
     end
-
   end
 end

lib/liquid/profiler/hooks.rb

@@ -1,5 +1,5 @@
 module Liquid
-  class Block < Tag
+  class BlockBody
     def render_token_with_profiling(token, context)
       Profiler.profile_token_render(token) do
         render_token_without_profiling(token, context)
@@ -12,7 +12,7 @@ module Liquid
 
   class Include < Tag
     def render_with_profiling(context)
-      Profiler.profile_children(@template_name) do
+      Profiler.profile_children(context.evaluate(@template_name_expr).to_s) do
         render_without_profiling(context)
       end
     end

lib/liquid/resource_limits.rb

@@ -0,0 +1,23 @@
+module Liquid
+  class ResourceLimits
+    attr_accessor :render_length, :render_score, :assign_score,
+      :render_length_limit, :render_score_limit, :assign_score_limit
+
+    def initialize(limits)
+      @render_length_limit = limits[:render_length_limit]
+      @render_score_limit = limits[:render_score_limit]
+      @assign_score_limit = limits[:assign_score_limit]
+      reset
+    end
+
+    def reached?
+      (@render_length_limit && @render_length > @render_length_limit) ||
+        (@render_score_limit && @render_score > @render_score_limit) ||
+        (@assign_score_limit && @assign_score > @assign_score_limit)
+    end
+
+    def reset
+      @render_length = @render_score = @assign_score = 0
+    end
+  end
+end

lib/liquid/standardfilters.rb

@@ -2,7 +2,6 @@ require 'cgi'
 require 'bigdecimal'
 
 module Liquid
-
   module StandardFilters
     HTML_ESCAPE = {
       '&'.freeze => '&'.freeze,
@@ -34,7 +33,7 @@ module Liquid
     end
 
     def escape(input)
-      CGI.escapeHTML(input) rescue input
+      CGI.escapeHTML(input).untaint rescue input
     end
     alias_method :h, :escape
 
@@ -46,7 +45,7 @@ module Liquid
       CGI.escape(input) rescue input
     end
 
-    def slice(input, offset, length=nil)
+    def slice(input, offset, length = nil)
       offset = Integer(offset)
       length = length ? Integer(length) : 1
 
@@ -59,14 +58,14 @@ module Liquid
 
     # Truncate a string down to x characters
     def truncate(input, length = 50, truncate_string = "...".freeze)
-      if input.nil? then return end
+      return if input.nil?
       l = length.to_i - truncate_string.length
       l = 0 if l < 0
       input.length > length.to_i ? input[0...l] + truncate_string : input
     end
 
     def truncatewords(input, words = 15, truncate_string = "...".freeze)
-      if input.nil? then return end
+      return if input.nil?
       wordlist = input.to_s.split
       l = words.to_i - 1
       l = 0 if l < 0
@@ -116,9 +115,23 @@ module Liquid
       if property.nil?
         ary.sort
       elsif ary.first.respond_to?(:[]) && !ary.first[property].nil?
-        ary.sort {|a,b| a[property] <=> b[property] }
+        ary.sort { |a, b| a[property] <=> b[property] }
       elsif ary.first.respond_to?(property)
-        ary.sort {|a,b| a.send(property) <=> b.send(property) }
+        ary.sort { |a, b| a.send(property) <=> b.send(property) }
+      end
+    end
+
+    # Sort elements of an array ignoring case if strings
+    # provide optional property with which to sort an array of hashes or drops
+    def sort_natural(input, property = nil)
+      ary = InputIterator.new(input)
+
+      if property.nil?
+        ary.sort { |a, b| a.casecmp(b) }
+      elsif ary.first.respond_to?(:[]) && !ary.first[property].nil?
+        ary.sort { |a, b| a[property].casecmp(b[property]) }
+      elsif ary.first.respond_to?(property)
+        ary.sort { |a, b| a.send(property).casecmp(b.send(property)) }
       end
     end
 
@@ -177,6 +190,10 @@ module Liquid
       input.to_s + string.to_s
     end
 
+    def concat(input, array)
+      InputIterator.new(input).concat(array)
+    end
+
     # prepend a string to another
     def prepend(input, string)
       string.to_s + input.to_s
@@ -306,6 +323,11 @@ module Liquid
     def to_date(obj)
       return obj if obj.respond_to?(:strftime)
 
+      if obj.is_a?(String)
+        return nil if obj.empty?
+        obj = obj.downcase
+      end
+
       case obj
       when 'now'.freeze, 'today'.freeze
         Time.now
@@ -313,8 +335,6 @@ module Liquid
         Time.at(obj.to_i)
       when String
         Time.parse(obj)
-      else
-        nil
       end
     rescue ArgumentError
       nil
@@ -344,6 +364,10 @@ module Liquid
         to_a.join(glue)
       end
 
+      def concat(args)
+        to_a.concat args
+      end
+
       def reverse
         reverse_each.to_a
       end

lib/liquid/strainer.rb

@@ -1,19 +1,19 @@
 require 'set'
 
 module Liquid
-
   # Strainer is the parent class for the filters system.
   # New filters are mixed into the strainer class which is then instantiated for each liquid template render run.
   #
   # The Strainer only allows method calls defined in filters given to it via Strainer.global_filter,
   # Context#add_filters or Template.register_filter
   class Strainer #:nodoc:
-    @@filters = []
-    @@known_filters = Set.new
-    @@known_methods = Set.new
+    @@global_strainer = Class.new(Strainer) do
+      @filter_methods = Set.new
+    end
     @@strainer_class_cache = Hash.new do |hash, filters|
-      hash[filters] = Class.new(Strainer) do
-        filters.each { |f| include f }
+      hash[filters] = Class.new(@@global_strainer) do
+        @filter_methods = @@global_strainer.filter_methods.dup
+        filters.each { |f| add_filter(f) }
       end
     end
 
@@ -21,43 +21,46 @@ module Liquid
       @context = context
     end
 
-    def self.global_filter(filter)
-      raise ArgumentError, "Passed filter is not a module" unless filter.is_a?(Module)
-      add_known_filter(filter)
-      @@filters << filter unless @@filters.include?(filter)
+    class << self
+      attr_reader :filter_methods
     end
 
-    def self.add_known_filter(filter)
-      unless @@known_filters.include?(filter)
-        @@method_blacklist ||= Set.new(Strainer.instance_methods.map(&:to_s))
-        new_methods = filter.instance_methods.map(&:to_s)
-        new_methods.reject!{ |m| @@method_blacklist.include?(m) }
-        @@known_methods.merge(new_methods)
-        @@known_filters.add(filter)
+    def self.add_filter(filter)
+      raise ArgumentError, "Expected module but got: #{f.class}" unless filter.is_a?(Module)
+      unless self.class.include?(filter)
+        send(:include, filter)
+        @filter_methods.merge(filter.public_instance_methods.map(&:to_s))
       end
     end
 
-    def self.strainer_class_cache
-      @@strainer_class_cache
+    def self.global_filter(filter)
+      @@global_strainer.add_filter(filter)
+    end
+
+    def self.invokable?(method)
+      @filter_methods.include?(method.to_s)
     end
 
     def self.create(context, filters = [])
-      filters = @@filters + filters
-      strainer_class_cache[filters].new(context)
+      @@strainer_class_cache[filters].new(context)
     end
 
     def invoke(method, *args)
-      if invokable?(method)
-        send(method, *args)
+      if self.class.invokable?(method)
+        begin
+          send(method, *args)
+        rescue ::ArgumentError => e
+          raise Liquid::ArgumentError.new(e.message)
+        rescue Liquid::Error
+          raise
+        rescue ::StandardError => exception
+          error = Liquid::FilterError.new(exception.message)
+          error.original_exception = exception
+          raise error
+        end
       else
         args.first
       end
-    rescue ::ArgumentError => e
-      raise Liquid::ArgumentError.new(e.message)
-    end
-
-    def invokable?(method)
-      @@known_methods.include?(method.to_s) && respond_to?(method)
     end
   end
 end

lib/liquid/tag.rb

@@ -20,7 +20,7 @@ module Liquid
       @options    = options
     end
 
-    def parse(tokens)
+    def parse(_tokens)
     end
 
     def raw
@@ -31,7 +31,7 @@ module Liquid
       self.class.name.downcase
     end
 
-    def render(context)
+    def render(_context)
       ''.freeze
     end
 

lib/liquid/tags/assign.rb

@@ -1,5 +1,4 @@
 module Liquid
-
   # Assign sets a variable in your template.
   #
   #   {% assign foo = 'monkey' %}
@@ -15,7 +14,7 @@ module Liquid
       super
       if markup =~ Syntax
         @to = $1
-        @from = Variable.new($2,options)
+        @from = Variable.new($2, options)
         @from.line_number = line_number
       else
         raise SyntaxError.new options[:locale].t("errors.syntax.assign".freeze)
@@ -25,7 +24,10 @@ module Liquid
     def render(context)
       val = @from.render(context)
       context.scopes.last[@to] = val
-      context.increment_used_resources(:assign_score_current, val)
+
+      inc = val.instance_of?(String) || val.instance_of?(Array) || val.instance_of?(Hash) ? val.length : 1
+      context.resource_limits.assign_score += inc
+
       ''.freeze
     end
 

lib/liquid/tags/break.rb

@@ -1,5 +1,4 @@
 module Liquid
-
   # Break tag to be used to break out of a for loop.
   #
   # == Basic Usage:
@@ -10,11 +9,9 @@ module Liquid
   #    {% endfor %}
   #
   class Break < Tag
-
     def interrupt
       BreakInterrupt.new
     end
-
   end
 
   Template.register_tag('break'.freeze, Break)

lib/liquid/tags/capture.rb

@@ -11,7 +11,7 @@ module Liquid
   # in a sidebar or footer.
   #
   class Capture < Block
-    Syntax = /(\w+)/
+    Syntax = /(#{VariableSignature}+)/o
 
     def initialize(tag_name, markup, options)
       super
@@ -25,7 +25,7 @@ module Liquid
     def render(context)
       output = super
       context.scopes.last[@to] = output
-      context.increment_used_resources(:assign_score_current, output)
+      context.resource_limits.assign_score += output.length
       ''.freeze
     end
 

lib/liquid/tags/case.rb

@@ -8,18 +8,24 @@ module Liquid
       @blocks = []
 
       if markup =~ Syntax
-        @left = $1
+        @left = Expression.parse($1)
       else
         raise SyntaxError.new(options[:locale].t("errors.syntax.case".freeze))
       end
     end
 
+    def parse(tokens)
+      body = BlockBody.new
+      while more = parse_body(body, tokens)
+        body = @blocks.last.attachment
+      end
+    end
+
     def nodelist
-      @blocks.map(&:attachment).flatten
+      @blocks.map(&:attachment)
     end
 
     def unknown_tag(tag, markup, tokens)
-      @nodelist = []
       case tag
       when 'when'.freeze
         record_when_condition(markup)
@@ -37,10 +43,10 @@ module Liquid
         output = ''
         @blocks.each do |block|
           if block.else?
-            return render_all(block.attachment, context) if execute_else_block
+            return block.attachment.render(context) if execute_else_block
           elsif block.evaluate(context)
             execute_else_block = false
-            output << render_all(block.attachment, context)
+            output << block.attachment.render(context)
           end
         end
         output
@@ -50,27 +56,28 @@ module Liquid
     private
 
     def record_when_condition(markup)
+      body = BlockBody.new
+
       while markup
-        # Create a new nodelist and assign it to the new block
-        if not markup =~ WhenSyntax
+        unless markup =~ WhenSyntax
           raise SyntaxError.new(options[:locale].t("errors.syntax.case_invalid_when".freeze))
         end
 
         markup = $2
 
-        block = Condition.new(@left, '=='.freeze, $1)
-        block.attach(@nodelist)
-        @blocks.push(block)
+        block = Condition.new(@left, '=='.freeze, Expression.parse($1))
+        block.attach(body)
+        @blocks << block
       end
     end
 
     def record_else_condition(markup)
-      if not markup.strip.empty?
+      unless markup.strip.empty?
         raise SyntaxError.new(options[:locale].t("errors.syntax.case_invalid_else".freeze))
       end
 
       block = ElseCondition.new
-      block.attach(@nodelist)
+      block.attach(BlockBody.new)
       @blocks << block
     end
   end

lib/liquid/tags/comment.rb

@@ -1,10 +1,10 @@
 module Liquid
   class Comment < Block
-    def render(context)
+    def render(_context)
       ''.freeze
     end
 
-    def unknown_tag(tag, markup, tokens)
+    def unknown_tag(_tag, _markup, _tokens)
     end
 
     def blank?

lib/liquid/tags/cycle.rb

@@ -20,10 +20,10 @@ module Liquid
       case markup
       when NamedSyntax
         @variables = variables_from_string($2)
-        @name = $1
+        @name = Expression.parse($1)
       when SimpleSyntax
         @variables = variables_from_string(markup)
-        @name = "'#{@variables.to_s}'"
+        @name = @variables.to_s
       else
         raise SyntaxError.new(options[:locale].t("errors.syntax.cycle".freeze))
       end
@@ -33,9 +33,9 @@ module Liquid
       context.registers[:cycle] ||= Hash.new(0)
 
       context.stack do
-        key = context[@name]
+        key = context.evaluate(@name)
         iteration = context.registers[:cycle][key]
-        result = context[@variables[iteration]]
+        result = context.evaluate(@variables[iteration])
         iteration += 1
         iteration  = 0  if iteration >= @variables.size
         context.registers[:cycle][key] = iteration
@@ -48,7 +48,7 @@ module Liquid
     def variables_from_string(markup)
       markup.split(',').collect do |var|
         var =~ /\s*(#{QuotedFragment})\s*/o
-        $1 ? $1 : nil
+        $1 ? Expression.parse($1) : nil
       end.compact
     end
   end

lib/liquid/tags/decrement.rb

@@ -1,5 +1,4 @@
 module Liquid
-
   # decrement is used in a place where one needs to insert a counter
   #     into a template, and needs the counter to survive across
   #     multiple instantiations of the template.
@@ -26,12 +25,10 @@ module Liquid
 
     def render(context)
       value = context.environments.first[@variable] ||= 0
-      value = value - 1
+      value -= 1
       context.environments.first[@variable] = value
       value.to_s
     end
-
-    private
   end
 
   Template.register_tag('decrement'.freeze, Decrement)

lib/liquid/tags/for.rb

@@ -1,5 +1,4 @@
 module Liquid
-
   # "For" iterates over an array or collection.
   # Several useful variables are available to you within the loop.
   #
@@ -42,6 +41,7 @@ module Liquid
   #                   where 0 is the last item.
   # forloop.first:: Returns true if the item is the first item.
   # forloop.last:: Returns true if the item is the last item.
+  # forloop.parentloop:: Provides access to the parent loop, if present.
   #
   class For < Block
     Syntax = /\A(#{VariableSegment}+)\s+in\s+(#{QuotedFragment}+)\s*(reversed)?/o
@@ -49,38 +49,43 @@ module Liquid
     def initialize(tag_name, markup, options)
       super
       parse_with_selected_parser(markup)
-      @nodelist = @for_block = []
+      @for_block = BlockBody.new
+    end
+
+    def parse(tokens)
+      return unless parse_body(@for_block, tokens)
+      parse_body(@else_block, tokens)
     end
 
     def nodelist
-      if @else_block
-        @for_block + @else_block
-      else
-        @for_block
-      end
+      @else_block ? [@for_block, @else_block] : [@for_block]
     end
 
     def unknown_tag(tag, markup, tokens)
       return super unless tag == 'else'.freeze
-      @nodelist = @else_block = []
+      @else_block = BlockBody.new
     end
 
     def render(context)
-      context.registers[:for] ||= Hash.new(0)
+      for_offsets = context.registers[:for] ||= Hash.new(0)
+      for_stack = context.registers[:for_stack] ||= []
 
-      collection = context[@collection_name]
+      parent_loop = for_stack.last
+      for_stack.push(nil)
+
+      collection = context.evaluate(@collection_name)
       collection = collection.to_a if collection.is_a?(Range)
 
       # Maintains Ruby 1.8.7 String#each behaviour on 1.9
       return render_else(context) unless iterable?(collection)
 
-      from = if @attributes['offset'.freeze] == 'continue'.freeze
-        context.registers[:for][@name].to_i
+      from = if @from == :continue
+        for_offsets[@name].to_i
       else
-        context[@attributes['offset'.freeze]].to_i
+        context.evaluate(@from).to_i
       end
 
-      limit = context[@attributes['limit'.freeze]]
+      limit = context.evaluate(@limit)
       to    = limit ? limit.to_i + from : nil
 
       segment = Utils.slice_collection(collection, from, to)
@@ -94,23 +99,27 @@ module Liquid
       length = segment.length
 
       # Store our progress through the collection for the continue flag
-      context.registers[:for][@name] = from + segment.length
+      for_offsets[@name] = from + segment.length
 
       context.stack do
         segment.each_with_index do |item, index|
           context[@variable_name] = item
-          context['forloop'.freeze] = {
-            'name'.freeze    => @name,
-            'length'.freeze  => length,
-            'index'.freeze   => index + 1,
-            'index0'.freeze  => index,
-            'rindex'.freeze  => length - index,
-            'rindex0'.freeze => length - index - 1,
-            'first'.freeze   => (index == 0),
-            'last'.freeze    => (index == length - 1)
+          loop_vars = {
+            'name'.freeze       => @name,
+            'length'.freeze     => length,
+            'index'.freeze      => index + 1,
+            'index0'.freeze     => index,
+            'rindex'.freeze     => length - index,
+            'rindex0'.freeze    => length - index - 1,
+            'first'.freeze      => (index == 0),
+            'last'.freeze       => (index == length - 1),
+            'parentloop'.freeze => parent_loop
           }
 
-          result << render_all(@for_block, context)
+          context['forloop'.freeze] = loop_vars
+          for_stack[-1] = loop_vars
+
+          result << @for_block.render(context)
 
           # Handle any interrupts if they exist.
           if context.has_interrupt?
@@ -120,7 +129,10 @@ module Liquid
           end
         end
       end
+
       result
+    ensure
+      for_stack.pop
     end
 
     protected
@@ -128,12 +140,12 @@ module Liquid
     def lax_parse(markup)
       if markup =~ Syntax
         @variable_name = $1
-        @collection_name = $2
-        @name = "#{$1}-#{$2}"
+        collection_name = $2
         @reversed = $3
-        @attributes = {}
+        @name = "#{@variable_name}-#{collection_name}"
+        @collection_name = Expression.parse(collection_name)
         markup.scan(TagAttributes) do |key, value|
-          @attributes[key] = value
+          set_attribute(key, value)
         end
       else
         raise SyntaxError.new(options[:locale].t("errors.syntax.for".freeze))
@@ -144,26 +156,38 @@ module Liquid
       p = Parser.new(markup)
       @variable_name = p.consume(:id)
       raise SyntaxError.new(options[:locale].t("errors.syntax.for_invalid_in".freeze))  unless p.id?('in'.freeze)
-      @collection_name = p.expression
-      @name = "#{@variable_name}-#{@collection_name}"
+      collection_name = p.expression
+      @name = "#{@variable_name}-#{collection_name}"
+      @collection_name = Expression.parse(collection_name)
       @reversed = p.id?('reversed'.freeze)
 
-      @attributes = {}
       while p.look(:id) && p.look(:colon, 1)
         unless attribute = p.id?('limit'.freeze) || p.id?('offset'.freeze)
           raise SyntaxError.new(options[:locale].t("errors.syntax.for_invalid_attribute".freeze))
         end
         p.consume
-        val = p.expression
-        @attributes[attribute] = val
+        set_attribute(attribute, p.expression)
       end
       p.consume(:end_of_string)
     end
 
     private
 
+    def set_attribute(key, expr)
+      case key
+      when 'offset'.freeze
+        @from = if expr == 'continue'.freeze
+          :continue
+        else
+          Expression.parse(expr)
+        end
+      when 'limit'.freeze
+        @limit = Expression.parse(expr)
+      end
+    end
+
     def render_else(context)
-      return @else_block ? [render_all(@else_block, context)] : ''.freeze
+      @else_block ? @else_block.render(context) : ''.freeze
     end
 
     def iterable?(collection)

lib/liquid/tags/if.rb

@@ -20,8 +20,13 @@ module Liquid
       push_block('if'.freeze, markup)
     end
 
+    def parse(tokens)
+      while parse_body(@blocks.last.attachment, tokens)
+      end
+    end
+
     def nodelist
-      @blocks.map(&:attachment).flatten
+      @blocks.map(&:attachment)
     end
 
     def unknown_tag(tag, markup, tokens)
@@ -36,7 +41,7 @@ module Liquid
       context.stack do
         @blocks.each do |block|
           if block.evaluate(context)
-            return render_all(block.attachment, context)
+            return block.attachment.render(context)
           end
         end
         ''.freeze
@@ -45,61 +50,61 @@ module Liquid
 
     private
 
-      def push_block(tag, markup)
-        block = if tag == 'else'.freeze
-          ElseCondition.new
-        else
-          parse_with_selected_parser(markup)
-        end
-
-        @blocks.push(block)
-        @nodelist = block.attach(Array.new)
+    def push_block(tag, markup)
+      block = if tag == 'else'.freeze
+        ElseCondition.new
+      else
+        parse_with_selected_parser(markup)
       end
 
-      def lax_parse(markup)
-        expressions = markup.scan(ExpressionsAndOperators).reverse
-        raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless expressions.shift =~ Syntax
+      @blocks.push(block)
+      block.attach(BlockBody.new)
+    end
 
-        condition = Condition.new($1, $2, $3)
+    def lax_parse(markup)
+      expressions = markup.scan(ExpressionsAndOperators)
+      raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless expressions.pop =~ Syntax
 
-        while not expressions.empty?
-          operator = (expressions.shift).to_s.strip
+      condition = Condition.new(Expression.parse($1), $2, Expression.parse($3))
 
-          raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless expressions.shift.to_s =~ Syntax
+      until expressions.empty?
+        operator = expressions.pop.to_s.strip
 
-          new_condition = Condition.new($1, $2, $3)
-          raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless BOOLEAN_OPERATORS.include?(operator)
-          new_condition.send(operator, condition)
-          condition = new_condition
-        end
+        raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless expressions.pop.to_s =~ Syntax
 
-        condition
+        new_condition = Condition.new(Expression.parse($1), $2, Expression.parse($3))
+        raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless BOOLEAN_OPERATORS.include?(operator)
+        new_condition.send(operator, condition)
+        condition = new_condition
       end
 
-      def strict_parse(markup)
-        p = Parser.new(markup)
+      condition
+    end
 
-        condition = parse_comparison(p)
+    def strict_parse(markup)
+      p = Parser.new(markup)
 
-        while op = (p.id?('and'.freeze) || p.id?('or'.freeze))
-          new_cond = parse_comparison(p)
-          new_cond.send(op, condition)
-          condition = new_cond
-        end
-        p.consume(:end_of_string)
+      condition = parse_comparison(p)
 
-        condition
+      while op = (p.id?('and'.freeze) || p.id?('or'.freeze))
+        new_cond = parse_comparison(p)
+        new_cond.send(op, condition)
+        condition = new_cond
       end
+      p.consume(:end_of_string)
 
-      def parse_comparison(p)
-        a = p.expression
-        if op = p.consume?(:comparison)
-          b = p.expression
-          Condition.new(a, op, b)
-        else
-          Condition.new(a)
-        end
+      condition
+    end
+
+    def parse_comparison(p)
+      a = Expression.parse(p.expression)
+      if op = p.consume?(:comparison)
+        b = Expression.parse(p.expression)
+        Condition.new(a, op, b)
+      else
+        Condition.new(a)
       end
+    end
   end
 
   Template.register_tag('if'.freeze, If)

lib/liquid/tags/ifchanged.rb

@@ -1,10 +1,8 @@
 module Liquid
   class Ifchanged < Block
-
     def render(context)
       context.stack do
-
-        output = render_all(@nodelist, context)
+        output = super
 
         if output != context.registers[:ifchanged]
           context.registers[:ifchanged] = output

lib/liquid/tags/include.rb

@@ -1,5 +1,4 @@
 module Liquid
-
   # Include allows templates to relate with other templates
   #
   # Simply include another template:
@@ -22,12 +21,15 @@ module Liquid
 
       if markup =~ Syntax
 
-        @template_name = $1
-        @variable_name = $3
-        @attributes    = {}
+        template_name = $1
+        variable_name = $3
+
+        @variable_name_expr = variable_name ? Expression.parse(variable_name) : nil
+        @template_name_expr = Expression.parse(template_name)
+        @attributes = {}
 
         markup.scan(TagAttributes) do |key, value|
-          @attributes[key] = value
+          @attributes[key] = Expression.parse(value)
         end
 
       else
@@ -35,19 +37,26 @@ module Liquid
       end
     end
 
-    def parse(tokens)
+    def parse(_tokens)
     end
 
     def render(context)
       partial = load_cached_partial(context)
-      variable = context[@variable_name || @template_name[1..-2]]
+
+      template_name = context.evaluate(@template_name_expr)
+      context_variable_name = template_name.split('/'.freeze).last
+
+      variable = if @variable_name_expr
+        context.evaluate(@variable_name_expr)
+      else
+        context.find_variable(template_name)
+      end
 
       context.stack do
         @attributes.each do |key, value|
-          context[key] = context[value]
+          context[key] = context.evaluate(value)
         end
 
-        context_variable_name = @template_name[1..-2].split('/'.freeze).last
         if variable.is_a?(Array)
           variable.collect do |var|
             context[context_variable_name] = var
@@ -61,43 +70,36 @@ module Liquid
     end
 
     private
-      def load_cached_partial(context)
-        cached_partials = context.registers[:cached_partials] || {}
-        template_name = context[@template_name]
 
-        if cached = cached_partials[template_name]
-          return cached
-        end
-        source = read_template_from_file_system(context)
-        partial = Liquid::Template.parse(source, pass_options)
-        cached_partials[template_name] = partial
-        context.registers[:cached_partials] = cached_partials
-        partial
+    def load_cached_partial(context)
+      cached_partials = context.registers[:cached_partials] || {}
+      template_name = context.evaluate(@template_name_expr)
+
+      if cached = cached_partials[template_name]
+        return cached
       end
+      source = read_template_from_file_system(context)
+      partial = Liquid::Template.parse(source, pass_options)
+      cached_partials[template_name] = partial
+      context.registers[:cached_partials] = cached_partials
+      partial
+    end
 
-      def read_template_from_file_system(context)
-        file_system = context.registers[:file_system] || Liquid::Template.file_system
+    def read_template_from_file_system(context)
+      file_system = context.registers[:file_system] || Liquid::Template.file_system
 
-        # make read_template_file call backwards-compatible.
-        case file_system.method(:read_template_file).arity
-        when 1
-          file_system.read_template_file(context[@template_name])
-        when 2
-          file_system.read_template_file(context[@template_name], context)
-        else
-          raise ArgumentError, "file_system.read_template_file expects two parameters: (template_name, context)"
-        end
-      end
-
-      def pass_options
-        dont_pass = @options[:include_options_blacklist]
-        return {locale: @options[:locale]} if dont_pass == true
-        opts = @options.merge(included: true, include_options_blacklist: false)
-        if dont_pass.is_a?(Array)
-          dont_pass.each {|o| opts.delete(o)}
-        end
-        opts
+      file_system.read_template_file(context.evaluate(@template_name_expr))
+    end
+
+    def pass_options
+      dont_pass = @options[:include_options_blacklist]
+      return { locale: @options[:locale] } if dont_pass == true
+      opts = @options.merge(included: true, include_options_blacklist: false)
+      if dont_pass.is_a?(Array)
+        dont_pass.each { |o| opts.delete(o) }
       end
+      opts
+    end
   end
 
   Template.register_tag('include'.freeze, Include)

lib/liquid/tags/raw.rb

@@ -3,19 +3,27 @@ module Liquid
     FullTokenPossiblyInvalid = /\A(.*)#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}\z/om
 
     def parse(tokens)
-      @nodelist ||= []
-      @nodelist.clear
+      @body = ''
       while token = tokens.shift
         if token =~ FullTokenPossiblyInvalid
-          @nodelist << $1 if $1 != "".freeze
-          if block_delimiter == $2
-            end_tag
-            return
-          end
+          @body << $1 if $1 != "".freeze
+          return if block_delimiter == $2
         end
-        @nodelist << token if not token.empty?
+        @body << token unless token.empty?
       end
     end
+
+    def render(_context)
+      @body
+    end
+
+    def nodelist
+      [@body]
+    end
+
+    def blank?
+      @body.empty?
+    end
   end
 
   Template.register_tag('raw'.freeze, Raw)

lib/liquid/tags/table_row.rb

@@ -6,10 +6,10 @@ module Liquid
       super
       if markup =~ Syntax
         @variable_name = $1
-        @collection_name = $2
+        @collection_name = Expression.parse($2)
         @attributes = {}
         markup.scan(TagAttributes) do |key, value|
-          @attributes[key] = value
+          @attributes[key] = Expression.parse(value)
         end
       else
         raise SyntaxError.new(options[:locale].t("errors.syntax.table_row".freeze))
@@ -17,23 +17,22 @@ module Liquid
     end
 
     def render(context)
-      collection = context[@collection_name] or return ''.freeze
+      collection = context.evaluate(@collection_name) or return ''.freeze
 
-      from = @attributes['offset'.freeze] ? context[@attributes['offset'.freeze]].to_i : 0
-      to = @attributes['limit'.freeze] ? from + context[@attributes['limit'.freeze]].to_i : nil
+      from = @attributes.key?('offset'.freeze) ? context.evaluate(@attributes['offset'.freeze]).to_i : 0
+      to = @attributes.key?('limit'.freeze) ? from + context.evaluate(@attributes['limit'.freeze]).to_i : nil
 
       collection = Utils.slice_collection(collection, from, to)
 
       length = collection.length
 
-      cols = context[@attributes['cols'.freeze]].to_i
+      cols = context.evaluate(@attributes['cols'.freeze]).to_i
 
       row = 1
       col = 0
 
       result = "<tr class=\"row1\">\n"
       context.stack do
-
         collection.each_with_index do |item, index|
           context[@variable_name] = item
           context['tablerowloop'.freeze] = {
@@ -42,7 +41,6 @@ module Liquid
             'index0'.freeze    => index,
             'col'.freeze       => col + 1,
             'col0'.freeze      => col,
-            'index0'.freeze    => index,
             'rindex'.freeze    => length - index,
             'rindex0'.freeze   => length - index - 1,
             'first'.freeze     => (index == 0),
@@ -51,17 +49,15 @@ module Liquid
             'col_last'.freeze  => (col == cols - 1)
           }
 
-
           col += 1
 
-          result << "<td class=\"col#{col}\">" << render_all(@nodelist, context) << '</td>'
+          result << "<td class=\"col#{col}\">" << super << '</td>'
 
-          if col == cols and (index != length - 1)
+          if col == cols && (index != length - 1)
             col  = 0
             row += 1
             result << "</tr>\n<tr class=\"row#{row}\">"
           end
-
         end
       end
       result << "</tr>\n"

lib/liquid/tags/unless.rb

@@ -1,24 +1,23 @@
-require File.dirname(__FILE__) + '/if'
+require_relative 'if'
 
 module Liquid
   # Unless is a conditional just like 'if' but works on the inverse logic.
   #
-  #   {% unless x < 0 %} x is greater than zero {% end %}
+  #   {% unless x < 0 %} x is greater than zero {% endunless %}
   #
   class Unless < If
     def render(context)
       context.stack do
-
         # First condition is interpreted backwards ( if not )
         first_block = @blocks.first
         unless first_block.evaluate(context)
-          return render_all(first_block.attachment, context)
+          return first_block.attachment.render(context)
         end
 
         # After the first condition unless works just like if
         @blocks[1..-1].each do |block|
           if block.evaluate(context)
-            return render_all(block.attachment, context)
+            return block.attachment.render(context)
           end
         end
 

lib/liquid/template.rb

@@ -1,5 +1,4 @@
 module Liquid
-
   # Templates are central to liquid.
   # Interpretating templates is a two step process. First you compile the
   # source code you got. During compile time some extensive error checking is performed.
@@ -15,10 +14,12 @@ module Liquid
   #
   class Template
     DEFAULT_OPTIONS = {
-      :locale => I18n.new
+      locale: I18n.new
     }
 
-    attr_accessor :root, :resource_limits
+    attr_accessor :root, :render_errors
+    attr_reader :resource_limits
+
     @@file_system = BlankFileSystem.new
 
     class TagRegistry
@@ -60,6 +61,12 @@ module Liquid
       # :strict will enforce correct syntax.
       attr_writer :error_mode
 
+      # Sets how strict the taint checker should be.
+      # :lax is the default, and ignores the taint flag completely
+      # :warn adds a warning, but does not interrupt the rendering
+      # :error raises an error when tainted output is used
+      attr_writer :taint_mode
+
       def file_system
         @@file_system
       end
@@ -80,6 +87,10 @@ module Liquid
         @error_mode || :lax
       end
 
+      def taint_mode
+        @taint_mode || :lax
+      end
+
       # Pass a module with filter methods which should be available
       # to all liquid views. Good for registering the standard library
       def register_filter(mod)
@@ -100,7 +111,7 @@ module Liquid
     end
 
     def initialize
-      @resource_limits = self.class.default_resource_limits.dup
+      @resource_limits = ResourceLimits.new(self.class.default_resource_limits)
     end
 
     # Parse source code.
@@ -172,12 +183,14 @@ module Liquid
         raise ArgumentError, "Expected Hash or Liquid::Context as parameter"
       end
 
+      context.render_errors = self.render_errors unless self.render_errors.nil?
+
       case args.last
       when Hash
         options = args.pop
 
         if options[:registers].is_a?(Hash)
-          self.registers.merge!(options[:registers])
+          registers.merge!(options[:registers])
         end
 
         if options[:filters]
@@ -193,6 +206,9 @@ module Liquid
         context.add_filters(args.pop)
       end
 
+      # Retrying a render resets resource usage
+      context.resource_limits.reset
+
       begin
         # render the nodelist.
         # for performance reasons we get an array back here. join will make a string out of it.
@@ -222,7 +238,7 @@ module Liquid
       tokens = calculate_line_numbers(source.split(TemplateParser))
 
       # removes the rogue empty element at the beginning of the array
-      tokens.shift if tokens[0] and tokens[0].empty?
+      tokens.shift if tokens[0] && tokens[0].empty?
 
       tokens
     end
@@ -240,6 +256,8 @@ module Liquid
 
     def with_profiling
       if @profiling && !@options[:included]
+        raise "Profiler not loaded, require 'liquid/profiler' first" unless defined?(Liquid::Profiler)
+
         @profiler = Profiler.new
         @profiler.start
 

lib/liquid/utils.rb

@@ -1,8 +1,7 @@
 module Liquid
   module Utils
-
     def self.slice_collection(collection, from, to)
-      if (from != 0 || to != nil) && collection.respond_to?(:load_slice)
+      if (from != 0 || !to.nil?) && collection.respond_to?(:load_slice)
         collection.load_slice(from, to)
       else
         slice_collection_using_each(collection, from, to)
@@ -21,7 +20,6 @@ module Liquid
       return [collection] if non_blank_string?(collection)
 
       collection.each do |item|
-
         if to && to <= index
           break
         end

lib/liquid/variable.rb

@@ -1,5 +1,4 @@
 module Liquid
-
   # Holds variables. Variables are only loaded "just in time"
   # and are not evaluated as part of the render stage
   #
@@ -12,7 +11,6 @@ module Liquid
   #
   class Variable
     FilterParser = /(?:\s+|#{QuotedFragment}|#{ArgumentSeparator})+/o
-    EasyParse = /\A *(\w+(?:\.\w+)*) *\z/
     attr_accessor :filters, :name, :warnings
     attr_accessor :line_number
     include ParserSwitching
@@ -35,37 +33,32 @@ module Liquid
 
     def lax_parse(markup)
       @filters = []
-      if markup =~ /\s*(#{QuotedFragment})(.*)/om
-        @name = Regexp.last_match(1)
-        if Regexp.last_match(2) =~ /#{FilterSeparator}\s*(.*)/om
-          filters = Regexp.last_match(1).scan(FilterParser)
-          filters.each do |f|
-            if f =~ /\w+/
-              filtername = Regexp.last_match(0)
-              filterargs = f.scan(/(?:#{FilterArgumentSeparator}|#{ArgumentSeparator})\s*((?:\w+\s*\:\s*)?#{QuotedFragment})/o).flatten
-              @filters << [filtername, filterargs]
-            end
+      return unless markup =~ /(#{QuotedFragment})(.*)/om
+
+      name_markup = $1
+      filter_markup = $2
+      @name = Expression.parse(name_markup)
+      if filter_markup =~ /#{FilterSeparator}\s*(.*)/om
+        filters = $1.scan(FilterParser)
+        filters.each do |f|
+          if f =~ /\w+/
+            filtername = Regexp.last_match(0)
+            filterargs = f.scan(/(?:#{FilterArgumentSeparator}|#{ArgumentSeparator})\s*((?:\w+\s*\:\s*)?#{QuotedFragment})/o).flatten
+            @filters << parse_filter_expressions(filtername, filterargs)
           end
         end
       end
     end
 
     def strict_parse(markup)
-      # Very simple valid cases
-      if markup =~ EasyParse
-        @name = $1
-        @filters = []
-        return
-      end
-
       @filters = []
       p = Parser.new(markup)
-      # Could be just filters with no input
-      @name = p.look(:pipe) ? ''.freeze : p.expression
+
+      @name = Expression.parse(p.expression)
       while p.consume?(:pipe)
         filtername = p.consume(:id)
         filterargs = p.consume?(:colon) ? parse_filterargs(p) : []
-        @filters << [filtername, filterargs]
+        @filters << parse_filter_expressions(filtername, filterargs)
       end
       p.consume(:end_of_string)
     end
@@ -74,29 +67,56 @@ module Liquid
       # first argument
       filterargs = [p.argument]
       # followed by comma separated others
-      while p.consume?(:comma)
-        filterargs << p.argument
-      end
+      filterargs << p.argument while p.consume?(:comma)
       filterargs
     end
 
     def render(context)
-      return ''.freeze if @name.nil?
-      @filters.inject(context[@name]) do |output, filter|
-        filterargs = []
-        keyword_args = {}
-        filter[1].to_a.each do |a|
-          if matches = a.match(/\A#{TagAttributes}\z/o)
-            keyword_args[matches[1]] = context[matches[2]]
-          else
-            filterargs << context[a]
-          end
+      @filters.inject(context.evaluate(@name)) do |output, (filter_name, filter_args, filter_kwargs)|
+        filter_args = evaluate_filter_expressions(context, filter_args, filter_kwargs)
+        output = context.invoke(filter_name, output, *filter_args)
+      end.tap{ |obj| taint_check(obj) }
+    end
+
+    private
+
+    def parse_filter_expressions(filter_name, unparsed_args)
+      filter_args = []
+      keyword_args = {}
+      unparsed_args.each do |a|
+        if matches = a.match(/\A#{TagAttributes}\z/o)
+          keyword_args[matches[1]] = Expression.parse(matches[2])
+        else
+          filter_args << Expression.parse(a)
         end
-        filterargs << keyword_args unless keyword_args.empty?
-        begin
-          output = context.invoke(filter[0], output, *filterargs)
-        rescue FilterNotFound
-          raise FilterNotFound, "Error - filter '#{filter[0]}' in '#{@markup.strip}' could not be found."
+      end
+      result = [filter_name, filter_args]
+      result << keyword_args unless keyword_args.empty?
+      result
+    end
+
+    def evaluate_filter_expressions(context, filter_args, filter_kwargs)
+      parsed_args = filter_args.map{ |expr| context.evaluate(expr) }
+      if filter_kwargs
+        parsed_kwargs = {}
+        filter_kwargs.each do |key, expr|
+          parsed_kwargs[key] = context.evaluate(expr)
+        end
+        parsed_args << parsed_kwargs
+      end
+      parsed_args
+    end
+
+    def taint_check(obj)
+      if obj.tainted?
+        @markup =~ QuotedFragment
+        name = Regexp.last_match(0)
+        case Template.taint_mode
+        when :warn
+          @warnings ||= []
+          @warnings << "variable '#{name}' is tainted and was not escaped"
+        when :error
+          raise TaintedError, "Error - variable '#{name}' is tainted and was not escaped"
         end
       end
     end

lib/liquid/variable_lookup.rb

@@ -3,6 +3,8 @@ module Liquid
     SQUARE_BRACKETED = /\A\[(.*)\]\z/m
     COMMAND_METHODS = ['size'.freeze, 'first'.freeze, 'last'.freeze]
 
+    attr_reader :name, :lookups
+
     def self.parse(markup)
       new(markup)
     end
@@ -39,8 +41,8 @@ module Liquid
         # If object is a hash- or array-like object we look for the
         # presence of the key and if its available we return it
         if object.respond_to?(:[]) &&
-          ((object.respond_to?(:has_key?) && object.has_key?(key)) ||
-           (object.respond_to?(:fetch) && key.is_a?(Integer)))
+            ((object.respond_to?(:has_key?) && object.has_key?(key)) ||
+             (object.respond_to?(:fetch) && key.is_a?(Integer)))
 
           # if its a proc we will replace the entry with the proc
           res = context.lookup_and_evaluate(object, key)
@@ -64,5 +66,15 @@ module Liquid
 
       object
     end
+
+    def ==(other)
+      self.class == other.class && state == other.state
+    end
+
+    protected
+
+    def state
+      [@name, @lookups, @command_flags]
+    end
   end
 end

lib/liquid/version.rb

@@ -1,4 +1,4 @@
 # encoding: utf-8
 module Liquid
-  VERSION = "3.0.0"
+  VERSION = "4.0.0.alpha"
 end

liquid.gemspec

@@ -1,6 +1,6 @@
 # encoding: utf-8
 lib = File.expand_path('../lib/', __FILE__)
-$:.unshift lib unless $:.include?(lib)
+$LOAD_PATH.unshift lib unless $LOAD_PATH.include?(lib)
 
 require "liquid/version"
 
@@ -9,11 +9,11 @@ Gem::Specification.new do |s|
   s.version     = Liquid::VERSION
   s.platform    = Gem::Platform::RUBY
   s.summary     = "A secure, non-evaling end user template engine with aesthetic markup."
-  s.authors     = ["Tobias Luetke"]
+  s.authors     = ["Tobias Lütke"]
   s.email       = ["tobi@leetsoft.com"]
   s.homepage    = "http://www.liquidmarkup.org"
   s.license     = "MIT"
-  #s.description = "A secure, non-evaling end user template engine with aesthetic markup."
+  # s.description = "A secure, non-evaling end user template engine with aesthetic markup."
 
   s.required_rubygems_version = ">= 1.3.7"
 

performance/benchmark.rb

@@ -1,5 +1,5 @@
 require 'benchmark/ips'
-require File.dirname(__FILE__) + '/theme_runner'
+require_relative 'theme_runner'
 
 Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
 profiler = ThemeRunner.new

performance/profile.rb

@@ -1,17 +1,24 @@
 require 'stackprof' rescue fail("install stackprof extension/gem")
-require File.dirname(__FILE__) + '/theme_runner'
+require_relative 'theme_runner'
 
 Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
 profiler = ThemeRunner.new
 profiler.run
 
 [:cpu, :object].each do |profile_type|
-  puts "Profiling in #{profile_type.to_s} mode..."
+  puts "Profiling in #{profile_type} mode..."
   results = StackProf.run(mode: profile_type) do
-    100.times do
+    200.times do
       profiler.run
     end
   end
+
+  if profile_type == :cpu && graph_filename = ENV['GRAPH_FILENAME']
+    File.open(graph_filename, 'w') do |f|
+      StackProf::Report.new(results).print_graphviz(nil, f)
+    end
+  end
+
   StackProf::Report.new(results).print_text(false, 20)
   File.write(ENV['FILENAME'] + "." + profile_type.to_s, Marshal.dump(results)) if ENV['FILENAME']
 end

performance/shopify/comment_form.rb

@@ -28,6 +28,6 @@ class CommentForm < Liquid::Block
   end
 
   def wrap_in_form(article, input)
-    %Q{<form id="article-#{article.id}-comment-form" class="comment-form" method="post" action="">\n#{input}\n</form>}
+    %(<form id="article-#{article.id}-comment-form" class="comment-form" method="post" action="">\n#{input}\n</form>)
   end
 end

performance/shopify/database.rb

@@ -5,7 +5,7 @@ module Database
   # to liquid as assigns. All this is based on Shopify
   def self.tables
     @tables ||= begin
-      db = YAML.load_file(File.dirname(__FILE__) + '/vision.database.yml')
+      db = YAML.load_file("#{__dir__}/vision.database.yml")
 
       # From vision source
       db['products'].each do |product|
@@ -39,7 +39,7 @@ module Database
   end
 end
 
-if __FILE__ == $0
+if __FILE__ == $PROGRAM_NAME
   p Database.tables['collections']['frontpage'].keys
-  #p Database.tables['blog']['articles']
+  # p Database.tables['blog']['articles']
 end

performance/shopify/json_filter.rb

@@ -1,9 +1,7 @@
 require 'json'
 
 module JsonFilter
-
   def json(object)
-    JSON.dump(object.reject {|k,v| k == "collections" })
+    JSON.dump(object.reject { |k, v| k == "collections" })
   end
-
 end

performance/shopify/liquid.rb

@@ -1,13 +1,13 @@
-$:.unshift File.dirname(__FILE__) + '/../../lib'
-require File.dirname(__FILE__) + '/../../lib/liquid'
+$:.unshift __dir__ + '/../../lib'
+require_relative '../../lib/liquid'
 
-require File.dirname(__FILE__) + '/comment_form'
-require File.dirname(__FILE__) + '/paginate'
-require File.dirname(__FILE__) + '/json_filter'
-require File.dirname(__FILE__) + '/money_filter'
-require File.dirname(__FILE__) + '/shop_filter'
-require File.dirname(__FILE__) + '/tag_filter'
-require File.dirname(__FILE__) + '/weight_filter'
+require_relative 'comment_form'
+require_relative 'paginate'
+require_relative 'json_filter'
+require_relative 'money_filter'
+require_relative 'shop_filter'
+require_relative 'tag_filter'
+require_relative 'weight_filter'
 
 Liquid::Template.register_tag 'paginate', Paginate
 Liquid::Template.register_tag 'form', CommentForm

performance/shopify/money_filter.rb

@@ -1,13 +1,12 @@
 module MoneyFilter
-
   def money_with_currency(money)
     return '' if money.nil?
-    sprintf("$ %.2f USD", money/100.0)
+    sprintf("$ %.2f USD", money / 100.0)
   end
 
   def money(money)
     return '' if money.nil?
-    sprintf("$ %.2f", money/100.0)
+    sprintf("$ %.2f", money / 100.0)
   end
 
   private

performance/shopify/paginate.rb

@@ -4,8 +4,6 @@ class Paginate < Liquid::Block
   def initialize(tag_name, markup, options)
     super
 
-    @nodelist = []
-
     if markup =~ Syntax
       @collection_name = $1
       @page_size = if $2
@@ -44,23 +42,22 @@ class Paginate < Liquid::Block
       page_count = (collection_size.to_f / @page_size.to_f).to_f.ceil + 1
 
       pagination['items']      = collection_size
-      pagination['pages']      = page_count -1
-      pagination['previous']   = link('&laquo; Previous', current_page-1 )  unless 1 >= current_page
-      pagination['next']       = link('Next &raquo;', current_page+1 )      unless page_count <= current_page+1
+      pagination['pages']      = page_count - 1
+      pagination['previous']   = link('&laquo; Previous', current_page - 1)  unless 1 >= current_page
+      pagination['next']       = link('Next &raquo;', current_page + 1)      unless page_count <= current_page + 1
       pagination['parts']      = []
 
       hellip_break = false
 
       if page_count > 2
-        1.upto(page_count-1) do |page|
-
+        1.upto(page_count - 1) do |page|
           if current_page == page
             pagination['parts'] << no_link(page)
           elsif page == 1
             pagination['parts'] << link(page, page)
-          elsif page == page_count -1
+          elsif page == page_count - 1
             pagination['parts'] << link(page, page)
-          elsif page <= current_page - @attributes['window_size'] or page >= current_page + @attributes['window_size']
+          elsif page <= current_page - @attributes['window_size'] || page >= current_page + @attributes['window_size']
             next if hellip_break
             pagination['parts'] << no_link('&hellip;')
             hellip_break = true
@@ -73,18 +70,18 @@ class Paginate < Liquid::Block
         end
       end
 
-      render_all(@nodelist, context)
+      super
     end
   end
 
   private
 
   def no_link(title)
-    { 'title' => title, 'is_link' => false}
+    { 'title' => title, 'is_link' => false }
   end
 
   def link(title, page)
-    { 'title' => title, 'url' => current_url + "?page=#{page}", 'is_link' => true}
+    { 'title' => title, 'url' => current_url + "?page=#{page}", 'is_link' => true }
   end
 
   def current_url

performance/shopify/shop_filter.rb

@@ -1,5 +1,4 @@
 module ShopFilter
-
   def asset_url(input)
     "/files/1/[shop_id]/[shop_id]/assets/#{input}"
   end
@@ -16,16 +15,16 @@ module ShopFilter
     %(<script src="#{url}" type="text/javascript"></script>)
   end
 
-  def stylesheet_tag(url, media="all")
+  def stylesheet_tag(url, media = "all")
     %(<link href="#{url}" rel="stylesheet" type="text/css"  media="#{media}"  />)
   end
 
-  def link_to(link, url, title="")
-    %|<a href="#{url}" title="#{title}">#{link}</a>|
+  def link_to(link, url, title = "")
+    %(<a href="#{url}" title="#{title}">#{link}</a>)
   end
 
-  def img_tag(url, alt="")
-    %|<img src="#{url}" alt="#{alt}" />|
+  def img_tag(url, alt = "")
+    %(<img src="#{url}" alt="#{alt}" />)
   end
 
   def link_to_vendor(vendor)
@@ -53,7 +52,6 @@ module ShopFilter
   end
 
   def product_img_url(url, style = 'small')
-
     unless url =~ /\Aproducts\/([\w\-\_]+)\.(\w{2,4})/
       raise ArgumentError, 'filter "size" can only be called on product images'
     end
@@ -69,7 +67,6 @@ module ShopFilter
   end
 
   def default_pagination(paginate)
-
     html = []
     html << %(<span class="prev">#{link_to(paginate['previous']['title'], paginate['previous']['url'])}</span>) if paginate['previous']
 
@@ -106,5 +103,4 @@ module ShopFilter
     result.gsub!(/\A-+/, '') if result[0] == '-'
     result
   end
-
 end

performance/shopify/tag_filter.rb

@@ -1,10 +1,9 @@
 module TagFilter
-
   def link_to_tag(label, tag)
     "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tag}\">#{label}</a>"
   end
 
-  def highlight_active_tag(tag, css_class='active')
+  def highlight_active_tag(tag, css_class = 'active')
     if @context['current_tags'].include?(tag)
       "<span class=\"#{css_class}\">#{tag}</span>"
     else
@@ -21,5 +20,4 @@ module TagFilter
     tags = (@context['current_tags'] - [tag]).uniq
     "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tags.join("+")}\">#{label}</a>"
   end
-
 end

performance/shopify/weight_filter.rb

@@ -1,5 +1,4 @@
 module WeightFilter
-
   def weight(grams)
     sprintf("%.2f", grams / 1000)
   end
@@ -7,5 +6,4 @@ module WeightFilter
   def weight_with_unit(grams)
     "#{weight(grams)} kg"
   end
-
 end

performance/theme_runner.rb

@@ -6,18 +6,17 @@
 # Shopify which is likely the biggest user of liquid in the world which something to the tune of several
 # million Template#render calls a day.
 
-require File.dirname(__FILE__) + '/shopify/liquid'
-require File.dirname(__FILE__) + '/shopify/database.rb'
+require_relative 'shopify/liquid'
+require_relative 'shopify/database'
 
 class ThemeRunner
   class FileSystem
-
     def initialize(path)
       @path = path
     end
 
     # Called by Liquid to retrieve a template file
-    def read_template_file(template_path, context)
+    def read_template_file(template_path)
       File.read(@path + '/' + template_path + '.liquid')
     end
   end
@@ -25,7 +24,7 @@ class ThemeRunner
   # Load all templates into memory, do this now so that
   # we don't profile IO.
   def initialize
-    @tests = Dir[File.dirname(__FILE__) + '/tests/**/*.liquid'].collect do |test|
+    @tests = Dir[__dir__ + '/tests/**/*.liquid'].collect do |test|
       next if File.basename(test) == 'theme.liquid'
 
       theme_path = File.dirname(test) + '/theme.liquid'
@@ -38,7 +37,6 @@ class ThemeRunner
     # Dup assigns because will make some changes to them
 
     @tests.each do |liquid, layout, template_name|
-
       tmpl = Liquid::Template.new
       tmpl.parse(liquid)
       tmpl = Liquid::Template.new
@@ -46,20 +44,17 @@ class ThemeRunner
     end
   end
 
-   def run
+  def run
     # Dup assigns because will make some changes to them
     assigns = Database.tables.dup
 
     @tests.each do |liquid, layout, template_name|
-
       # Compute page_tempalte outside of profiler run, uninteresting to profiler
       page_template = File.basename(template_name, File.extname(template_name))
       compile_and_render(liquid, layout, assigns, page_template, template_name)
-
     end
   end
 
-
   def compile_and_render(template, layout, assigns, page_template, template_file)
     tmpl = Liquid::Template.new
     tmpl.assigns['page_title'] = 'Page title'

test/integration/assign_test.rb

@@ -3,26 +3,36 @@ require 'test_helper'
 class AssignTest < Minitest::Test
   include Liquid
 
+  def test_assign_with_hyphen_in_variable_name
+    template_source = <<-END_TEMPLATE
+    {% assign this-thing = 'Print this-thing' %}
+    {{ this-thing }}
+    END_TEMPLATE
+    template = Template.parse(template_source)
+    rendered = template.render!
+    assert_equal "Print this-thing", rendered.strip
+  end
+
   def test_assigned_variable
     assert_template_result('.foo.',
-                           '{% assign foo = values %}.{{ foo[0] }}.',
-                           'values' => %w{foo bar baz})
+      '{% assign foo = values %}.{{ foo[0] }}.',
+      'values' => %w(foo bar baz))
 
     assert_template_result('.bar.',
-                           '{% assign foo = values %}.{{ foo[1] }}.',
-                           'values' => %w{foo bar baz})
+      '{% assign foo = values %}.{{ foo[1] }}.',
+      'values' => %w(foo bar baz))
   end
 
   def test_assign_with_filter
     assert_template_result('.bar.',
-                           '{% assign foo = values | split: "," %}.{{ foo[1] }}.',
-                           'values' => "foo,bar,baz")
+      '{% assign foo = values | split: "," %}.{{ foo[1] }}.',
+      'values' => "foo,bar,baz")
   end
 
   def test_assign_syntax_error
     assert_match_syntax_error(/assign/,
-                       '{% assign foo not values %}.',
-                       'values' => "foo,bar,baz")
+      '{% assign foo not values %}.',
+      'values' => "foo,bar,baz")
   end
 
   def test_assign_uses_error_mode

test/integration/blank_test.rb

@@ -9,7 +9,7 @@ class FoobarTag < Liquid::Tag
 end
 
 class BlankTestFileSystem
-  def read_template_file(template_path, context)
+  def read_template_file(template_path)
     template_path
   end
 end
@@ -31,7 +31,7 @@ class BlankTest < Minitest::Test
   end
 
   def test_new_tags_are_not_blank_by_default
-    assert_template_result(" "*N, wrap_in_for("{% foobar %}"))
+    assert_template_result(" " * N, wrap_in_for("{% foobar %}"))
   end
 
   def test_loops_are_blank
@@ -47,7 +47,7 @@ class BlankTest < Minitest::Test
   end
 
   def test_mark_as_blank_only_during_parsing
-    assert_template_result(" "*(N+1), wrap(" {% if false %} this never happens, but still, this block is not blank {% endif %}"))
+    assert_template_result(" " * (N + 1), wrap(" {% if false %} this never happens, but still, this block is not blank {% endif %}"))
   end
 
   def test_comments_are_blank
@@ -60,9 +60,9 @@ class BlankTest < Minitest::Test
 
   def test_nested_blocks_are_blank_but_only_if_all_children_are
     assert_template_result("", wrap(wrap(" ")))
-    assert_template_result("\n       but this is not "*(N+1),
-      wrap(%q{{% if true %} {% comment %} this is blank {% endcomment %} {% endif %}
-      {% if true %} but this is not {% endif %}}))
+    assert_template_result("\n       but this is not " * (N + 1),
+      wrap('{% if true %} {% comment %} this is blank {% endcomment %} {% endif %}
+      {% if true %} but this is not {% endif %}'))
   end
 
   def test_assigns_are_blank
@@ -76,31 +76,31 @@ class BlankTest < Minitest::Test
 
   def test_whitespace_is_not_blank_if_other_stuff_is_present
     body = "     x "
-    assert_template_result(body*(N+1), wrap(body))
+    assert_template_result(body * (N + 1), wrap(body))
   end
 
   def test_increment_is_not_blank
-    assert_template_result(" 0"*2*(N+1), wrap("{% assign foo = 0 %} {% increment foo %} {% decrement foo %}"))
+    assert_template_result(" 0" * 2 * (N + 1), wrap("{% assign foo = 0 %} {% increment foo %} {% decrement foo %}"))
   end
 
   def test_cycle_is_not_blank
-    assert_template_result("  "*((N+1)/2)+" ", wrap("{% cycle ' ', ' ' %}"))
+    assert_template_result("  " * ((N + 1) / 2) + " ", wrap("{% cycle ' ', ' ' %}"))
   end
 
   def test_raw_is_not_blank
-    assert_template_result("  "*(N+1), wrap(" {% raw %} {% endraw %}"))
+    assert_template_result("  " * (N + 1), wrap(" {% raw %} {% endraw %}"))
   end
 
   def test_include_is_blank
     Liquid::Template.file_system = BlankTestFileSystem.new
-    assert_template_result "foobar"*(N+1), wrap("{% include 'foobar' %}")
-    assert_template_result " foobar "*(N+1), wrap("{% include ' foobar ' %}")
-    assert_template_result "   "*(N+1), wrap(" {% include ' ' %} ")
+    assert_template_result "foobar" * (N + 1), wrap("{% include 'foobar' %}")
+    assert_template_result " foobar " * (N + 1), wrap("{% include ' foobar ' %}")
+    assert_template_result "   " * (N + 1), wrap(" {% include ' ' %} ")
   end
 
   def test_case_is_blank
     assert_template_result("", wrap(" {% assign foo = 'bar' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} {% endcase %} "))
     assert_template_result("", wrap(" {% assign foo = 'else' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} {% endcase %} "))
-    assert_template_result("   x  "*(N+1), wrap(" {% assign foo = 'else' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} x {% endcase %} "))
+    assert_template_result("   x  " * (N + 1), wrap(" {% assign foo = 'else' %} {% case foo %} {% when 'bar' %} {% when 'whatever' %} {% else %} x {% endcase %} "))
   end
 end

test/integration/capture_test.rb

@@ -7,6 +7,16 @@ class CaptureTest < Minitest::Test
     assert_template_result("test string", "{% capture 'var' %}test string{% endcapture %}{{var}}", {})
   end
 
+  def test_capture_with_hyphen_in_variable_name
+    template_source = <<-END_TEMPLATE
+    {% capture this-thing %}Print this-thing{% endcapture %}
+    {{ this-thing }}
+    END_TEMPLATE
+    template = Template.parse(template_source)
+    rendered = template.render!
+    assert_equal "Print this-thing", rendered.strip
+  end
+
   def test_capture_to_variable_from_outer_scope_if_existing
     template_source = <<-END_TEMPLATE
     {% assign var = '' %}

test/integration/context_test.rb

@@ -23,12 +23,10 @@ class ContextTest < Minitest::Test
   end
 
   def test_has_key_will_not_add_an_error_for_missing_keys
-    Template.error_mode = :strict
-
-    context = Context.new
-
-    context.has_key?('unknown')
-
-    assert_empty context.errors
+    with_error_mode :strict do
+      context = Context.new
+      context.has_key?('unknown')
+      assert_empty context.errors
+    end
   end
 end

test/integration/document_test.rb

@@ -0,0 +1,19 @@
+require 'test_helper'
+
+class DocumentTest < Minitest::Test
+  include Liquid
+
+  def test_unexpected_outer_tag
+    exc = assert_raises(SyntaxError) do
+      Template.parse("{% else %}")
+    end
+    assert_equal exc.message, "Liquid syntax error: Unexpected outer 'else' tag"
+  end
+
+  def test_unknown_tag
+    exc = assert_raises(SyntaxError) do
+      Template.parse("{% foo %}")
+    end
+    assert_equal exc.message, "Liquid syntax error: Unknown tag 'foo'"
+  end
+end

test/integration/drop_test.rb

@@ -14,7 +14,7 @@ class ContextDrop < Liquid::Drop
   end
 
   def before_method(method)
-    return @context[method]
+    @context[method]
   end
 end
 
@@ -32,7 +32,7 @@ class ProductDrop < Liquid::Drop
 
   class CatchallDrop < Liquid::Drop
     def before_method(method)
-      return 'method: ' << method.to_s
+      'method: ' << method.to_s
     end
   end
 
@@ -48,10 +48,15 @@ class ProductDrop < Liquid::Drop
     ContextDrop.new
   end
 
+  def user_input
+    "foo".taint
+  end
+
   protected
-    def callmenot
-      "protected"
-    end
+
+  def callmenot
+    "protected"
+  end
 end
 
 class EnumerableDrop < Liquid::Drop
@@ -108,6 +113,30 @@ class DropsTest < Minitest::Test
     assert_equal '  ', tpl.render!('product' => ProductDrop.new)
   end
 
+  def test_rendering_raises_on_tainted_attr
+    with_taint_mode(:error) do
+      tpl = Liquid::Template.parse('{{ product.user_input }}')
+      assert_raises TaintedError do
+        tpl.render!('product' => ProductDrop.new)
+      end
+    end
+  end
+
+  def test_rendering_warns_on_tainted_attr
+    with_taint_mode(:warn) do
+      tpl = Liquid::Template.parse('{{ product.user_input }}')
+      tpl.render!('product' => ProductDrop.new)
+      assert_match /tainted/, tpl.warnings.first
+    end
+  end
+
+  def test_rendering_doesnt_raise_on_escaped_tainted_attr
+    with_taint_mode(:error) do
+      tpl = Liquid::Template.parse('{{ product.user_input | escape }}')
+      tpl.render!('product' => ProductDrop.new)
+    end
+  end
+
   def test_drop_does_only_respond_to_whitelisted_methods
     assert_equal "", Liquid::Template.parse("{{ product.inspect }}").render!('product' => ProductDrop.new)
     assert_equal "", Liquid::Template.parse("{{ product.pretty_inspect }}").render!('product' => ProductDrop.new)
@@ -123,37 +152,37 @@ class DropsTest < Minitest::Test
   end
 
   def test_text_drop
-    output = Liquid::Template.parse( ' {{ product.texts.text }} '  ).render!('product' => ProductDrop.new)
+    output = Liquid::Template.parse(' {{ product.texts.text }} ').render!('product' => ProductDrop.new)
     assert_equal ' text1 ', output
   end
 
   def test_unknown_method
-    output = Liquid::Template.parse( ' {{ product.catchall.unknown }} '  ).render!('product' => ProductDrop.new)
+    output = Liquid::Template.parse(' {{ product.catchall.unknown }} ').render!('product' => ProductDrop.new)
     assert_equal ' method: unknown ', output
   end
 
   def test_integer_argument_drop
-    output = Liquid::Template.parse( ' {{ product.catchall[8] }} '  ).render!('product' => ProductDrop.new)
+    output = Liquid::Template.parse(' {{ product.catchall[8] }} ').render!('product' => ProductDrop.new)
     assert_equal ' method: 8 ', output
   end
 
   def test_text_array_drop
-    output = Liquid::Template.parse( '{% for text in product.texts.array %} {{text}} {% endfor %}'  ).render!('product' => ProductDrop.new)
+    output = Liquid::Template.parse('{% for text in product.texts.array %} {{text}} {% endfor %}').render!('product' => ProductDrop.new)
     assert_equal ' text1  text2 ', output
   end
 
   def test_context_drop
-    output = Liquid::Template.parse( ' {{ context.bar }} '  ).render!('context' => ContextDrop.new, 'bar' => "carrot")
+    output = Liquid::Template.parse(' {{ context.bar }} ').render!('context' => ContextDrop.new, 'bar' => "carrot")
     assert_equal ' carrot ', output
   end
 
   def test_nested_context_drop
-    output = Liquid::Template.parse( ' {{ product.context.foo }} '  ).render!('product' => ProductDrop.new, 'foo' => "monkey")
+    output = Liquid::Template.parse(' {{ product.context.foo }} ').render!('product' => ProductDrop.new, 'foo' => "monkey")
     assert_equal ' monkey ', output
   end
 
   def test_protected
-    output = Liquid::Template.parse( ' {{ product.callmenot }} '  ).render!('product' => ProductDrop.new)
+    output = Liquid::Template.parse(' {{ product.callmenot }} ').render!('product' => ProductDrop.new)
     assert_equal '  ', output
   end
 
@@ -165,40 +194,40 @@ class DropsTest < Minitest::Test
   end
 
   def test_scope
-    assert_equal '1', Liquid::Template.parse( '{{ context.scopes }}'  ).render!('context' => ContextDrop.new)
-    assert_equal '2', Liquid::Template.parse( '{%for i in dummy%}{{ context.scopes }}{%endfor%}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
-    assert_equal '3', Liquid::Template.parse( '{%for i in dummy%}{%for i in dummy%}{{ context.scopes }}{%endfor%}{%endfor%}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
+    assert_equal '1', Liquid::Template.parse('{{ context.scopes }}').render!('context' => ContextDrop.new)
+    assert_equal '2', Liquid::Template.parse('{%for i in dummy%}{{ context.scopes }}{%endfor%}').render!('context' => ContextDrop.new, 'dummy' => [1])
+    assert_equal '3', Liquid::Template.parse('{%for i in dummy%}{%for i in dummy%}{{ context.scopes }}{%endfor%}{%endfor%}').render!('context' => ContextDrop.new, 'dummy' => [1])
   end
 
   def test_scope_though_proc
-    assert_equal '1', Liquid::Template.parse( '{{ s }}'  ).render!('context' => ContextDrop.new, 's' => Proc.new{|c| c['context.scopes'] })
-    assert_equal '2', Liquid::Template.parse( '{%for i in dummy%}{{ s }}{%endfor%}'  ).render!('context' => ContextDrop.new, 's' => Proc.new{|c| c['context.scopes'] }, 'dummy' => [1])
-    assert_equal '3', Liquid::Template.parse( '{%for i in dummy%}{%for i in dummy%}{{ s }}{%endfor%}{%endfor%}'  ).render!('context' => ContextDrop.new, 's' => Proc.new{|c| c['context.scopes'] }, 'dummy' => [1])
+    assert_equal '1', Liquid::Template.parse('{{ s }}').render!('context' => ContextDrop.new, 's' => proc{ |c| c['context.scopes'] })
+    assert_equal '2', Liquid::Template.parse('{%for i in dummy%}{{ s }}{%endfor%}').render!('context' => ContextDrop.new, 's' => proc{ |c| c['context.scopes'] }, 'dummy' => [1])
+    assert_equal '3', Liquid::Template.parse('{%for i in dummy%}{%for i in dummy%}{{ s }}{%endfor%}{%endfor%}').render!('context' => ContextDrop.new, 's' => proc{ |c| c['context.scopes'] }, 'dummy' => [1])
   end
 
   def test_scope_with_assigns
-    assert_equal 'variable', Liquid::Template.parse( '{% assign a = "variable"%}{{a}}'  ).render!('context' => ContextDrop.new)
-    assert_equal 'variable', Liquid::Template.parse( '{% assign a = "variable"%}{%for i in dummy%}{{a}}{%endfor%}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
-    assert_equal 'test', Liquid::Template.parse( '{% assign header_gif = "test"%}{{header_gif}}'  ).render!('context' => ContextDrop.new)
-    assert_equal 'test', Liquid::Template.parse( "{% assign header_gif = 'test'%}{{header_gif}}"  ).render!('context' => ContextDrop.new)
+    assert_equal 'variable', Liquid::Template.parse('{% assign a = "variable"%}{{a}}').render!('context' => ContextDrop.new)
+    assert_equal 'variable', Liquid::Template.parse('{% assign a = "variable"%}{%for i in dummy%}{{a}}{%endfor%}').render!('context' => ContextDrop.new, 'dummy' => [1])
+    assert_equal 'test', Liquid::Template.parse('{% assign header_gif = "test"%}{{header_gif}}').render!('context' => ContextDrop.new)
+    assert_equal 'test', Liquid::Template.parse("{% assign header_gif = 'test'%}{{header_gif}}").render!('context' => ContextDrop.new)
   end
 
   def test_scope_from_tags
-    assert_equal '1', Liquid::Template.parse( '{% for i in context.scopes_as_array %}{{i}}{% endfor %}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
-    assert_equal '12', Liquid::Template.parse( '{%for a in dummy%}{% for i in context.scopes_as_array %}{{i}}{% endfor %}{% endfor %}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
-    assert_equal '123', Liquid::Template.parse( '{%for a in dummy%}{%for a in dummy%}{% for i in context.scopes_as_array %}{{i}}{% endfor %}{% endfor %}{% endfor %}'  ).render!('context' => ContextDrop.new, 'dummy' => [1])
+    assert_equal '1', Liquid::Template.parse('{% for i in context.scopes_as_array %}{{i}}{% endfor %}').render!('context' => ContextDrop.new, 'dummy' => [1])
+    assert_equal '12', Liquid::Template.parse('{%for a in dummy%}{% for i in context.scopes_as_array %}{{i}}{% endfor %}{% endfor %}').render!('context' => ContextDrop.new, 'dummy' => [1])
+    assert_equal '123', Liquid::Template.parse('{%for a in dummy%}{%for a in dummy%}{% for i in context.scopes_as_array %}{{i}}{% endfor %}{% endfor %}{% endfor %}').render!('context' => ContextDrop.new, 'dummy' => [1])
   end
 
   def test_access_context_from_drop
-    assert_equal '123', Liquid::Template.parse( '{%for a in dummy%}{{ context.loop_pos }}{% endfor %}'  ).render!('context' => ContextDrop.new, 'dummy' => [1,2,3])
+    assert_equal '123', Liquid::Template.parse('{%for a in dummy%}{{ context.loop_pos }}{% endfor %}').render!('context' => ContextDrop.new, 'dummy' => [1, 2, 3])
   end
 
   def test_enumerable_drop
-    assert_equal '123', Liquid::Template.parse( '{% for c in collection %}{{c}}{% endfor %}').render!('collection' => EnumerableDrop.new)
+    assert_equal '123', Liquid::Template.parse('{% for c in collection %}{{c}}{% endfor %}').render!('collection' => EnumerableDrop.new)
   end
 
   def test_enumerable_drop_size
-    assert_equal '3', Liquid::Template.parse( '{{collection.size}}').render!('collection' => EnumerableDrop.new)
+    assert_equal '3', Liquid::Template.parse('{{collection.size}}').render!('collection' => EnumerableDrop.new)
   end
 
   def test_enumerable_drop_will_invoke_before_method_for_clashing_method_names

test/integration/error_handling_test.rb

@@ -1,24 +1,5 @@
 require 'test_helper'
 
-class ErrorDrop < Liquid::Drop
-  def standard_error
-    raise Liquid::StandardError, 'standard error'
-  end
-
-  def argument_error
-    raise Liquid::ArgumentError, 'argument error'
-  end
-
-  def syntax_error
-    raise Liquid::SyntaxError, 'syntax error'
-  end
-
-  def exception
-    raise Exception, 'exception'
-  end
-
-end
-
 class ErrorHandlingTest < Minitest::Test
   include Liquid
 
@@ -56,7 +37,7 @@ class ErrorHandlingTest < Minitest::Test
   end
 
   def test_standard_error
-    template = Liquid::Template.parse( ' {{ errors.standard_error }} '  )
+    template = Liquid::Template.parse(' {{ errors.standard_error }} ')
     assert_equal ' Liquid error: standard error ', template.render('errors' => ErrorDrop.new)
 
     assert_equal 1, template.errors.size
@@ -64,7 +45,7 @@ class ErrorHandlingTest < Minitest::Test
   end
 
   def test_syntax
-    template = Liquid::Template.parse( ' {{ errors.syntax_error }} '  )
+    template = Liquid::Template.parse(' {{ errors.syntax_error }} ')
     assert_equal ' Liquid syntax error: syntax error ', template.render('errors' => ErrorDrop.new)
 
     assert_equal 1, template.errors.size
@@ -72,7 +53,7 @@ class ErrorHandlingTest < Minitest::Test
   end
 
   def test_argument
-    template = Liquid::Template.parse( ' {{ errors.argument_error }} '  )
+    template = Liquid::Template.parse(' {{ errors.argument_error }} ')
     assert_equal ' Liquid error: argument error ', template.render('errors' => ErrorDrop.new)
 
     assert_equal 1, template.errors.size
@@ -100,6 +81,73 @@ class ErrorHandlingTest < Minitest::Test
     assert_equal Liquid::ArgumentError, template.errors.first.class
   end
 
+  def test_with_line_numbers_adds_numbers_to_parser_errors
+    err = assert_raises(SyntaxError) do
+      template = Liquid::Template.parse(%q(
+          foobar
+
+          {% "cat" | foobar %}
+
+          bla
+                ),
+        :line_numbers => true
+                                       )
+    end
+
+    assert_match /Liquid syntax error \(line 4\)/, err.message
+  end
+
+  def test_parsing_warn_with_line_numbers_adds_numbers_to_lexer_errors
+    template = Liquid::Template.parse('
+        foobar
+
+        {% if 1 =! 2 %}ok{% endif %}
+
+        bla
+            ',
+      :error_mode => :warn,
+      :line_numbers => true
+                                     )
+
+    assert_equal ['Liquid syntax error (line 4): Unexpected character = in "1 =! 2"'],
+      template.warnings.map(&:message)
+  end
+
+  def test_parsing_strict_with_line_numbers_adds_numbers_to_lexer_errors
+    err = assert_raises(SyntaxError) do
+      Liquid::Template.parse('
+          foobar
+
+          {% if 1 =! 2 %}ok{% endif %}
+
+          bla
+                ',
+        :error_mode => :strict,
+        :line_numbers => true
+                            )
+    end
+
+    assert_equal 'Liquid syntax error (line 4): Unexpected character = in "1 =! 2"', err.message
+  end
+
+  def test_syntax_errors_in_nested_blocks_have_correct_line_number
+    err = assert_raises(SyntaxError) do
+      Liquid::Template.parse('
+          foobar
+
+          {% if 1 != 2 %}
+            {% foo %}
+          {% endif %}
+
+          bla
+                ',
+        :line_numbers => true
+                            )
+    end
+
+    assert_equal "Liquid syntax error (line 5): Unknown tag 'foo'", err.message
+  end
+
   def test_strict_error_messages
     err = assert_raises(SyntaxError) do
       Liquid::Template.parse(' {% if 1 =! 2 %}ok{% endif %} ', :error_mode => :strict)
@@ -127,7 +175,7 @@ class ErrorHandlingTest < Minitest::Test
     assert_equal 'Liquid syntax error (line 2): Unexpected character % in "{{%%%}}"', template.warnings[1].message
     assert_equal 'Liquid syntax error (line 3): Expected id but found end_of_string in "{{ hello. }}"', template.warnings[2].message
     assert_equal 3, template.warnings.size
-    assert_equal [1,2,3], template.warnings.map(&:line_number)
+    assert_equal [1, 2, 3], template.warnings.map(&:line_number)
   end
 
   # Liquid should not catch Exceptions that are not subclasses of StandardError, like Interrupt and NoMemoryError
@@ -137,4 +185,11 @@ class ErrorHandlingTest < Minitest::Test
       template.render('errors' => ErrorDrop.new)
     end
   end
+
+  def test_disabling_error_rendering
+    template = Liquid::Template.parse('This is an argument error: {{ errors.argument_error }}')
+    template.render_errors = false
+    assert_equal 'This is an argument error: ', template.render('errors' => ErrorDrop.new)
+    assert_equal [ArgumentError], template.errors.map(&:class)
+  end
 end

test/integration/filter_test.rb

@@ -17,14 +17,26 @@ module CanadianMoneyFilter
 end
 
 module SubstituteFilter
-  def substitute(input, params={})
+  def substitute(input, params = {})
     input.gsub(/%\{(\w+)\}/) { |match| params[$1] }
   end
 end
 
+module ErrorFilter
+  def standard_error(input)
+    raise ::StandardError, 'standard error'
+  end
+end
+
 class FiltersTest < Minitest::Test
   include Liquid
 
+  module OverrideObjectMethodFilter
+    def tap(input)
+      "tap overridden"
+    end
+  end
+
   def setup
     @context = Context.new
   end
@@ -58,21 +70,44 @@ class FiltersTest < Minitest::Test
   end
 
   def test_join
-    @context['var'] = [1,2,3,4]
+    @context['var'] = [1, 2, 3, 4]
 
     assert_equal "1 2 3 4", Variable.new("var | join").render(@context)
   end
 
   def test_sort
     @context['value'] = 3
-    @context['numbers'] = [2,1,4,3]
+    @context['numbers'] = [2, 1, 4, 3]
     @context['words'] = ['expected', 'as', 'alphabetic']
     @context['arrays'] = ['flower', 'are']
+    @context['case_sensitive'] = ['sensitive', 'Expected', 'case']
 
-    assert_equal [1,2,3,4], Variable.new("numbers | sort").render(@context)
+    assert_equal [1, 2, 3, 4], Variable.new("numbers | sort").render(@context)
     assert_equal ['alphabetic', 'as', 'expected'], Variable.new("words | sort").render(@context)
     assert_equal [3], Variable.new("value | sort").render(@context)
     assert_equal ['are', 'flower'], Variable.new("arrays | sort").render(@context)
+    assert_equal ['Expected', 'case', 'sensitive'], Variable.new("case_sensitive | sort").render(@context)
+  end
+
+  def test_sort_natural
+    @context['words'] = ['case', 'Assert', 'Insensitive']
+    @context['hashes'] = [{ 'a' => 'A' }, { 'a' => 'b' }, { 'a' => 'C' }]
+    @context['objects'] = [TestObject.new('A'), TestObject.new('b'), TestObject.new('C')]
+
+    # Test strings
+    assert_equal ['Assert', 'case', 'Insensitive'], Variable.new("words | sort_natural").render(@context)
+
+    # Test hashes
+    sorted = Variable.new("hashes | sort_natural: 'a'").render(@context)
+    assert_equal sorted[0]['a'], 'A'
+    assert_equal sorted[1]['a'], 'b'
+    assert_equal sorted[2]['a'], 'C'
+
+    # Test objects
+    sorted = Variable.new("objects | sort_natural: 'a'").render(@context)
+    assert_equal sorted[0].a, 'A'
+    assert_equal sorted[1].a, 'b'
+    assert_equal sorted[2].a, 'C'
   end
 
   def test_strip_html
@@ -102,9 +137,16 @@ class FiltersTest < Minitest::Test
   def test_filter_with_keyword_arguments
     @context['surname'] = 'john'
     @context.add_filters(SubstituteFilter)
-    output = Variable.new(%! 'hello %{first_name}, %{last_name}' | substitute: first_name: surname, last_name: 'doe' !).render(@context)
+    output = Variable.new(%( 'hello %{first_name}, %{last_name}' | substitute: first_name: surname, last_name: 'doe' )).render(@context)
     assert_equal 'hello john, doe', output
   end
+
+  def test_override_object_method_in_filter
+    assert_equal "tap overridden", Template.parse("{{var | tap}}").render!({ 'var' => 1000 }, :filters => [OverrideObjectMethodFilter])
+
+    # tap still treated as a non-existent filter
+    assert_equal "1000", Template.parse("{{var | tap}}").render!({ 'var' => 1000 })
+  end
 end
 
 class FiltersInTemplate < Minitest::Test
@@ -122,4 +164,18 @@ class FiltersInTemplate < Minitest::Test
     assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, CanadianMoneyFilter)
     assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, [CanadianMoneyFilter])
   end
-end # FiltersTest
+
+  def test_filter_error
+    context = Context.new
+    context.add_filters(ErrorFilter)
+    assert_equal "Liquid error: standard error", Template.parse("{{'var' | standard_error}}").render(context)
+    assert_equal [Liquid::FilterError], context.errors.map(&:class)
+  end
+end
+
+class TestObject
+  attr_accessor :a
+  def initialize(a)
+    @a = a
+  end
+end

test/integration/output_test.rb

@@ -14,7 +14,7 @@ module FunnyFilter
   end
 
   def add_tag(input, tag = "p", id = "foo")
-    %|<#{tag} id="#{id}">#{input}</#{tag}>|
+    %(<#{tag} id="#{id}">#{input}</#{tag}>)
   end
 
   def paragraph(input)
@@ -22,9 +22,8 @@ module FunnyFilter
   end
 
   def link_to(name, url)
-    %|<a href="#{url}">#{name}</a>|
+    %(<a href="#{url}">#{name}</a>)
   end
-
 end
 
 class OutputTest < Minitest::Test
@@ -33,34 +32,34 @@ class OutputTest < Minitest::Test
   def setup
     @assigns = {
       'best_cars' => 'bmw',
-      'car' => {'bmw' => 'good', 'gm' => 'bad'}
-      }
+      'car' => { 'bmw' => 'good', 'gm' => 'bad' }
+    }
   end
 
   def test_variable
-    text = %| {{best_cars}} |
+    text = %( {{best_cars}} )
 
-    expected = %| bmw |
+    expected = %( bmw )
     assert_equal expected, Template.parse(text).render!(@assigns)
   end
 
   def test_variable_traversing
-    text = %| {{car.bmw}} {{car.gm}} {{car.bmw}} |
+    text = %( {{car.bmw}} {{car.gm}} {{car.bmw}} )
 
-    expected = %| good bad good |
+    expected = %( good bad good )
     assert_equal expected, Template.parse(text).render!(@assigns)
   end
 
   def test_variable_piping
     text = %( {{ car.gm | make_funny }} )
-    expected = %| LOL |
+    expected = %( LOL )
 
     assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
   end
 
   def test_variable_piping_with_input
     text = %( {{ car.gm | cite_funny }} )
-    expected = %| LOL: bad |
+    expected = %( LOL: bad )
 
     assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
   end
@@ -73,7 +72,7 @@ class OutputTest < Minitest::Test
   end
 
   def test_variable_piping_with_no_args
-    text = %! {{ car.gm | add_smiley }} !
+    text = %( {{ car.gm | add_smiley }} )
     expected = %| bad :-) |
 
     assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
@@ -87,29 +86,29 @@ class OutputTest < Minitest::Test
   end
 
   def test_variable_piping_with_multiple_args
-    text = %! {{ car.gm | add_tag : 'span', 'bar'}} !
-    expected = %| <span id="bar">bad</span> |
+    text = %( {{ car.gm | add_tag : 'span', 'bar'}} )
+    expected = %( <span id="bar">bad</span> )
 
     assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
   end
 
   def test_variable_piping_with_variable_args
-    text = %! {{ car.gm | add_tag : 'span', car.bmw}} !
-    expected = %| <span id="good">bad</span> |
+    text = %( {{ car.gm | add_tag : 'span', car.bmw}} )
+    expected = %( <span id="good">bad</span> )
 
     assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
   end
 
   def test_multiple_pipings
     text = %( {{ best_cars | cite_funny | paragraph }} )
-    expected = %| <p>LOL: bmw</p> |
+    expected = %( <p>LOL: bmw</p> )
 
     assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
   end
 
   def test_link_to
     text = %( {{ 'Typo' | link_to: 'http://typo.leetsoft.com' }} )
-    expected = %| <a href="http://typo.leetsoft.com">Typo</a> |
+    expected = %( <a href="http://typo.leetsoft.com">Typo</a> )
 
     assert_equal expected, Template.parse(text).render!(@assigns, :filters => [FunnyFilter])
   end

test/integration/parsing_quirks_test.rb

@@ -28,11 +28,14 @@ class ParsingQuirksTest < Minitest::Test
 
   def test_error_on_empty_filter
     assert Template.parse("{{test}}")
-    assert Template.parse("{{|test}}")
+
+    with_error_mode(:lax) do
+      assert Template.parse("{{|test}}")
+    end
+
     with_error_mode(:strict) do
-      assert_raises(SyntaxError) do
-        Template.parse("{{test |a|b|}}")
-      end
+      assert_raises(SyntaxError) { Template.parse("{{|test}}") }
+      assert_raises(SyntaxError) { Template.parse("{{test |a|b|}}") }
     end
   end
 
@@ -66,18 +69,18 @@ class ParsingQuirksTest < Minitest::Test
 
   def test_meaningless_parens_lax
     with_error_mode(:lax) do
-      assigns = {'b' => 'bar', 'c' => 'baz'}
+      assigns = { 'b' => 'bar', 'c' => 'baz' }
       markup = "a == 'foo' or (b == 'bar' and c == 'baz') or false"
-      assert_template_result(' YES ',"{% if #{markup} %} YES {% endif %}", assigns)
+      assert_template_result(' YES ', "{% if #{markup} %} YES {% endif %}", assigns)
     end
   end
 
   def test_unexpected_characters_silently_eat_logic_lax
     with_error_mode(:lax) do
       markup = "true && false"
-      assert_template_result(' YES ',"{% if #{markup} %} YES {% endif %}")
+      assert_template_result(' YES ', "{% if #{markup} %} YES {% endif %}")
       markup = "false || true"
-      assert_template_result('',"{% if #{markup} %} YES {% endif %}")
+      assert_template_result('', "{% if #{markup} %} YES {% endif %}")
     end
   end
 
@@ -89,7 +92,7 @@ class ParsingQuirksTest < Minitest::Test
 
   def test_unanchored_filter_arguments
     with_error_mode(:lax) do
-      assert_template_result('hi',"{{ 'hi there' | split$$$:' ' | first }}")
+      assert_template_result('hi', "{{ 'hi there' | split$$$:' ' | first }}")
 
       assert_template_result('x', "{{ 'X' | downcase) }}")
 
@@ -100,4 +103,17 @@ class ParsingQuirksTest < Minitest::Test
     end
   end
 
+  def test_invalid_variables_work
+    with_error_mode(:lax) do
+      assert_template_result('bar', "{% assign 123foo = 'bar' %}{{ 123foo }}")
+      assert_template_result('123', "{% assign 123 = 'bar' %}{{ 123 }}")
+    end
+  end
+
+  def test_extra_dots_in_ranges
+    with_error_mode(:lax) do
+      assert_template_result('12345', "{% for i in (1...5) %}{{ i }}{% endfor %}")
+    end
+  end
+
 end # ParsingQuirksTest

test/integration/render_profiling_test.rb

@@ -4,7 +4,7 @@ class RenderProfilingTest < Minitest::Test
   include Liquid
 
   class ProfilingFileSystem
-    def read_template_file(template_path, context)
+    def read_template_file(template_path)
       "Rendering template {% assign template_name = '#{template_path}'%}\n{{ template_name }}"
     end
   end
@@ -72,7 +72,7 @@ class RenderProfilingTest < Minitest::Test
     t = Template.parse("{% include 'a_template' %}", :profile => true)
     t.render!
 
-    assert t.profiler.total_render_time > 0, "Total render time was not calculated"
+    assert t.profiler.total_render_time >= 0, "Total render time was not calculated"
   end
 
   def test_profiling_uses_include_to_mark_children
@@ -89,7 +89,7 @@ class RenderProfilingTest < Minitest::Test
 
     include_node = t.profiler[1]
     include_node.children.each do |child|
-      assert_equal "'a_template'", child.partial
+      assert_equal "a_template", child.partial
     end
   end
 
@@ -99,12 +99,12 @@ class RenderProfilingTest < Minitest::Test
 
     a_template = t.profiler[1]
     a_template.children.each do |child|
-      assert_equal "'a_template'", child.partial
+      assert_equal "a_template", child.partial
     end
 
     b_template = t.profiler[2]
     b_template.children.each do |child|
-      assert_equal "'b_template'", child.partial
+      assert_equal "b_template", child.partial
     end
   end
 
@@ -114,12 +114,12 @@ class RenderProfilingTest < Minitest::Test
 
     a_template1 = t.profiler[1]
     a_template1.children.each do |child|
-      assert_equal "'a_template'", child.partial
+      assert_equal "a_template", child.partial
     end
 
     a_template2 = t.profiler[2]
     a_template2.children.each do |child|
-      assert_equal "'a_template'", child.partial
+      assert_equal "a_template", child.partial
     end
   end
 
@@ -145,7 +145,7 @@ class RenderProfilingTest < Minitest::Test
 
   def test_profiling_marks_children_of_for_blocks
     t = Template.parse("{% for item in collection %} {{ item }} {% endfor %}", :profile => true)
-    t.render!({"collection" => ["one", "two"]})
+    t.render!({ "collection" => ["one", "two"] })
 
     assert_equal 1, t.profiler.length
     # Will profile each invocation of the for block

test/integration/security_test.rb

@@ -11,30 +11,28 @@ class SecurityTest < Minitest::Test
 
   def test_no_instance_eval
     text = %( {{ '1+1' | instance_eval }} )
-    expected = %| 1+1 |
+    expected = %( 1+1 )
 
     assert_equal expected, Template.parse(text).render!(@assigns)
   end
 
   def test_no_existing_instance_eval
     text = %( {{ '1+1' | __instance_eval__ }} )
-    expected = %| 1+1 |
+    expected = %( 1+1 )
 
     assert_equal expected, Template.parse(text).render!(@assigns)
   end
 
-
   def test_no_instance_eval_after_mixing_in_new_filter
     text = %( {{ '1+1' | instance_eval }} )
-    expected = %| 1+1 |
+    expected = %( 1+1 )
 
     assert_equal expected, Template.parse(text).render!(@assigns)
   end
 
-
   def test_no_instance_eval_later_in_chain
     text = %( {{ '1+1' | add_one | instance_eval }} )
-    expected = %| 1+1 + 1 |
+    expected = %( 1+1 + 1 )
 
     assert_equal expected, Template.parse(text).render!(@assigns, :filters => SecurityFilter)
   end

test/integration/standard_filter_test.rb

@@ -49,7 +49,7 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_size
-    assert_equal 3, @filters.size([1,2,3])
+    assert_equal 3, @filters.size([1, 2, 3])
     assert_equal 0, @filters.size([])
     assert_equal 0, @filters.size(nil)
   end
@@ -80,16 +80,16 @@ class StandardFiltersTest < Minitest::Test
 
   def test_slice_on_arrays
     input = 'foobar'.split(//)
-    assert_equal %w{o o b}, @filters.slice(input, 1, 3)
-    assert_equal %w{o o b a r}, @filters.slice(input, 1, 1000)
-    assert_equal %w{}, @filters.slice(input, 1, 0)
-    assert_equal %w{o}, @filters.slice(input, 1, 1)
-    assert_equal %w{b a r}, @filters.slice(input, 3, 3)
-    assert_equal %w{a r}, @filters.slice(input, -2, 2)
-    assert_equal %w{a r}, @filters.slice(input, -2, 1000)
-    assert_equal %w{r}, @filters.slice(input, -1)
-    assert_equal %w{}, @filters.slice(input, 100, 10)
-    assert_equal %w{}, @filters.slice(input, -100, 10)
+    assert_equal %w(o o b), @filters.slice(input, 1, 3)
+    assert_equal %w(o o b a r), @filters.slice(input, 1, 1000)
+    assert_equal %w(), @filters.slice(input, 1, 0)
+    assert_equal %w(o), @filters.slice(input, 1, 1)
+    assert_equal %w(b a r), @filters.slice(input, 3, 3)
+    assert_equal %w(a r), @filters.slice(input, -2, 2)
+    assert_equal %w(a r), @filters.slice(input, -2, 1000)
+    assert_equal %w(r), @filters.slice(input, -1)
+    assert_equal %w(), @filters.slice(input, 100, 10)
+    assert_equal %w(), @filters.slice(input, -100, 10)
   end
 
   def test_truncate
@@ -101,11 +101,11 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_split
-    assert_equal ['12','34'], @filters.split('12~34', '~')
-    assert_equal ['A? ',' ,Z'], @filters.split('A? ~ ~ ~ ,Z', '~ ~ ~')
+    assert_equal ['12', '34'], @filters.split('12~34', '~')
+    assert_equal ['A? ', ' ,Z'], @filters.split('A? ~ ~ ~ ,Z', '~ ~ ~')
     assert_equal ['A?Z'], @filters.split('A?Z', '~')
     # Regexp works although Liquid does not support.
-    assert_equal ['A','Z'], @filters.split('AxZ', /x/)
+    assert_equal ['A', 'Z'], @filters.split('AxZ', /x/)
     assert_equal [], @filters.split(nil, ' ')
   end
 
@@ -142,45 +142,45 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_join
-    assert_equal '1 2 3 4', @filters.join([1,2,3,4])
-    assert_equal '1 - 2 - 3 - 4', @filters.join([1,2,3,4], ' - ')
+    assert_equal '1 2 3 4', @filters.join([1, 2, 3, 4])
+    assert_equal '1 - 2 - 3 - 4', @filters.join([1, 2, 3, 4], ' - ')
   end
 
   def test_sort
-    assert_equal [1,2,3,4], @filters.sort([4,3,2,1])
-    assert_equal [{"a" => 1}, {"a" => 2}, {"a" => 3}, {"a" => 4}], @filters.sort([{"a" => 4}, {"a" => 3}, {"a" => 1}, {"a" => 2}], "a")
+    assert_equal [1, 2, 3, 4], @filters.sort([4, 3, 2, 1])
+    assert_equal [{ "a" => 1 }, { "a" => 2 }, { "a" => 3 }, { "a" => 4 }], @filters.sort([{ "a" => 4 }, { "a" => 3 }, { "a" => 1 }, { "a" => 2 }], "a")
   end
 
   def test_legacy_sort_hash
-    assert_equal [{a:1, b:2}], @filters.sort({a:1, b:2})
+    assert_equal [{ a: 1, b: 2 }], @filters.sort({ a: 1, b: 2 })
   end
 
   def test_numerical_vs_lexicographical_sort
     assert_equal [2, 10], @filters.sort([10, 2])
-    assert_equal [{"a" => 2}, {"a" => 10}], @filters.sort([{"a" => 10}, {"a" => 2}], "a")
+    assert_equal [{ "a" => 2 }, { "a" => 10 }], @filters.sort([{ "a" => 10 }, { "a" => 2 }], "a")
     assert_equal ["10", "2"], @filters.sort(["10", "2"])
-    assert_equal [{"a" => "10"}, {"a" => "2"}], @filters.sort([{"a" => "10"}, {"a" => "2"}], "a")
+    assert_equal [{ "a" => "10" }, { "a" => "2" }], @filters.sort([{ "a" => "10" }, { "a" => "2" }], "a")
   end
 
   def test_uniq
-    assert_equal [1,3,2,4], @filters.uniq([1,1,3,2,3,1,4,3,2,1])
-    assert_equal [{"a" => 1}, {"a" => 3}, {"a" => 2}], @filters.uniq([{"a" => 1}, {"a" => 3}, {"a" => 1}, {"a" => 2}], "a")
+    assert_equal [1, 3, 2, 4], @filters.uniq([1, 1, 3, 2, 3, 1, 4, 3, 2, 1])
+    assert_equal [{ "a" => 1 }, { "a" => 3 }, { "a" => 2 }], @filters.uniq([{ "a" => 1 }, { "a" => 3 }, { "a" => 1 }, { "a" => 2 }], "a")
     testdrop = TestDrop.new
     assert_equal [testdrop], @filters.uniq([testdrop, TestDrop.new], 'test')
   end
 
   def test_reverse
-    assert_equal [4,3,2,1], @filters.reverse([1,2,3,4])
+    assert_equal [4, 3, 2, 1], @filters.reverse([1, 2, 3, 4])
   end
 
   def test_legacy_reverse_hash
-    assert_equal [{a:1, b:2}], @filters.reverse(a:1, b:2)
+    assert_equal [{ a: 1, b: 2 }], @filters.reverse(a: 1, b: 2)
   end
 
   def test_map
-    assert_equal [1,2,3,4], @filters.map([{"a" => 1}, {"a" => 2}, {"a" => 3}, {"a" => 4}], 'a')
+    assert_equal [1, 2, 3, 4], @filters.map([{ "a" => 1 }, { "a" => 2 }, { "a" => 3 }, { "a" => 4 }], 'a')
     assert_template_result 'abc', "{{ ary | map:'foo' | map:'bar' }}",
-      'ary' => [{'foo' => {'bar' => 'a'}}, {'foo' => {'bar' => 'b'}}, {'foo' => {'bar' => 'c'}}]
+      'ary' => [{ 'foo' => { 'bar' => 'a' } }, { 'foo' => { 'bar' => 'b' } }, { 'foo' => { 'bar' => 'c' } }]
   end
 
   def test_map_doesnt_call_arbitrary_stuff
@@ -212,7 +212,7 @@ class StandardFiltersTest < Minitest::Test
 
   def test_map_over_proc
     drop = TestDrop.new
-    p = Proc.new{ drop }
+    p = proc{ drop }
     templ = '{{ procs | map: "test" }}'
     assert_template_result "testfoo", templ, "procs" => [p]
   end
@@ -249,16 +249,19 @@ class StandardFiltersTest < Minitest::Test
     assert_equal "07/16/2004", @filters.date("Fri Jul 16 01:00:00 2004", "%m/%d/%Y")
     assert_equal "#{Date.today.year}", @filters.date('now', '%Y')
     assert_equal "#{Date.today.year}", @filters.date('today', '%Y')
+    assert_equal "#{Date.today.year}", @filters.date('Today', '%Y')
 
     assert_equal nil, @filters.date(nil, "%B")
 
+    assert_equal '', @filters.date('', "%B")
+
     assert_equal "07/05/2006", @filters.date(1152098955, "%m/%d/%Y")
     assert_equal "07/05/2006", @filters.date("1152098955", "%m/%d/%Y")
   end
 
   def test_first_last
-    assert_equal 1, @filters.first([1,2,3])
-    assert_equal 3, @filters.last([1,2,3])
+    assert_equal 1, @filters.first([1, 2, 3])
+    assert_equal 3, @filters.last([1, 2, 3])
     assert_equal nil, @filters.first([])
     assert_equal nil, @filters.last([])
   end
@@ -353,15 +356,26 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_append
-    assigns = {'a' => 'bc', 'b' => 'd' }
-    assert_template_result('bcd',"{{ a | append: 'd'}}",assigns)
-    assert_template_result('bcd',"{{ a | append: b}}",assigns)
+    assigns = { 'a' => 'bc', 'b' => 'd' }
+    assert_template_result('bcd', "{{ a | append: 'd'}}", assigns)
+    assert_template_result('bcd', "{{ a | append: b}}", assigns)
+  end
+
+  def test_concat
+    assert_equal [1, 2, 3, 4], @filters.concat([1, 2], [3, 4])
+    assert_equal [1, 2, 'a'],  @filters.concat([1, 2], ['a'])
+    assert_equal [1, 2, 10],   @filters.concat([1, 2], [10])
+
+    assert_raises(TypeError) do
+      # no implicit conversion of Fixnum into Array
+      @filters.concat([1, 2], 10)
+    end
   end
 
   def test_prepend
-    assigns = {'a' => 'bc', 'b' => 'a' }
-    assert_template_result('abc',"{{ a | prepend: 'a'}}",assigns)
-    assert_template_result('abc',"{{ a | prepend: b}}",assigns)
+    assigns = { 'a' => 'bc', 'b' => 'a' }
+    assert_template_result('abc', "{{ a | prepend: 'a'}}", assigns)
+    assert_template_result('abc', "{{ a | prepend: b}}", assigns)
   end
 
   def test_default
@@ -374,6 +388,6 @@ class StandardFiltersTest < Minitest::Test
   end
 
   def test_cannot_access_private_methods
-    assert_template_result('a',"{{ 'a' | to_number }}")
+    assert_template_result('a', "{{ 'a' | to_number }}")
   end
 end # StandardFiltersTest

test/integration/tags/break_tag_test.rb

@@ -6,7 +6,7 @@ class BreakTagTest < Minitest::Test
   # tests that no weird errors are raised if break is called outside of a
   # block
   def test_break_with_no_block
-    assigns = {'i' => 1}
+    assigns = { 'i' => 1 }
     markup = '{% break %}'
     expected = ''
 

test/integration/tags/for_tag_test.rb

@@ -10,10 +10,10 @@ class ForTagTest < Minitest::Test
   include Liquid
 
   def test_for
-    assert_template_result(' yo  yo  yo  yo ','{%for item in array%} yo {%endfor%}','array' => [1,2,3,4])
-    assert_template_result('yoyo','{%for item in array%}yo{%endfor%}','array' => [1,2])
-    assert_template_result(' yo ','{%for item in array%} yo {%endfor%}','array' => [1])
-    assert_template_result('','{%for item in array%}{%endfor%}','array' => [1,2])
+    assert_template_result(' yo  yo  yo  yo ', '{%for item in array%} yo {%endfor%}', 'array' => [1, 2, 3, 4])
+    assert_template_result('yoyo', '{%for item in array%}yo{%endfor%}', 'array' => [1, 2])
+    assert_template_result(' yo ', '{%for item in array%} yo {%endfor%}', 'array' => [1])
+    assert_template_result('', '{%for item in array%}{%endfor%}', 'array' => [1, 2])
     expected = <<HERE
 
   yo
@@ -28,46 +28,46 @@ HERE
   yo
 {%endfor%}
 HERE
-    assert_template_result(expected,template,'array' => [1,2,3])
+    assert_template_result(expected, template, 'array' => [1, 2, 3])
   end
 
   def test_for_reversed
-    assigns = {'array' => [ 1, 2, 3] }
-    assert_template_result('321','{%for item in array reversed %}{{item}}{%endfor%}',assigns)
+    assigns = { 'array' => [ 1, 2, 3] }
+    assert_template_result('321', '{%for item in array reversed %}{{item}}{%endfor%}', assigns)
   end
 
   def test_for_with_range
-    assert_template_result(' 1  2  3 ','{%for item in (1..3) %} {{item}} {%endfor%}')
+    assert_template_result(' 1  2  3 ', '{%for item in (1..3) %} {{item}} {%endfor%}')
   end
 
   def test_for_with_variable_range
-    assert_template_result(' 1  2  3 ','{%for item in (1..foobar) %} {{item}} {%endfor%}', "foobar" => 3)
+    assert_template_result(' 1  2  3 ', '{%for item in (1..foobar) %} {{item}} {%endfor%}', "foobar" => 3)
   end
 
   def test_for_with_hash_value_range
     foobar = { "value" => 3 }
-    assert_template_result(' 1  2  3 ','{%for item in (1..foobar.value) %} {{item}} {%endfor%}', "foobar" => foobar)
+    assert_template_result(' 1  2  3 ', '{%for item in (1..foobar.value) %} {{item}} {%endfor%}', "foobar" => foobar)
   end
 
   def test_for_with_drop_value_range
     foobar = ThingWithValue.new
-    assert_template_result(' 1  2  3 ','{%for item in (1..foobar.value) %} {{item}} {%endfor%}', "foobar" => foobar)
+    assert_template_result(' 1  2  3 ', '{%for item in (1..foobar.value) %} {{item}} {%endfor%}', "foobar" => foobar)
   end
 
   def test_for_with_variable
-    assert_template_result(' 1  2  3 ','{%for item in array%} {{item}} {%endfor%}','array' => [1,2,3])
-    assert_template_result('123','{%for item in array%}{{item}}{%endfor%}','array' => [1,2,3])
-    assert_template_result('123','{% for item in array %}{{item}}{% endfor %}','array' => [1,2,3])
-    assert_template_result('abcd','{%for item in array%}{{item}}{%endfor%}','array' => ['a','b','c','d'])
-    assert_template_result('a b c','{%for item in array%}{{item}}{%endfor%}','array' => ['a',' ','b',' ','c'])
-    assert_template_result('abc','{%for item in array%}{{item}}{%endfor%}','array' => ['a','','b','','c'])
+    assert_template_result(' 1  2  3 ', '{%for item in array%} {{item}} {%endfor%}', 'array' => [1, 2, 3])
+    assert_template_result('123', '{%for item in array%}{{item}}{%endfor%}', 'array' => [1, 2, 3])
+    assert_template_result('123', '{% for item in array %}{{item}}{% endfor %}', 'array' => [1, 2, 3])
+    assert_template_result('abcd', '{%for item in array%}{{item}}{%endfor%}', 'array' => ['a', 'b', 'c', 'd'])
+    assert_template_result('a b c', '{%for item in array%}{{item}}{%endfor%}', 'array' => ['a', ' ', 'b', ' ', 'c'])
+    assert_template_result('abc', '{%for item in array%}{{item}}{%endfor%}', 'array' => ['a', '', 'b', '', 'c'])
   end
 
   def test_for_helpers
-    assigns = {'array' => [1,2,3] }
+    assigns = { 'array' => [1, 2, 3] }
     assert_template_result(' 1/3  2/3  3/3 ',
-                           '{%for item in array%} {{forloop.index}}/{{forloop.length}} {%endfor%}',
-                           assigns)
+      '{%for item in array%} {{forloop.index}}/{{forloop.length}} {%endfor%}',
+      assigns)
     assert_template_result(' 1  2  3 ', '{%for item in array%} {{forloop.index}} {%endfor%}', assigns)
     assert_template_result(' 0  1  2 ', '{%for item in array%} {{forloop.index0}} {%endfor%}', assigns)
     assert_template_result(' 2  1  0 ', '{%for item in array%} {{forloop.rindex0}} {%endfor%}', assigns)
@@ -77,20 +77,20 @@ HERE
   end
 
   def test_for_and_if
-    assigns = {'array' => [1,2,3] }
+    assigns = { 'array' => [1, 2, 3] }
     assert_template_result('+--',
-                           '{%for item in array%}{% if forloop.first %}+{% else %}-{% endif %}{%endfor%}',
-                           assigns)
+      '{%for item in array%}{% if forloop.first %}+{% else %}-{% endif %}{%endfor%}',
+      assigns)
   end
 
   def test_for_else
-    assert_template_result('+++', '{%for item in array%}+{%else%}-{%endfor%}', 'array'=>[1,2,3])
-    assert_template_result('-',   '{%for item in array%}+{%else%}-{%endfor%}', 'array'=>[])
-    assert_template_result('-',   '{%for item in array%}+{%else%}-{%endfor%}', 'array'=>nil)
+    assert_template_result('+++', '{%for item in array%}+{%else%}-{%endfor%}', 'array' => [1, 2, 3])
+    assert_template_result('-',   '{%for item in array%}+{%else%}-{%endfor%}', 'array' => [])
+    assert_template_result('-',   '{%for item in array%}+{%else%}-{%endfor%}', 'array' => nil)
   end
 
   def test_limiting
-    assigns = {'array' => [1,2,3,4,5,6,7,8,9,0]}
+    assigns = { 'array' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] }
     assert_template_result('12', '{%for i in array limit:2 %}{{ i }}{%endfor%}', assigns)
     assert_template_result('1234', '{%for i in array limit:4 %}{{ i }}{%endfor%}', assigns)
     assert_template_result('3456', '{%for i in array limit:4 offset:2 %}{{ i }}{%endfor%}', assigns)
@@ -98,7 +98,7 @@ HERE
   end
 
   def test_dynamic_variable_limiting
-    assigns = {'array' => [1,2,3,4,5,6,7,8,9,0]}
+    assigns = { 'array' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] }
     assigns['limit'] = 2
     assigns['offset'] = 2
 
@@ -106,17 +106,17 @@ HERE
   end
 
   def test_nested_for
-    assigns = {'array' => [[1,2],[3,4],[5,6]] }
+    assigns = { 'array' => [[1, 2], [3, 4], [5, 6]] }
     assert_template_result('123456', '{%for item in array%}{%for i in item%}{{ i }}{%endfor%}{%endfor%}', assigns)
   end
 
   def test_offset_only
-    assigns = {'array' => [1,2,3,4,5,6,7,8,9,0]}
+    assigns = { 'array' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] }
     assert_template_result('890', '{%for i in array offset:7 %}{{ i }}{%endfor%}', assigns)
   end
 
   def test_pause_resume
-    assigns = {'array' => {'items' => [1,2,3,4,5,6,7,8,9,0]}}
+    assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] } }
     markup = <<-MKUP
       {%for i in array.items limit: 3 %}{{i}}{%endfor%}
       next
@@ -131,11 +131,11 @@ HERE
       next
       789
       XPCTD
-    assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
   end
 
   def test_pause_resume_limit
-    assigns = {'array' => {'items' => [1,2,3,4,5,6,7,8,9,0]}}
+    assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] } }
     markup = <<-MKUP
       {%for i in array.items limit:3 %}{{i}}{%endfor%}
       next
@@ -150,11 +150,11 @@ HERE
       next
       7
       XPCTD
-    assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
   end
 
   def test_pause_resume_BIG_limit
-    assigns = {'array' => {'items' => [1,2,3,4,5,6,7,8,9,0]}}
+    assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] } }
     markup = <<-MKUP
       {%for i in array.items limit:3 %}{{i}}{%endfor%}
       next
@@ -169,103 +169,102 @@ HERE
       next
       7890
       XPCTD
-      assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
   end
 
-
   def test_pause_resume_BIG_offset
-    assigns = {'array' => {'items' => [1,2,3,4,5,6,7,8,9,0]}}
-    markup = %q({%for i in array.items limit:3 %}{{i}}{%endfor%}
+    assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] } }
+    markup = '{%for i in array.items limit:3 %}{{i}}{%endfor%}
       next
       {%for i in array.items offset:continue limit:3 %}{{i}}{%endfor%}
       next
-      {%for i in array.items offset:continue limit:3 offset:1000 %}{{i}}{%endfor%})
-    expected = %q(123
+      {%for i in array.items offset:continue limit:3 offset:1000 %}{{i}}{%endfor%}'
+    expected = '123
       next
       456
       next
-      )
-      assert_template_result(expected,markup,assigns)
+      '
+    assert_template_result(expected, markup, assigns)
   end
 
   def test_for_with_break
-    assigns = {'array' => {'items' => [1,2,3,4,5,6,7,8,9,10]}}
+    assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] } }
 
     markup = '{% for i in array.items %}{% break %}{% endfor %}'
     expected = ""
-    assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{{ i }}{% break %}{% endfor %}'
     expected = "1"
-    assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{% break %}{{ i }}{% endfor %}'
     expected = ""
-    assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{{ i }}{% if i > 3 %}{% break %}{% endif %}{% endfor %}'
     expected = "1234"
-    assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
 
     # tests to ensure it only breaks out of the local for loop
     # and not all of them.
-    assigns = {'array' => [[1,2],[3,4],[5,6]] }
-    markup = '{% for item in array %}' +
-               '{% for i in item %}' +
-                 '{% if i == 1 %}' +
-                   '{% break %}' +
-                 '{% endif %}' +
-                 '{{ i }}' +
-               '{% endfor %}' +
+    assigns = { 'array' => [[1, 2], [3, 4], [5, 6]] }
+    markup = '{% for item in array %}' \
+               '{% for i in item %}' \
+                 '{% if i == 1 %}' \
+                   '{% break %}' \
+                 '{% endif %}' \
+                 '{{ i }}' \
+               '{% endfor %}' \
              '{% endfor %}'
     expected = '3456'
     assert_template_result(expected, markup, assigns)
 
     # test break does nothing when unreached
-    assigns = {'array' => {'items' => [1,2,3,4,5]}}
+    assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5] } }
     markup = '{% for i in array.items %}{% if i == 9999 %}{% break %}{% endif %}{{ i }}{% endfor %}'
     expected = '12345'
     assert_template_result(expected, markup, assigns)
   end
 
   def test_for_with_continue
-    assigns = {'array' => {'items' => [1,2,3,4,5]}}
+    assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5] } }
 
     markup = '{% for i in array.items %}{% continue %}{% endfor %}'
     expected = ""
-    assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{{ i }}{% continue %}{% endfor %}'
     expected = "12345"
-    assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{% continue %}{{ i }}{% endfor %}'
     expected = ""
-    assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{% if i > 3 %}{% continue %}{% endif %}{{ i }}{% endfor %}'
     expected = "123"
-    assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
 
     markup = '{% for i in array.items %}{% if i == 3 %}{% continue %}{% else %}{{ i }}{% endif %}{% endfor %}'
     expected = "1245"
-    assert_template_result(expected,markup,assigns)
+    assert_template_result(expected, markup, assigns)
 
     # tests to ensure it only continues the local for loop and not all of them.
-    assigns = {'array' => [[1,2],[3,4],[5,6]] }
-    markup = '{% for item in array %}' +
-               '{% for i in item %}' +
-                 '{% if i == 1 %}' +
-                   '{% continue %}' +
-                 '{% endif %}' +
-                 '{{ i }}' +
-               '{% endfor %}' +
+    assigns = { 'array' => [[1, 2], [3, 4], [5, 6]] }
+    markup = '{% for item in array %}' \
+               '{% for i in item %}' \
+                 '{% if i == 1 %}' \
+                   '{% continue %}' \
+                 '{% endif %}' \
+                 '{{ i }}' \
+               '{% endfor %}' \
              '{% endfor %}'
     expected = '23456'
     assert_template_result(expected, markup, assigns)
 
     # test continue does nothing when unreached
-    assigns = {'array' => {'items' => [1,2,3,4,5]}}
+    assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5] } }
     markup = '{% for i in array.items %}{% if i == 9999 %}{% continue %}{% endif %}{{ i }}{% endfor %}'
     expected = '12345'
     assert_template_result(expected, markup, assigns)
@@ -277,25 +276,45 @@ HERE
     # the functionality for backwards compatibility
 
     assert_template_result('test string',
-                '{%for val in string%}{{val}}{%endfor%}',
-                'string' => "test string")
+      '{%for val in string%}{{val}}{%endfor%}',
+      'string' => "test string")
 
     assert_template_result('test string',
-                '{%for val in string limit:1%}{{val}}{%endfor%}',
-                'string' => "test string")
+      '{%for val in string limit:1%}{{val}}{%endfor%}',
+      'string' => "test string")
 
     assert_template_result('val-string-1-1-0-1-0-true-true-test string',
-                '{%for val in string%}' +
-                '{{forloop.name}}-' +
-                '{{forloop.index}}-' +
-                '{{forloop.length}}-' +
-                '{{forloop.index0}}-' +
-                '{{forloop.rindex}}-' +
-                '{{forloop.rindex0}}-' +
-                '{{forloop.first}}-' +
-                '{{forloop.last}}-' +
-                '{{val}}{%endfor%}',
-                'string' => "test string")
+      '{%for val in string%}' \
+      '{{forloop.name}}-' \
+      '{{forloop.index}}-' \
+      '{{forloop.length}}-' \
+      '{{forloop.index0}}-' \
+      '{{forloop.rindex}}-' \
+      '{{forloop.rindex0}}-' \
+      '{{forloop.first}}-' \
+      '{{forloop.last}}-' \
+      '{{val}}{%endfor%}',
+      'string' => "test string")
+  end
+
+  def test_for_parentloop_references_parent_loop
+    assert_template_result('1.1 1.2 1.3 2.1 2.2 2.3 ',
+      '{% for inner in outer %}{% for k in inner %}' \
+      '{{ forloop.parentloop.index }}.{{ forloop.index }} ' \
+      '{% endfor %}{% endfor %}',
+      'outer' => [[1, 1, 1], [1, 1, 1]])
+  end
+
+  def test_for_parentloop_nil_when_not_present
+    assert_template_result('.1 .2 ',
+      '{% for inner in outer %}' \
+      '{{ forloop.parentloop.index }}.{{ forloop.index }} ' \
+      '{% endfor %}',
+      'outer' => [[1, 1, 1], [1, 1, 1]])
+  end
+
+  def test_inner_for_over_empty_input
+    assert_template_result 'oo', '{% for a in (1..2) %}o{% for b in empty %}{% endfor %}{% endfor %}'
   end
 
   def test_blank_string_not_iterable
@@ -311,7 +330,7 @@ HERE
   def test_spacing_with_variable_naming_in_for_loop
     expected = '12345'
     template = '{% for       item   in   items %}{{item}}{% endfor %}'
-    assigns  = {'items' => [1,2,3,4,5]}
+    assigns  = { 'items' => [1, 2, 3, 4, 5] }
     assert_template_result(expected, template, assigns)
   end
 
@@ -329,13 +348,13 @@ HERE
 
     def load_slice(from, to)
       @load_slice_called = true
-      @data[(from..to-1)]
+      @data[(from..to - 1)]
     end
   end
 
   def test_iterate_with_each_when_no_limit_applied
-    loader = LoaderDrop.new([1,2,3,4,5])
-    assigns = {'items' => loader}
+    loader = LoaderDrop.new([1, 2, 3, 4, 5])
+    assigns = { 'items' => loader }
     expected = '12345'
     template = '{% for item in items %}{{item}}{% endfor %}'
     assert_template_result(expected, template, assigns)
@@ -344,8 +363,8 @@ HERE
   end
 
   def test_iterate_with_load_slice_when_limit_applied
-    loader = LoaderDrop.new([1,2,3,4,5])
-    assigns = {'items' => loader}
+    loader = LoaderDrop.new([1, 2, 3, 4, 5])
+    assigns = { 'items' => loader }
     expected = '1'
     template = '{% for item in items limit:1 %}{{item}}{% endfor %}'
     assert_template_result(expected, template, assigns)
@@ -354,8 +373,8 @@ HERE
   end
 
   def test_iterate_with_load_slice_when_limit_and_offset_applied
-    loader = LoaderDrop.new([1,2,3,4,5])
-    assigns = {'items' => loader}
+    loader = LoaderDrop.new([1, 2, 3, 4, 5])
+    assigns = { 'items' => loader }
     expected = '34'
     template = '{% for item in items offset:2 limit:2 %}{{item}}{% endfor %}'
     assert_template_result(expected, template, assigns)
@@ -364,12 +383,22 @@ HERE
   end
 
   def test_iterate_with_load_slice_returns_same_results_as_without
-    loader = LoaderDrop.new([1,2,3,4,5])
-    loader_assigns = {'items' => loader}
-    array_assigns = {'items' => [1,2,3,4,5]}
+    loader = LoaderDrop.new([1, 2, 3, 4, 5])
+    loader_assigns = { 'items' => loader }
+    array_assigns = { 'items' => [1, 2, 3, 4, 5] }
     expected = '34'
     template = '{% for item in items offset:2 limit:2 %}{{item}}{% endfor %}'
     assert_template_result(expected, template, loader_assigns)
     assert_template_result(expected, template, array_assigns)
   end
+
+  def test_for_cleans_up_registers
+    context = Context.new(ErrorDrop.new)
+
+    assert_raises(StandardError) do
+      Liquid::Template.parse('{% for i in (1..2) %}{{ standard_error }}{% endfor %}').render!(context)
+    end
+
+    assert context.registers[:for_stack].empty?
+  end
 end

test/integration/tags/if_else_tag_test.rb

@@ -4,96 +4,100 @@ class IfElseTagTest < Minitest::Test
   include Liquid
 
   def test_if
-    assert_template_result('  ',' {% if false %} this text should not go into the output {% endif %} ')
+    assert_template_result('  ', ' {% if false %} this text should not go into the output {% endif %} ')
     assert_template_result('  this text should go into the output  ',
-                           ' {% if true %} this text should go into the output {% endif %} ')
-    assert_template_result('  you rock ?','{% if false %} you suck {% endif %} {% if true %} you rock {% endif %}?')
+      ' {% if true %} this text should go into the output {% endif %} ')
+    assert_template_result('  you rock ?', '{% if false %} you suck {% endif %} {% if true %} you rock {% endif %}?')
+  end
+
+  def test_literal_comparisons
+    assert_template_result(' NO ', '{% assign v = false %}{% if v %} YES {% else %} NO {% endif %}')
+    assert_template_result(' YES ', '{% assign v = nil %}{% if v == nil %} YES {% else %} NO {% endif %}')
   end
 
   def test_if_else
-    assert_template_result(' YES ','{% if false %} NO {% else %} YES {% endif %}')
-    assert_template_result(' YES ','{% if true %} YES {% else %} NO {% endif %}')
-    assert_template_result(' YES ','{% if "foo" %} YES {% else %} NO {% endif %}')
+    assert_template_result(' YES ', '{% if false %} NO {% else %} YES {% endif %}')
+    assert_template_result(' YES ', '{% if true %} YES {% else %} NO {% endif %}')
+    assert_template_result(' YES ', '{% if "foo" %} YES {% else %} NO {% endif %}')
   end
 
   def test_if_boolean
-    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => true)
+    assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => true)
   end
 
   def test_if_or
-    assert_template_result(' YES ','{% if a or b %} YES {% endif %}', 'a' => true, 'b' => true)
-    assert_template_result(' YES ','{% if a or b %} YES {% endif %}', 'a' => true, 'b' => false)
-    assert_template_result(' YES ','{% if a or b %} YES {% endif %}', 'a' => false, 'b' => true)
+    assert_template_result(' YES ', '{% if a or b %} YES {% endif %}', 'a' => true, 'b' => true)
+    assert_template_result(' YES ', '{% if a or b %} YES {% endif %}', 'a' => true, 'b' => false)
+    assert_template_result(' YES ', '{% if a or b %} YES {% endif %}', 'a' => false, 'b' => true)
     assert_template_result('',     '{% if a or b %} YES {% endif %}', 'a' => false, 'b' => false)
 
-    assert_template_result(' YES ','{% if a or b or c %} YES {% endif %}', 'a' => false, 'b' => false, 'c' => true)
+    assert_template_result(' YES ', '{% if a or b or c %} YES {% endif %}', 'a' => false, 'b' => false, 'c' => true)
     assert_template_result('',     '{% if a or b or c %} YES {% endif %}', 'a' => false, 'b' => false, 'c' => false)
   end
 
   def test_if_or_with_operators
-    assert_template_result(' YES ','{% if a == true or b == true %} YES {% endif %}', 'a' => true, 'b' => true)
-    assert_template_result(' YES ','{% if a == true or b == false %} YES {% endif %}', 'a' => true, 'b' => true)
-    assert_template_result('','{% if a == false or b == false %} YES {% endif %}', 'a' => true, 'b' => true)
+    assert_template_result(' YES ', '{% if a == true or b == true %} YES {% endif %}', 'a' => true, 'b' => true)
+    assert_template_result(' YES ', '{% if a == true or b == false %} YES {% endif %}', 'a' => true, 'b' => true)
+    assert_template_result('', '{% if a == false or b == false %} YES {% endif %}', 'a' => true, 'b' => true)
   end
 
   def test_comparison_of_strings_containing_and_or_or
     awful_markup = "a == 'and' and b == 'or' and c == 'foo and bar' and d == 'bar or baz' and e == 'foo' and foo and bar"
-    assigns = {'a' => 'and', 'b' => 'or', 'c' => 'foo and bar', 'd' => 'bar or baz', 'e' => 'foo', 'foo' => true, 'bar' => true}
-    assert_template_result(' YES ',"{% if #{awful_markup} %} YES {% endif %}", assigns)
+    assigns = { 'a' => 'and', 'b' => 'or', 'c' => 'foo and bar', 'd' => 'bar or baz', 'e' => 'foo', 'foo' => true, 'bar' => true }
+    assert_template_result(' YES ', "{% if #{awful_markup} %} YES {% endif %}", assigns)
   end
 
   def test_comparison_of_expressions_starting_with_and_or_or
-    assigns = {'order' => {'items_count' => 0}, 'android' => {'name' => 'Roy'}}
-    assert_template_result( "YES",
-                            "{% if android.name == 'Roy' %}YES{% endif %}",
-                            assigns)
-    assert_template_result( "YES",
-                            "{% if order.items_count == 0 %}YES{% endif %}",
-                            assigns)
+    assigns = { 'order' => { 'items_count' => 0 }, 'android' => { 'name' => 'Roy' } }
+    assert_template_result("YES",
+      "{% if android.name == 'Roy' %}YES{% endif %}",
+      assigns)
+    assert_template_result("YES",
+      "{% if order.items_count == 0 %}YES{% endif %}",
+      assigns)
   end
 
   def test_if_and
-    assert_template_result(' YES ','{% if true and true %} YES {% endif %}')
-    assert_template_result('','{% if false and true %} YES {% endif %}')
-    assert_template_result('','{% if false and true %} YES {% endif %}')
+    assert_template_result(' YES ', '{% if true and true %} YES {% endif %}')
+    assert_template_result('', '{% if false and true %} YES {% endif %}')
+    assert_template_result('', '{% if false and true %} YES {% endif %}')
   end
 
-
   def test_hash_miss_generates_false
-    assert_template_result('','{% if foo.bar %} NO {% endif %}', 'foo' => {})
+    assert_template_result('', '{% if foo.bar %} NO {% endif %}', 'foo' => {})
   end
 
   def test_if_from_variable
-    assert_template_result('','{% if var %} NO {% endif %}', 'var' => false)
-    assert_template_result('','{% if var %} NO {% endif %}', 'var' => nil)
-    assert_template_result('','{% if foo.bar %} NO {% endif %}', 'foo' => {'bar' => false})
-    assert_template_result('','{% if foo.bar %} NO {% endif %}', 'foo' => {})
-    assert_template_result('','{% if foo.bar %} NO {% endif %}', 'foo' => nil)
-    assert_template_result('','{% if foo.bar %} NO {% endif %}', 'foo' => true)
+    assert_template_result('', '{% if var %} NO {% endif %}', 'var' => false)
+    assert_template_result('', '{% if var %} NO {% endif %}', 'var' => nil)
+    assert_template_result('', '{% if foo.bar %} NO {% endif %}', 'foo' => { 'bar' => false })
+    assert_template_result('', '{% if foo.bar %} NO {% endif %}', 'foo' => {})
+    assert_template_result('', '{% if foo.bar %} NO {% endif %}', 'foo' => nil)
+    assert_template_result('', '{% if foo.bar %} NO {% endif %}', 'foo' => true)
 
-    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => "text")
-    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => true)
-    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => 1)
-    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => {})
-    assert_template_result(' YES ','{% if var %} YES {% endif %}', 'var' => [])
-    assert_template_result(' YES ','{% if "foo" %} YES {% endif %}')
-    assert_template_result(' YES ','{% if foo.bar %} YES {% endif %}', 'foo' => {'bar' => true})
-    assert_template_result(' YES ','{% if foo.bar %} YES {% endif %}', 'foo' => {'bar' => "text"})
-    assert_template_result(' YES ','{% if foo.bar %} YES {% endif %}', 'foo' => {'bar' => 1 })
-    assert_template_result(' YES ','{% if foo.bar %} YES {% endif %}', 'foo' => {'bar' => {} })
-    assert_template_result(' YES ','{% if foo.bar %} YES {% endif %}', 'foo' => {'bar' => [] })
+    assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => "text")
+    assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => true)
+    assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => 1)
+    assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => {})
+    assert_template_result(' YES ', '{% if var %} YES {% endif %}', 'var' => [])
+    assert_template_result(' YES ', '{% if "foo" %} YES {% endif %}')
+    assert_template_result(' YES ', '{% if foo.bar %} YES {% endif %}', 'foo' => { 'bar' => true })
+    assert_template_result(' YES ', '{% if foo.bar %} YES {% endif %}', 'foo' => { 'bar' => "text" })
+    assert_template_result(' YES ', '{% if foo.bar %} YES {% endif %}', 'foo' => { 'bar' => 1 })
+    assert_template_result(' YES ', '{% if foo.bar %} YES {% endif %}', 'foo' => { 'bar' => {} })
+    assert_template_result(' YES ', '{% if foo.bar %} YES {% endif %}', 'foo' => { 'bar' => [] })
 
-    assert_template_result(' YES ','{% if var %} NO {% else %} YES {% endif %}', 'var' => false)
-    assert_template_result(' YES ','{% if var %} NO {% else %} YES {% endif %}', 'var' => nil)
-    assert_template_result(' YES ','{% if var %} YES {% else %} NO {% endif %}', 'var' => true)
-    assert_template_result(' YES ','{% if "foo" %} YES {% else %} NO {% endif %}', 'var' => "text")
+    assert_template_result(' YES ', '{% if var %} NO {% else %} YES {% endif %}', 'var' => false)
+    assert_template_result(' YES ', '{% if var %} NO {% else %} YES {% endif %}', 'var' => nil)
+    assert_template_result(' YES ', '{% if var %} YES {% else %} NO {% endif %}', 'var' => true)
+    assert_template_result(' YES ', '{% if "foo" %} YES {% else %} NO {% endif %}', 'var' => "text")
 
-    assert_template_result(' YES ','{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => {'bar' => false})
-    assert_template_result(' YES ','{% if foo.bar %} YES {% else %} NO {% endif %}', 'foo' => {'bar' => true})
-    assert_template_result(' YES ','{% if foo.bar %} YES {% else %} NO {% endif %}', 'foo' => {'bar' => "text"})
-    assert_template_result(' YES ','{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => {'notbar' => true})
-    assert_template_result(' YES ','{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => {})
-    assert_template_result(' YES ','{% if foo.bar %} NO {% else %} YES {% endif %}', 'notfoo' => {'bar' => true})
+    assert_template_result(' YES ', '{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => { 'bar' => false })
+    assert_template_result(' YES ', '{% if foo.bar %} YES {% else %} NO {% endif %}', 'foo' => { 'bar' => true })
+    assert_template_result(' YES ', '{% if foo.bar %} YES {% else %} NO {% endif %}', 'foo' => { 'bar' => "text" })
+    assert_template_result(' YES ', '{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => { 'notbar' => true })
+    assert_template_result(' YES ', '{% if foo.bar %} NO {% else %} YES {% endif %}', 'foo' => {})
+    assert_template_result(' YES ', '{% if foo.bar %} NO {% else %} YES {% endif %}', 'notfoo' => { 'bar' => true })
   end
 
   def test_nested_if
@@ -105,31 +109,30 @@ class IfElseTagTest < Minitest::Test
     assert_template_result(' YES ', '{% if true %}{% if true %} YES {% else %} NO {% endif %}{% else %} NO {% endif %}')
     assert_template_result(' YES ', '{% if true %}{% if false %} NO {% else %} YES {% endif %}{% else %} NO {% endif %}')
     assert_template_result(' YES ', '{% if false %}{% if true %} NO {% else %} NONO {% endif %}{% else %} YES {% endif %}')
-
   end
 
   def test_comparisons_on_null
-    assert_template_result('','{% if null < 10 %} NO {% endif %}')
-    assert_template_result('','{% if null <= 10 %} NO {% endif %}')
-    assert_template_result('','{% if null >= 10 %} NO {% endif %}')
-    assert_template_result('','{% if null > 10 %} NO {% endif %}')
+    assert_template_result('', '{% if null < 10 %} NO {% endif %}')
+    assert_template_result('', '{% if null <= 10 %} NO {% endif %}')
+    assert_template_result('', '{% if null >= 10 %} NO {% endif %}')
+    assert_template_result('', '{% if null > 10 %} NO {% endif %}')
 
-    assert_template_result('','{% if 10 < null %} NO {% endif %}')
-    assert_template_result('','{% if 10 <= null %} NO {% endif %}')
-    assert_template_result('','{% if 10 >= null %} NO {% endif %}')
-    assert_template_result('','{% if 10 > null %} NO {% endif %}')
+    assert_template_result('', '{% if 10 < null %} NO {% endif %}')
+    assert_template_result('', '{% if 10 <= null %} NO {% endif %}')
+    assert_template_result('', '{% if 10 >= null %} NO {% endif %}')
+    assert_template_result('', '{% if 10 > null %} NO {% endif %}')
   end
 
   def test_else_if
-    assert_template_result('0','{% if 0 == 0 %}0{% elsif 1 == 1%}1{% else %}2{% endif %}')
-    assert_template_result('1','{% if 0 != 0 %}0{% elsif 1 == 1%}1{% else %}2{% endif %}')
-    assert_template_result('2','{% if 0 != 0 %}0{% elsif 1 != 1%}1{% else %}2{% endif %}')
+    assert_template_result('0', '{% if 0 == 0 %}0{% elsif 1 == 1%}1{% else %}2{% endif %}')
+    assert_template_result('1', '{% if 0 != 0 %}0{% elsif 1 == 1%}1{% else %}2{% endif %}')
+    assert_template_result('2', '{% if 0 != 0 %}0{% elsif 1 != 1%}1{% else %}2{% endif %}')
 
-    assert_template_result('elsif','{% if false %}if{% elsif true %}elsif{% endif %}')
+    assert_template_result('elsif', '{% if false %}if{% elsif true %}elsif{% endif %}')
   end
 
   def test_syntax_error_no_variable
-    assert_raises(SyntaxError){ assert_template_result('', '{% if jerry == 1 %}')}
+    assert_raises(SyntaxError){ assert_template_result('', '{% if jerry == 1 %}') }
   end
 
   def test_syntax_error_no_expression
@@ -151,7 +154,7 @@ class IfElseTagTest < Minitest::Test
     Condition.operators['contains'] = :[]
 
     assert_template_result('yes',
-                           %({% if 'gnomeslab-and-or-liquid' contains 'gnomeslab-and-or-liquid' %}yes{% endif %}))
+      %({% if 'gnomeslab-and-or-liquid' contains 'gnomeslab-and-or-liquid' %}yes{% endif %}))
   ensure
     Condition.operators['contains'] = original_op
   end

test/integration/tags/include_tag_test.rb

@@ -1,7 +1,7 @@
 require 'test_helper'
 
 class TestFileSystem
-  def read_template_file(template_path, context)
+  def read_template_file(template_path)
     case template_path
     when "product"
       "Product: {{ product.title }} "
@@ -27,6 +27,9 @@ class TestFileSystem
     when "pick_a_source"
       "from TestFileSystem"
 
+    when 'assignments'
+      "{% assign foo = 'bar' %}"
+
     else
       template_path
     end
@@ -34,14 +37,14 @@ class TestFileSystem
 end
 
 class OtherFileSystem
-  def read_template_file(template_path, context)
+  def read_template_file(template_path)
     'from OtherFileSystem'
   end
 end
 
 class CountingFileSystem
   attr_reader :count
-  def read_template_file(template_path, context)
+  def read_template_file(template_path)
     @count ||= 0
     @count += 1
     'from CountingFileSystem'
@@ -74,23 +77,22 @@ class IncludeTagTest < Minitest::Test
 
   def test_include_tag_looks_for_file_system_in_registers_first
     assert_equal 'from OtherFileSystem',
-      Template.parse("{% include 'pick_a_source' %}").render!({}, :registers => {:file_system => OtherFileSystem.new})
+      Template.parse("{% include 'pick_a_source' %}").render!({}, :registers => { :file_system => OtherFileSystem.new })
   end
 
-
   def test_include_tag_with
     assert_template_result "Product: Draft 151cm ",
-      "{% include 'product' with products[0] %}", "products" => [ {'title' => 'Draft 151cm'}, {'title' => 'Element 155cm'} ]
+      "{% include 'product' with products[0] %}", "products" => [ { 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' } ]
   end
 
   def test_include_tag_with_default_name
     assert_template_result "Product: Draft 151cm ",
-      "{% include 'product' %}", "product" => {'title' => 'Draft 151cm'}
+      "{% include 'product' %}", "product" => { 'title' => 'Draft 151cm' }
   end
 
   def test_include_tag_for
     assert_template_result "Product: Draft 151cm Product: Element 155cm ",
-      "{% include 'product' for products %}", "products" => [ {'title' => 'Draft 151cm'}, {'title' => 'Element 155cm'} ]
+      "{% include 'product' for products %}", "products" => [ { 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' } ]
   end
 
   def test_include_tag_with_local_variables
@@ -105,7 +107,11 @@ class IncludeTagTest < Minitest::Test
   def test_include_tag_with_multiple_local_variables_from_context
     assert_template_result "Locale: test123 test321",
       "{% include 'locale_variables' echo1: echo1, echo2: more_echos.echo2 %}",
-      'echo1' => 'test123', 'more_echos' => { "echo2" => 'test321'}
+      'echo1' => 'test123', 'more_echos' => { "echo2" => 'test321' }
+  end
+
+  def test_included_templates_assigns_variables
+    assert_template_result "bar", "{% include 'assignments' %}{{ foo }}"
   end
 
   def test_nested_include_tag
@@ -116,16 +122,15 @@ class IncludeTagTest < Minitest::Test
 
   def test_nested_include_with_variable
     assert_template_result "Product: Draft 151cm details ",
-      "{% include 'nested_product_template' with product %}", "product" => {"title" => 'Draft 151cm'}
+      "{% include 'nested_product_template' with product %}", "product" => { "title" => 'Draft 151cm' }
 
     assert_template_result "Product: Draft 151cm details Product: Element 155cm details ",
-      "{% include 'nested_product_template' for products %}", "products" => [{"title" => 'Draft 151cm'}, {"title" => 'Element 155cm'}]
+      "{% include 'nested_product_template' for products %}", "products" => [{ "title" => 'Draft 151cm' }, { "title" => 'Element 155cm' }]
   end
 
   def test_recursively_included_template_does_not_produce_endless_loop
-
     infinite_file_system = Class.new do
-      def read_template_file(template_path, context)
+      def read_template_file(template_path)
         "-{% include 'loop' %}"
       end
     end
@@ -135,19 +140,6 @@ class IncludeTagTest < Minitest::Test
     assert_raises(Liquid::StackLevelError, SystemStackError) do
       Template.parse("{% include 'loop' %}").render!
     end
-
-  end
-
-  def test_backwards_compatability_support_for_overridden_read_template_file
-    infinite_file_system = Class.new do
-      def read_template_file(template_path) # testing only one argument here.
-        "- hi mom"
-      end
-    end
-
-    Liquid::Template.file_system = infinite_file_system.new
-
-    Template.parse("{% include 'hi_mom' %}").render!
   end
 
   def test_dynamically_choosen_template
@@ -155,24 +147,24 @@ class IncludeTagTest < Minitest::Test
     assert_template_result "Test321", "{% include template %}", "template" => 'Test321'
 
     assert_template_result "Product: Draft 151cm ", "{% include template for product %}",
-      "template" => 'product', 'product' => { 'title' => 'Draft 151cm'}
+      "template" => 'product', 'product' => { 'title' => 'Draft 151cm' }
   end
 
   def test_include_tag_caches_second_read_of_same_partial
     file_system = CountingFileSystem.new
     assert_equal 'from CountingFileSystemfrom CountingFileSystem',
-      Template.parse("{% include 'pick_a_source' %}{% include 'pick_a_source' %}").render!({}, :registers => {:file_system => file_system})
+      Template.parse("{% include 'pick_a_source' %}{% include 'pick_a_source' %}").render!({}, :registers => { :file_system => file_system })
     assert_equal 1, file_system.count
   end
 
   def test_include_tag_doesnt_cache_partials_across_renders
     file_system = CountingFileSystem.new
     assert_equal 'from CountingFileSystem',
-      Template.parse("{% include 'pick_a_source' %}").render!({}, :registers => {:file_system => file_system})
+      Template.parse("{% include 'pick_a_source' %}").render!({}, :registers => { :file_system => file_system })
     assert_equal 1, file_system.count
 
     assert_equal 'from CountingFileSystem',
-      Template.parse("{% include 'pick_a_source' %}").render!({}, :registers => {:file_system => file_system})
+      Template.parse("{% include 'pick_a_source' %}").render!({}, :registers => { :file_system => file_system })
     assert_equal 2, file_system.count
   end
 
@@ -224,4 +216,12 @@ class IncludeTagTest < Minitest::Test
       assert_equal 'x', Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: [:error_mode]).render!("template" => '{{ "X" || downcase }}')
     end
   end
+
+  def test_including_via_variable_value
+    assert_template_result "from TestFileSystem", "{% assign page = 'pick_a_source' %}{% include page %}"
+
+    assert_template_result "Product: Draft 151cm ", "{% assign page = 'product' %}{% include page %}", "product" => { 'title' => 'Draft 151cm' }
+
+    assert_template_result "Product: Draft 151cm ", "{% assign page = 'product' %}{% include page for foo %}", "foo" => { 'title' => 'Draft 151cm' }
+  end
 end # IncludeTagTest

test/integration/tags/increment_tag_test.rb

@@ -4,21 +4,21 @@ class IncrementTagTest < Minitest::Test
   include Liquid
 
   def test_inc
-    assert_template_result('0','{%increment port %}', {})
-    assert_template_result('0 1','{%increment port %} {%increment port%}', {})
+    assert_template_result('0', '{%increment port %}', {})
+    assert_template_result('0 1', '{%increment port %} {%increment port%}', {})
     assert_template_result('0 0 1 2 1',
-                           '{%increment port %} {%increment starboard%} ' +
-                           '{%increment port %} {%increment port%} ' +
-                           '{%increment starboard %}', {})
+      '{%increment port %} {%increment starboard%} ' \
+      '{%increment port %} {%increment port%} ' \
+      '{%increment starboard %}', {})
   end
 
   def test_dec
-    assert_template_result('9','{%decrement port %}', { 'port' => 10})
-    assert_template_result('-1 -2','{%decrement port %} {%decrement port%}', {})
+    assert_template_result('9', '{%decrement port %}', { 'port' => 10 })
+    assert_template_result('-1 -2', '{%decrement port %} {%decrement port%}', {})
     assert_template_result('1 5 2 2 5',
-                           '{%increment port %} {%increment starboard%} ' +
-                           '{%increment port %} {%decrement port%} ' +
-                           '{%decrement starboard %}', { 'port' => 1, 'starboard' => 5 })
+      '{%increment port %} {%increment starboard%} ' \
+      '{%increment port %} {%decrement port%} ' \
+      '{%decrement starboard %}', { 'port' => 1, 'starboard' => 5 })
   end
 
 end

test/integration/tags/raw_tag_test.rb

@@ -5,7 +5,7 @@ class RawTagTest < Minitest::Test
 
   def test_tag_in_raw
     assert_template_result '{% comment %} test {% endcomment %}',
-                           '{% raw %}{% comment %} test {% endcomment %}{% endraw %}'
+      '{% raw %}{% comment %} test {% endcomment %}{% endraw %}'
   end
 
   def test_output_in_raw

test/integration/tags/standard_tag_test.rb

@@ -5,116 +5,116 @@ class StandardTagTest < Minitest::Test
 
   def test_no_transform
     assert_template_result('this text should come out of the template without change...',
-                           'this text should come out of the template without change...')
+      'this text should come out of the template without change...')
 
-    assert_template_result('blah','blah')
-    assert_template_result('<blah>','<blah>')
-    assert_template_result('|,.:','|,.:')
-    assert_template_result('','')
+    assert_template_result('blah', 'blah')
+    assert_template_result('<blah>', '<blah>')
+    assert_template_result('|,.:', '|,.:')
+    assert_template_result('', '')
 
-    text = %|this shouldnt see any transformation either but has multiple lines
-              as you can clearly see here ...|
-    assert_template_result(text,text)
+    text = %(this shouldnt see any transformation either but has multiple lines
+              as you can clearly see here ...)
+    assert_template_result(text, text)
   end
 
   def test_has_a_block_which_does_nothing
-    assert_template_result(%|the comment block should be removed  .. right?|,
-                           %|the comment block should be removed {%comment%} be gone.. {%endcomment%} .. right?|)
+    assert_template_result(%(the comment block should be removed  .. right?),
+      %(the comment block should be removed {%comment%} be gone.. {%endcomment%} .. right?))
 
-    assert_template_result('','{%comment%}{%endcomment%}')
-    assert_template_result('','{%comment%}{% endcomment %}')
-    assert_template_result('','{% comment %}{%endcomment%}')
-    assert_template_result('','{% comment %}{% endcomment %}')
-    assert_template_result('','{%comment%}comment{%endcomment%}')
-    assert_template_result('','{% comment %}comment{% endcomment %}')
-    assert_template_result('','{% comment %} 1 {% comment %} 2 {% endcomment %} 3 {% endcomment %}')
+    assert_template_result('', '{%comment%}{%endcomment%}')
+    assert_template_result('', '{%comment%}{% endcomment %}')
+    assert_template_result('', '{% comment %}{%endcomment%}')
+    assert_template_result('', '{% comment %}{% endcomment %}')
+    assert_template_result('', '{%comment%}comment{%endcomment%}')
+    assert_template_result('', '{% comment %}comment{% endcomment %}')
+    assert_template_result('', '{% comment %} 1 {% comment %} 2 {% endcomment %} 3 {% endcomment %}')
 
-    assert_template_result('','{%comment%}{%blabla%}{%endcomment%}')
-    assert_template_result('','{% comment %}{% blabla %}{% endcomment %}')
-    assert_template_result('','{%comment%}{% endif %}{%endcomment%}')
-    assert_template_result('','{% comment %}{% endwhatever %}{% endcomment %}')
-    assert_template_result('','{% comment %}{% raw %} {{%%%%}}  }} { {% endcomment %} {% comment {% endraw %} {% endcomment %}')
+    assert_template_result('', '{%comment%}{%blabla%}{%endcomment%}')
+    assert_template_result('', '{% comment %}{% blabla %}{% endcomment %}')
+    assert_template_result('', '{%comment%}{% endif %}{%endcomment%}')
+    assert_template_result('', '{% comment %}{% endwhatever %}{% endcomment %}')
+    assert_template_result('', '{% comment %}{% raw %} {{%%%%}}  }} { {% endcomment %} {% comment {% endraw %} {% endcomment %}')
 
-    assert_template_result('foobar','foo{%comment%}comment{%endcomment%}bar')
-    assert_template_result('foobar','foo{% comment %}comment{% endcomment %}bar')
-    assert_template_result('foobar','foo{%comment%} comment {%endcomment%}bar')
-    assert_template_result('foobar','foo{% comment %} comment {% endcomment %}bar')
+    assert_template_result('foobar', 'foo{%comment%}comment{%endcomment%}bar')
+    assert_template_result('foobar', 'foo{% comment %}comment{% endcomment %}bar')
+    assert_template_result('foobar', 'foo{%comment%} comment {%endcomment%}bar')
+    assert_template_result('foobar', 'foo{% comment %} comment {% endcomment %}bar')
 
-    assert_template_result('foo  bar','foo {%comment%} {%endcomment%} bar')
-    assert_template_result('foo  bar','foo {%comment%}comment{%endcomment%} bar')
-    assert_template_result('foo  bar','foo {%comment%} comment {%endcomment%} bar')
+    assert_template_result('foo  bar', 'foo {%comment%} {%endcomment%} bar')
+    assert_template_result('foo  bar', 'foo {%comment%}comment{%endcomment%} bar')
+    assert_template_result('foo  bar', 'foo {%comment%} comment {%endcomment%} bar')
 
-    assert_template_result('foobar','foo{%comment%}
+    assert_template_result('foobar', 'foo{%comment%}
                                      {%endcomment%}bar')
   end
 
   def test_hyphenated_assign
-    assigns = {'a-b' => '1' }
+    assigns = { 'a-b' => '1' }
     assert_template_result('a-b:1 a-b:2', 'a-b:{{a-b}} {%assign a-b = 2 %}a-b:{{a-b}}', assigns)
   end
 
   def test_assign_with_colon_and_spaces
-    assigns = {'var' => {'a:b c' => {'paged' => '1' }}}
+    assigns = { 'var' => { 'a:b c' => { 'paged' => '1' } } }
     assert_template_result('var2: 1', '{%assign var2 = var["a:b c"].paged %}var2: {{var2}}', assigns)
   end
 
   def test_capture
-    assigns = {'var' => 'content' }
+    assigns = { 'var' => 'content' }
     assert_template_result('content foo content foo ',
-                           '{{ var2 }}{% capture var2 %}{{ var }} foo {% endcapture %}{{ var2 }}{{ var2 }}',
-                           assigns)
+      '{{ var2 }}{% capture var2 %}{{ var }} foo {% endcapture %}{{ var2 }}{{ var2 }}',
+      assigns)
   end
 
   def test_capture_detects_bad_syntax
     assert_raises(SyntaxError) do
       assert_template_result('content foo content foo ',
-                             '{{ var2 }}{% capture %}{{ var }} foo {% endcapture %}{{ var2 }}{{ var2 }}',
-                             {'var' => 'content' })
+        '{{ var2 }}{% capture %}{{ var }} foo {% endcapture %}{{ var2 }}{{ var2 }}',
+        { 'var' => 'content' })
     end
   end
 
   def test_case
-    assigns = {'condition' => 2 }
+    assigns = { 'condition' => 2 }
     assert_template_result(' its 2 ',
-                           '{% case condition %}{% when 1 %} its 1 {% when 2 %} its 2 {% endcase %}',
-                           assigns)
+      '{% case condition %}{% when 1 %} its 1 {% when 2 %} its 2 {% endcase %}',
+      assigns)
 
-    assigns = {'condition' => 1 }
+    assigns = { 'condition' => 1 }
     assert_template_result(' its 1 ',
-                           '{% case condition %}{% when 1 %} its 1 {% when 2 %} its 2 {% endcase %}',
-                           assigns)
+      '{% case condition %}{% when 1 %} its 1 {% when 2 %} its 2 {% endcase %}',
+      assigns)
 
-    assigns = {'condition' => 3 }
+    assigns = { 'condition' => 3 }
     assert_template_result('',
-                           '{% case condition %}{% when 1 %} its 1 {% when 2 %} its 2 {% endcase %}',
-                           assigns)
+      '{% case condition %}{% when 1 %} its 1 {% when 2 %} its 2 {% endcase %}',
+      assigns)
 
-    assigns = {'condition' => "string here" }
+    assigns = { 'condition' => "string here" }
     assert_template_result(' hit ',
-                           '{% case condition %}{% when "string here" %} hit {% endcase %}',
-                           assigns)
+      '{% case condition %}{% when "string here" %} hit {% endcase %}',
+      assigns)
 
-    assigns = {'condition' => "bad string here" }
+    assigns = { 'condition' => "bad string here" }
     assert_template_result('',
-                           '{% case condition %}{% when "string here" %} hit {% endcase %}',\
-                           assigns)
+      '{% case condition %}{% when "string here" %} hit {% endcase %}',\
+      assigns)
   end
 
   def test_case_with_else
-    assigns = {'condition' => 5 }
+    assigns = { 'condition' => 5 }
     assert_template_result(' hit ',
-                           '{% case condition %}{% when 5 %} hit {% else %} else {% endcase %}',
-                           assigns)
+      '{% case condition %}{% when 5 %} hit {% else %} else {% endcase %}',
+      assigns)
 
-    assigns = {'condition' => 6 }
+    assigns = { 'condition' => 6 }
     assert_template_result(' else ',
-                           '{% case condition %}{% when 5 %} hit {% else %} else {% endcase %}',
-                           assigns)
+      '{% case condition %}{% when 5 %} hit {% else %} else {% endcase %}',
+      assigns)
 
-    assigns = {'condition' => 6 }
+    assigns = { 'condition' => 6 }
     assert_template_result(' else ',
-                           '{% case condition %} {% when 5 %} hit {% else %} else {% endcase %}',
-                           assigns)
+      '{% case condition %} {% when 5 %} hit {% else %} else {% endcase %}',
+      assigns)
   end
 
   def test_case_on_size
@@ -128,87 +128,87 @@ class StandardTagTest < Minitest::Test
 
   def test_case_on_size_with_else
     assert_template_result('else',
-                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
-                           'a' => [])
+      '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+      'a' => [])
 
     assert_template_result('1',
-                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
-                           'a' => [1])
+      '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+      'a' => [1])
 
     assert_template_result('2',
-                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
-                           'a' => [1, 1])
+      '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+      'a' => [1, 1])
 
     assert_template_result('else',
-                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
-                           'a' => [1, 1, 1])
+      '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+      'a' => [1, 1, 1])
 
     assert_template_result('else',
-                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
-                           'a' => [1, 1, 1, 1])
+      '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+      'a' => [1, 1, 1, 1])
 
     assert_template_result('else',
-                           '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
-                           'a' => [1, 1, 1, 1, 1])
+      '{% case a.size %}{% when 1 %}1{% when 2 %}2{% else %}else{% endcase %}',
+      'a' => [1, 1, 1, 1, 1])
   end
 
   def test_case_on_length_with_else
     assert_template_result('else',
-                           '{% case a.empty? %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
-                           {})
+      '{% case a.empty? %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
+      {})
 
     assert_template_result('false',
-                           '{% case false %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
-                           {})
+      '{% case false %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
+      {})
 
     assert_template_result('true',
-                           '{% case true %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
-                           {})
+      '{% case true %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
+      {})
 
     assert_template_result('else',
-                           '{% case NULL %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
-                           {})
+      '{% case NULL %}{% when true %}true{% when false %}false{% else %}else{% endcase %}',
+      {})
   end
 
   def test_assign_from_case
     # Example from the shopify forums
-    code = %q({% case collection.handle %}{% when 'menswear-jackets' %}{% assign ptitle = 'menswear' %}{% when 'menswear-t-shirts' %}{% assign ptitle = 'menswear' %}{% else %}{% assign ptitle = 'womenswear' %}{% endcase %}{{ ptitle }})
+    code = "{% case collection.handle %}{% when 'menswear-jackets' %}{% assign ptitle = 'menswear' %}{% when 'menswear-t-shirts' %}{% assign ptitle = 'menswear' %}{% else %}{% assign ptitle = 'womenswear' %}{% endcase %}{{ ptitle }}"
     template = Liquid::Template.parse(code)
-    assert_equal "menswear",   template.render!("collection" => {'handle' => 'menswear-jackets'})
-    assert_equal "menswear",   template.render!("collection" => {'handle' => 'menswear-t-shirts'})
-    assert_equal "womenswear", template.render!("collection" => {'handle' => 'x'})
-    assert_equal "womenswear", template.render!("collection" => {'handle' => 'y'})
-    assert_equal "womenswear", template.render!("collection" => {'handle' => 'z'})
+    assert_equal "menswear",   template.render!("collection" => { 'handle' => 'menswear-jackets' })
+    assert_equal "menswear",   template.render!("collection" => { 'handle' => 'menswear-t-shirts' })
+    assert_equal "womenswear", template.render!("collection" => { 'handle' => 'x' })
+    assert_equal "womenswear", template.render!("collection" => { 'handle' => 'y' })
+    assert_equal "womenswear", template.render!("collection" => { 'handle' => 'z' })
   end
 
   def test_case_when_or
     code = '{% case condition %}{% when 1 or 2 or 3 %} its 1 or 2 or 3 {% when 4 %} its 4 {% endcase %}'
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 1 })
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 2 })
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 3 })
-    assert_template_result(' its 4 ', code, {'condition' => 4 })
-    assert_template_result('', code, {'condition' => 5 })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => 1 })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => 2 })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => 3 })
+    assert_template_result(' its 4 ', code, { 'condition' => 4 })
+    assert_template_result('', code, { 'condition' => 5 })
 
     code = '{% case condition %}{% when 1 or "string" or null %} its 1 or 2 or 3 {% when 4 %} its 4 {% endcase %}'
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 1 })
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 'string' })
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => nil })
-    assert_template_result('', code, {'condition' => 'something else' })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => 1 })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => 'string' })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => nil })
+    assert_template_result('', code, { 'condition' => 'something else' })
   end
 
   def test_case_when_comma
     code = '{% case condition %}{% when 1, 2, 3 %} its 1 or 2 or 3 {% when 4 %} its 4 {% endcase %}'
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 1 })
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 2 })
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 3 })
-    assert_template_result(' its 4 ', code, {'condition' => 4 })
-    assert_template_result('', code, {'condition' => 5 })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => 1 })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => 2 })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => 3 })
+    assert_template_result(' its 4 ', code, { 'condition' => 4 })
+    assert_template_result('', code, { 'condition' => 5 })
 
     code = '{% case condition %}{% when 1, "string", null %} its 1 or 2 or 3 {% when 4 %} its 4 {% endcase %}'
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 1 })
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => 'string' })
-    assert_template_result(' its 1 or 2 or 3 ', code, {'condition' => nil })
-    assert_template_result('', code, {'condition' => 'something else' })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => 1 })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => 'string' })
+    assert_template_result(' its 1 or 2 or 3 ', code, { 'condition' => nil })
+    assert_template_result('', code, { 'condition' => 'something else' })
   end
 
   def test_assign
@@ -236,15 +236,14 @@ class StandardTagTest < Minitest::Test
     assert_raises(SyntaxError) do
       assert_template_result('',  '{% case false %}{% huh %}true{% endcase %}', {})
     end
-
   end
 
   def test_cycle
-    assert_template_result('one','{%cycle "one", "two"%}')
-    assert_template_result('one two','{%cycle "one", "two"%} {%cycle "one", "two"%}')
-    assert_template_result(' two','{%cycle "", "two"%} {%cycle "", "two"%}')
+    assert_template_result('one', '{%cycle "one", "two"%}')
+    assert_template_result('one two', '{%cycle "one", "two"%} {%cycle "one", "two"%}')
+    assert_template_result(' two', '{%cycle "", "two"%} {%cycle "", "two"%}')
 
-    assert_template_result('one two one','{%cycle "one", "two"%} {%cycle "one", "two"%} {%cycle "one", "two"%}')
+    assert_template_result('one two one', '{%cycle "one", "two"%} {%cycle "one", "two"%} {%cycle "one", "two"%}')
 
     assert_template_result('text-align: left text-align: right',
       '{%cycle "text-align: left", "text-align: right" %} {%cycle "text-align: left", "text-align: right"%}')
@@ -261,18 +260,18 @@ class StandardTagTest < Minitest::Test
   end
 
   def test_multiple_named_cycles_with_names_from_context
-    assigns = {"var1" => 1, "var2" => 2 }
+    assigns = { "var1" => 1, "var2" => 2 }
     assert_template_result('one one two two one one',
       '{%cycle var1: "one", "two" %} {%cycle var2: "one", "two" %} {%cycle var1: "one", "two" %} {%cycle var2: "one", "two" %} {%cycle var1: "one", "two" %} {%cycle var2: "one", "two" %}', assigns)
   end
 
   def test_size_of_array
-    assigns = {"array" => [1,2,3,4]}
+    assigns = { "array" => [1, 2, 3, 4] }
     assert_template_result('array has 4 elements', "array has {{ array.size }} elements", assigns)
   end
 
   def test_size_of_hash
-    assigns = {"hash" => {:a => 1, :b => 2, :c=> 3, :d => 4}}
+    assigns = { "hash" => { :a => 1, :b => 2, :c => 3, :d => 4 } }
     assert_template_result('hash has 4 elements', "hash has {{ hash.size }} elements", assigns)
   end
 
@@ -284,11 +283,11 @@ class StandardTagTest < Minitest::Test
   end
 
   def test_ifchanged
-    assigns = {'array' => [ 1, 1, 2, 2, 3, 3] }
-    assert_template_result('123','{%for item in array%}{%ifchanged%}{{item}}{% endifchanged %}{%endfor%}',assigns)
+    assigns = { 'array' => [ 1, 1, 2, 2, 3, 3] }
+    assert_template_result('123', '{%for item in array%}{%ifchanged%}{{item}}{% endifchanged %}{%endfor%}', assigns)
 
-    assigns = {'array' => [ 1, 1, 1, 1] }
-    assert_template_result('1','{%for item in array%}{%ifchanged%}{{item}}{% endifchanged %}{%endfor%}',assigns)
+    assigns = { 'array' => [ 1, 1, 1, 1] }
+    assert_template_result('1', '{%for item in array%}{%ifchanged%}{{item}}{% endifchanged %}{%endfor%}', assigns)
   end
 
   def test_multiline_tag

test/integration/tags/statements_test.rb

@@ -37,7 +37,6 @@ class StatementsTest < Minitest::Test
     text = ' {% if null <= 0 %} true {% else %} false {% endif %} '
     assert_template_result '  false  ', text
 
-
     text = ' {% if 0 <= null %} true {% else %} false {% endif %} '
     assert_template_result '  false  ', text
   end
@@ -72,18 +71,17 @@ class StatementsTest < Minitest::Test
     assert_template_result '  true  ', text, 'var' => 'hello there!'
   end
 
-
   def test_var_and_long_string_are_equal_backwards
     text = " {% if 'hello there!' == var %} true {% else %} false {% endif %} "
     assert_template_result '  true  ', text, 'var' => 'hello there!'
   end
 
-  #def test_is_nil
+  # def test_is_nil
   #  text = %| {% if var != nil %} true {% else %} false {% end %} |
   #  @template.assigns = { 'var' => 'hello there!'}
   #  expected = %|  true  |
   #  assert_equal expected, @template.parse(text)
-  #end
+  # end
 
   def test_is_collection_empty
     text = ' {% if array == empty %} true {% else %} false {% endif %} '
@@ -92,7 +90,7 @@ class StatementsTest < Minitest::Test
 
   def test_is_not_collection_empty
     text = ' {% if array == empty %} true {% else %} false {% endif %} '
-    assert_template_result '  false  ', text, 'array' => [1,2,3]
+    assert_template_result '  false  ', text, 'array' => [1, 2, 3]
   end
 
   def test_nil

test/integration/tags/table_row_test.rb

@@ -16,48 +16,45 @@ class TableRowTest < Minitest::Test
   end
 
   def test_table_row
-
     assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 4 </td><td class=\"col2\"> 5 </td><td class=\"col3\"> 6 </td></tr>\n",
-                           '{% tablerow n in numbers cols:3%} {{n}} {% endtablerow %}',
-                           'numbers' => [1,2,3,4,5,6])
+      '{% tablerow n in numbers cols:3%} {{n}} {% endtablerow %}',
+      'numbers' => [1, 2, 3, 4, 5, 6])
 
     assert_template_result("<tr class=\"row1\">\n</tr>\n",
-                           '{% tablerow n in numbers cols:3%} {{n}} {% endtablerow %}',
-                           'numbers' => [])
+      '{% tablerow n in numbers cols:3%} {{n}} {% endtablerow %}',
+      'numbers' => [])
   end
 
   def test_table_row_with_different_cols
     assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td><td class=\"col4\"> 4 </td><td class=\"col5\"> 5 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 6 </td></tr>\n",
-                           '{% tablerow n in numbers cols:5%} {{n}} {% endtablerow %}',
-                           'numbers' => [1,2,3,4,5,6])
-
+      '{% tablerow n in numbers cols:5%} {{n}} {% endtablerow %}',
+      'numbers' => [1, 2, 3, 4, 5, 6])
   end
 
   def test_table_col_counter
     assert_template_result("<tr class=\"row1\">\n<td class=\"col1\">1</td><td class=\"col2\">2</td></tr>\n<tr class=\"row2\"><td class=\"col1\">1</td><td class=\"col2\">2</td></tr>\n<tr class=\"row3\"><td class=\"col1\">1</td><td class=\"col2\">2</td></tr>\n",
-                           '{% tablerow n in numbers cols:2%}{{tablerowloop.col}}{% endtablerow %}',
-                           'numbers' => [1,2,3,4,5,6])
+      '{% tablerow n in numbers cols:2%}{{tablerowloop.col}}{% endtablerow %}',
+      'numbers' => [1, 2, 3, 4, 5, 6])
   end
 
   def test_quoted_fragment
     assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 4 </td><td class=\"col2\"> 5 </td><td class=\"col3\"> 6 </td></tr>\n",
-                           "{% tablerow n in collections.frontpage cols:3%} {{n}} {% endtablerow %}",
-                           'collections' => {'frontpage' => [1,2,3,4,5,6]})
+      "{% tablerow n in collections.frontpage cols:3%} {{n}} {% endtablerow %}",
+      'collections' => { 'frontpage' => [1, 2, 3, 4, 5, 6] })
     assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 4 </td><td class=\"col2\"> 5 </td><td class=\"col3\"> 6 </td></tr>\n",
-                           "{% tablerow n in collections['frontpage'] cols:3%} {{n}} {% endtablerow %}",
-                           'collections' => {'frontpage' => [1,2,3,4,5,6]})
-
+      "{% tablerow n in collections['frontpage'] cols:3%} {{n}} {% endtablerow %}",
+      'collections' => { 'frontpage' => [1, 2, 3, 4, 5, 6] })
   end
 
   def test_enumerable_drop
     assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 4 </td><td class=\"col2\"> 5 </td><td class=\"col3\"> 6 </td></tr>\n",
-                           '{% tablerow n in numbers cols:3%} {{n}} {% endtablerow %}',
-                           'numbers' => ArrayDrop.new([1,2,3,4,5,6]))
+      '{% tablerow n in numbers cols:3%} {{n}} {% endtablerow %}',
+      'numbers' => ArrayDrop.new([1, 2, 3, 4, 5, 6]))
   end
 
   def test_offset_and_limit
     assert_template_result("<tr class=\"row1\">\n<td class=\"col1\"> 1 </td><td class=\"col2\"> 2 </td><td class=\"col3\"> 3 </td></tr>\n<tr class=\"row2\"><td class=\"col1\"> 4 </td><td class=\"col2\"> 5 </td><td class=\"col3\"> 6 </td></tr>\n",
-                           '{% tablerow n in numbers cols:3 offset:1 limit:6%} {{n}} {% endtablerow %}',
-                           'numbers' => [0,1,2,3,4,5,6,7])
+      '{% tablerow n in numbers cols:3 offset:1 limit:6%} {{n}} {% endtablerow %}',
+      'numbers' => [0, 1, 2, 3, 4, 5, 6, 7])
   end
 end

test/integration/tags/unless_else_tag_test.rb

@@ -4,16 +4,16 @@ class UnlessElseTagTest < Minitest::Test
   include Liquid
 
   def test_unless
-    assert_template_result('  ',' {% unless true %} this text should not go into the output {% endunless %} ')
+    assert_template_result('  ', ' {% unless true %} this text should not go into the output {% endunless %} ')
     assert_template_result('  this text should go into the output  ',
-                           ' {% unless false %} this text should go into the output {% endunless %} ')
-    assert_template_result('  you rock ?','{% unless true %} you suck {% endunless %} {% unless false %} you rock {% endunless %}?')
+      ' {% unless false %} this text should go into the output {% endunless %} ')
+    assert_template_result('  you rock ?', '{% unless true %} you suck {% endunless %} {% unless false %} you rock {% endunless %}?')
   end
 
   def test_unless_else
-    assert_template_result(' YES ','{% unless true %} NO {% else %} YES {% endunless %}')
-    assert_template_result(' YES ','{% unless false %} YES {% else %} NO {% endunless %}')
-    assert_template_result(' YES ','{% unless "foo" %} NO {% else %} YES {% endunless %}')
+    assert_template_result(' YES ', '{% unless true %} NO {% else %} YES {% endunless %}')
+    assert_template_result(' YES ', '{% unless false %} YES {% else %} NO {% endunless %}')
+    assert_template_result(' YES ', '{% unless "foo" %} NO {% else %} YES {% endunless %}')
   end
 
   def test_unless_in_loop

test/integration/template_test.rb

@@ -1,4 +1,5 @@
 require 'test_helper'
+require 'timeout'
 
 class TemplateContextDrop < Liquid::Drop
   def before_method(method)
@@ -14,12 +15,10 @@ class TemplateContextDrop < Liquid::Drop
   end
 end
 
-class SomethingWithLength
+class SomethingWithLength < Liquid::Drop
   def length
     nil
   end
-
-  liquid_methods :length
 end
 
 class ErroneousDrop < Liquid::Drop
@@ -37,6 +36,16 @@ class TemplateTest < Minitest::Test
     assert_equal 'from instance assigns', t.parse("{{ foo }}").render!
   end
 
+  def test_warnings_is_not_exponential_time
+    str = "false"
+    100.times do
+      str = "{% if true %}true{% else %}#{str}{% endif %}"
+    end
+
+    t = Template.parse(str)
+    assert_equal [], Timeout.timeout(1) { t.warnings }
+  end
+
   def test_instance_assigns_persist_on_same_template_parsing_between_renders
     t = Template.new.parse("{{ foo }}{% assign foo = 'foo' %}{{ foo }}")
     assert_equal 'foo', t.render!
@@ -64,7 +73,7 @@ class TemplateTest < Minitest::Test
 
   def test_lambda_is_called_once_from_persistent_assigns_over_multiple_parses_and_renders
     t = Template.new
-    t.assigns['number'] = lambda { @global ||= 0; @global += 1 }
+    t.assigns['number'] = -> { @global ||= 0; @global += 1 }
     assert_equal '1', t.parse("{{number}}").render!
     assert_equal '1', t.parse("{{number}}").render!
     assert_equal '1', t.render!
@@ -73,7 +82,7 @@ class TemplateTest < Minitest::Test
 
   def test_lambda_is_called_once_from_custom_assigns_over_multiple_parses_and_renders
     t = Template.new
-    assigns = {'number' => lambda { @global ||= 0; @global += 1 }}
+    assigns = { 'number' => -> { @global ||= 0; @global += 1 } }
     assert_equal '1', t.parse("{{number}}").render!(assigns)
     assert_equal '1', t.parse("{{number}}").render!(assigns)
     assert_equal '1', t.render!(assigns)
@@ -82,57 +91,92 @@ class TemplateTest < Minitest::Test
 
   def test_resource_limits_works_with_custom_length_method
     t = Template.parse("{% assign foo = bar %}")
-    t.resource_limits = { :render_length_limit => 42 }
+    t.resource_limits.render_length_limit = 42
     assert_equal "", t.render!("bar" => SomethingWithLength.new)
   end
 
   def test_resource_limits_render_length
     t = Template.parse("0123456789")
-    t.resource_limits = { :render_length_limit => 5 }
-    assert_equal "Liquid error: Memory limits exceeded", t.render()
-    assert t.resource_limits[:reached]
-    t.resource_limits = { :render_length_limit => 10 }
-    assert_equal "0123456789", t.render!()
-    refute_nil t.resource_limits[:render_length_current]
+    t.resource_limits.render_length_limit = 5
+    assert_equal "Liquid error: Memory limits exceeded", t.render
+    assert t.resource_limits.reached?
+
+    t.resource_limits.render_length_limit = 10
+    assert_equal "0123456789", t.render!
+    refute_nil t.resource_limits.render_length
   end
 
   def test_resource_limits_render_score
     t = Template.parse("{% for a in (1..10) %} {% for a in (1..10) %} foo {% endfor %} {% endfor %}")
-    t.resource_limits = { :render_score_limit => 50 }
-    assert_equal "Liquid error: Memory limits exceeded", t.render()
-    assert t.resource_limits[:reached]
+    t.resource_limits.render_score_limit = 50
+    assert_equal "Liquid error: Memory limits exceeded", t.render
+    assert t.resource_limits.reached?
+
     t = Template.parse("{% for a in (1..100) %} foo {% endfor %}")
-    t.resource_limits = { :render_score_limit => 50 }
-    assert_equal "Liquid error: Memory limits exceeded", t.render()
-    assert t.resource_limits[:reached]
-    t.resource_limits = { :render_score_limit => 200 }
-    assert_equal (" foo " * 100), t.render!()
-    refute_nil t.resource_limits[:render_score_current]
+    t.resource_limits.render_score_limit = 50
+    assert_equal "Liquid error: Memory limits exceeded", t.render
+    assert t.resource_limits.reached?
+
+    t.resource_limits.render_score_limit = 200
+    assert_equal (" foo " * 100), t.render!
+    refute_nil t.resource_limits.render_score
   end
 
   def test_resource_limits_assign_score
     t = Template.parse("{% assign foo = 42 %}{% assign bar = 23 %}")
-    t.resource_limits = { :assign_score_limit => 1 }
-    assert_equal "Liquid error: Memory limits exceeded", t.render()
-    assert t.resource_limits[:reached]
-    t.resource_limits = { :assign_score_limit => 2 }
-    assert_equal "", t.render!()
-    refute_nil t.resource_limits[:assign_score_current]
+    t.resource_limits.assign_score_limit = 1
+    assert_equal "Liquid error: Memory limits exceeded", t.render
+    assert t.resource_limits.reached?
+
+    t.resource_limits.assign_score_limit = 2
+    assert_equal "", t.render!
+    refute_nil t.resource_limits.assign_score
   end
 
   def test_resource_limits_aborts_rendering_after_first_error
     t = Template.parse("{% for a in (1..100) %} foo1 {% endfor %} bar {% for a in (1..100) %} foo2 {% endfor %}")
-    t.resource_limits = { :render_score_limit => 50 }
-    assert_equal "Liquid error: Memory limits exceeded", t.render()
-    assert t.resource_limits[:reached]
+    t.resource_limits.render_score_limit = 50
+    assert_equal "Liquid error: Memory limits exceeded", t.render
+    assert t.resource_limits.reached?
   end
 
   def test_resource_limits_hash_in_template_gets_updated_even_if_no_limits_are_set
     t = Template.parse("{% for a in (1..100) %} {% assign foo = 1 %} {% endfor %}")
-    t.render!()
-    assert t.resource_limits[:assign_score_current] > 0
-    assert t.resource_limits[:render_score_current] > 0
-    assert t.resource_limits[:render_length_current] > 0
+    t.render!
+    assert t.resource_limits.assign_score > 0
+    assert t.resource_limits.render_score > 0
+    assert t.resource_limits.render_length > 0
+  end
+
+  def test_render_length_persists_between_blocks
+    t = Template.parse("{% if true %}aaaa{% endif %}")
+    t.resource_limits.render_length_limit = 7
+    assert_equal "Liquid error: Memory limits exceeded", t.render
+    t.resource_limits.render_length_limit = 8
+    assert_equal "aaaa", t.render
+
+    t = Template.parse("{% if true %}aaaa{% endif %}{% if true %}bbb{% endif %}")
+    t.resource_limits.render_length_limit = 13
+    assert_equal "Liquid error: Memory limits exceeded", t.render
+    t.resource_limits.render_length_limit = 14
+    assert_equal "aaaabbb", t.render
+
+    t = Template.parse("{% if true %}a{% endif %}{% if true %}b{% endif %}{% if true %}a{% endif %}{% if true %}b{% endif %}{% if true %}a{% endif %}{% if true %}b{% endif %}")
+    t.resource_limits.render_length_limit = 5
+    assert_equal "Liquid error: Memory limits exceeded", t.render
+    t.resource_limits.render_length_limit = 11
+    assert_equal "Liquid error: Memory limits exceeded", t.render
+    t.resource_limits.render_length_limit = 12
+    assert_equal "ababab", t.render
+  end
+
+  def test_default_resource_limits_unaffected_by_render_with_context
+    context = Context.new
+    t = Template.parse("{% for a in (1..100) %} {% assign foo = 1 %} {% endfor %}")
+    t.render!(context)
+    assert context.resource_limits.assign_score > 0
+    assert context.resource_limits.render_score > 0
+    assert context.resource_limits.render_length > 0
   end
 
   def test_can_use_drop_as_context
@@ -145,7 +189,7 @@ class TemplateTest < Minitest::Test
   end
 
   def test_render_bang_force_rethrow_errors_on_passed_context
-    context = Context.new({'drop' => ErroneousDrop.new})
+    context = Context.new({ 'drop' => ErroneousDrop.new })
     t = Template.new.parse('{{ drop.bad_method }}')
 
     e = assert_raises RuntimeError do
@@ -157,14 +201,16 @@ class TemplateTest < Minitest::Test
   def test_exception_handler_doesnt_reraise_if_it_returns_false
     exception = nil
     Template.parse("{{ 1 | divided_by: 0 }}").render({}, exception_handler: ->(e) { exception = e; false })
-    assert exception.is_a?(ZeroDivisionError)
+    assert exception.is_a?(Liquid::FilterError)
+    assert exception.original_exception.is_a?(ZeroDivisionError)
   end
 
   def test_exception_handler_does_reraise_if_it_returns_true
     exception = nil
-    assert_raises(ZeroDivisionError) do
+    assert_raises(Liquid::FilterError) do
       Template.parse("{{ 1 | divided_by: 0 }}").render({}, exception_handler: ->(e) { exception = e; true })
     end
-    assert exception.is_a?(ZeroDivisionError)
+    assert exception.is_a?(Liquid::FilterError)
+    assert exception.original_exception.is_a?(ZeroDivisionError)
   end
 end

test/integration/variable_test.rb

@@ -4,7 +4,7 @@ class VariableTest < Minitest::Test
   include Liquid
 
   def test_simple_variable
-    template = Template.parse(%|{{test}}|)
+    template = Template.parse(%({{test}}))
     assert_equal 'worked', template.render!('test' => 'worked')
     assert_equal 'worked wonderfully', template.render!('test' => 'worked wonderfully')
   end
@@ -14,43 +14,49 @@ class VariableTest < Minitest::Test
   end
 
   def test_simple_with_whitespaces
-    template = Template.parse(%|  {{ test }}  |)
+    template = Template.parse(%(  {{ test }}  ))
     assert_equal '  worked  ', template.render!('test' => 'worked')
     assert_equal '  worked wonderfully  ', template.render!('test' => 'worked wonderfully')
   end
 
   def test_ignore_unknown
-    template = Template.parse(%|{{ test }}|)
+    template = Template.parse(%({{ test }}))
     assert_equal '', template.render!
   end
 
   def test_hash_scoping
-    template = Template.parse(%|{{ test.test }}|)
-    assert_equal 'worked', template.render!('test' => {'test' => 'worked'})
+    template = Template.parse(%({{ test.test }}))
+    assert_equal 'worked', template.render!('test' => { 'test' => 'worked' })
   end
 
   def test_false_renders_as_false
     assert_equal 'false', Template.parse("{{ foo }}").render!('foo' => false)
+    assert_equal 'false', Template.parse("{{ false }}").render!
+  end
+
+  def test_nil_renders_as_empty_string
+    assert_equal '', Template.parse("{{ nil }}").render!
+    assert_equal 'cat', Template.parse("{{ nil | append: 'cat' }}").render!
   end
 
   def test_preset_assigns
-    template = Template.parse(%|{{ test }}|)
+    template = Template.parse(%({{ test }}))
     template.assigns['test'] = 'worked'
     assert_equal 'worked', template.render!
   end
 
   def test_reuse_parsed_template
-    template = Template.parse(%|{{ greeting }} {{ name }}|)
+    template = Template.parse(%({{ greeting }} {{ name }}))
     template.assigns['greeting'] = 'Goodbye'
     assert_equal 'Hello Tobi', template.render!('greeting' => 'Hello', 'name' => 'Tobi')
     assert_equal 'Hello ', template.render!('greeting' => 'Hello', 'unknown' => 'Tobi')
     assert_equal 'Hello Brian', template.render!('greeting' => 'Hello', 'name' => 'Brian')
     assert_equal 'Goodbye Brian', template.render!('name' => 'Brian')
-    assert_equal({'greeting'=>'Goodbye'}, template.assigns)
+    assert_equal({ 'greeting' => 'Goodbye' }, template.assigns)
   end
 
   def test_assigns_not_polluted_from_template
-    template = Template.parse(%|{{ test }}{% assign test = 'bar' %}{{ test }}|)
+    template = Template.parse(%({{ test }}{% assign test = 'bar' %}{{ test }}))
     template.assigns['test'] = 'baz'
     assert_equal 'bazbar', template.render!
     assert_equal 'bazbar', template.render!
@@ -59,8 +65,8 @@ class VariableTest < Minitest::Test
   end
 
   def test_hash_with_default_proc
-    template = Template.parse(%|Hello {{ test }}|)
-    assigns = Hash.new { |h,k| raise "Unknown variable '#{k}'" }
+    template = Template.parse(%(Hello {{ test }}))
+    assigns = Hash.new { |h, k| raise "Unknown variable '#{k}'" }
     assigns['test'] = 'Tobi'
     assert_equal 'Hello Tobi', template.render!(assigns)
     assigns.delete('test')

test/test_helper.rb

@@ -1,10 +1,12 @@
 #!/usr/bin/env ruby
 
+ENV["MT_NO_EXPECTATIONS"] = "1"
 require 'minitest/autorun'
 require 'spy/integration'
 
-$:.unshift(File.join(File.expand_path(File.dirname(__FILE__)), '..', 'lib'))
+$:.unshift(File.join(File.expand_path(__dir__), '..', 'lib'))
 require 'liquid.rb'
+require 'liquid/profiler'
 
 mode = :strict
 if env_mode = ENV['LIQUID_PARSER_MODE']
@@ -23,7 +25,7 @@ end
 module Minitest
   class Test
     def fixture(name)
-      File.join(File.expand_path(File.dirname(__FILE__)), "fixtures", name)
+      File.join(File.expand_path(__dir__), "fixtures", name)
     end
   end
 
@@ -48,13 +50,27 @@ module Minitest
     end
 
     def with_global_filter(*globals)
-      original_filters = Array.new(Liquid::Strainer.class_variable_get(:@@filters))
+      original_global_strainer = Liquid::Strainer.class_variable_get(:@@global_strainer)
+      Liquid::Strainer.class_variable_set(:@@global_strainer, Class.new(Liquid::Strainer) do
+        @filter_methods = Set.new
+      end)
+      Liquid::Strainer.class_variable_get(:@@strainer_class_cache).clear
+
       globals.each do |global|
         Liquid::Template.register_filter(global)
       end
       yield
     ensure
-      Liquid::Strainer.class_variable_set(:@@filters, original_filters)
+      Liquid::Strainer.class_variable_get(:@@strainer_class_cache).clear
+      Liquid::Strainer.class_variable_set(:@@global_strainer, original_global_strainer)
+    end
+
+    def with_taint_mode(mode)
+      old_mode = Liquid::Template.taint_mode
+      Liquid::Template.taint_mode = mode
+      yield
+    ensure
+      Liquid::Template.taint_mode = old_mode
     end
 
     def with_error_mode(mode)
@@ -72,3 +88,22 @@ class ThingWithToLiquid
     'foobar'
   end
 end
+
+class ErrorDrop < Liquid::Drop
+  def standard_error
+    raise Liquid::StandardError, 'standard error'
+  end
+
+  def argument_error
+    raise Liquid::ArgumentError, 'argument error'
+  end
+
+  def syntax_error
+    raise Liquid::SyntaxError, 'syntax error'
+  end
+
+  def exception
+    raise Exception, 'exception'
+  end
+end
+

test/unit/block_unit_test.rb

@@ -34,7 +34,7 @@ class BlockUnitTest < Minitest::Test
     template = Liquid::Template.parse("  {{funk}} {{so}} {{brother}} ")
     assert_equal 7, template.root.nodelist.size
     assert_equal [String, Variable, String, Variable, String, Variable, String],
-                 block_types(template.root.nodelist)
+      block_types(template.root.nodelist)
   end
 
   def test_with_block
@@ -45,11 +45,12 @@ class BlockUnitTest < Minitest::Test
 
   def test_with_custom_tag
     Liquid::Template.register_tag("testtag", Block)
-    assert Liquid::Template.parse( "{% testtag %} {% endtesttag %}")
+    assert Liquid::Template.parse("{% testtag %} {% endtesttag %}")
   end
 
   private
-    def block_types(nodelist)
-      nodelist.collect { |node| node.class }
-    end
+
+  def block_types(nodelist)
+    nodelist.collect(&:class)
+  end
 end # VariableTest

test/unit/condition_unit_test.rb

@@ -4,146 +4,147 @@ class ConditionUnitTest < Minitest::Test
   include Liquid
 
   def test_basic_condition
-    assert_equal false, Condition.new('1', '==', '2').evaluate
-    assert_equal true,  Condition.new('1', '==', '1').evaluate
+    assert_equal false, Condition.new(1, '==', 2).evaluate
+    assert_equal true,  Condition.new(1, '==', 1).evaluate
   end
 
   def test_default_operators_evalute_true
-    assert_evalutes_true '1', '==', '1'
-    assert_evalutes_true '1', '!=', '2'
-    assert_evalutes_true '1', '<>', '2'
-    assert_evalutes_true '1', '<', '2'
-    assert_evalutes_true '2', '>', '1'
-    assert_evalutes_true '1', '>=', '1'
-    assert_evalutes_true '2', '>=', '1'
-    assert_evalutes_true '1', '<=', '2'
-    assert_evalutes_true '1', '<=', '1'
+    assert_evalutes_true 1, '==', 1
+    assert_evalutes_true 1, '!=', 2
+    assert_evalutes_true 1, '<>', 2
+    assert_evalutes_true 1, '<', 2
+    assert_evalutes_true 2, '>', 1
+    assert_evalutes_true 1, '>=', 1
+    assert_evalutes_true 2, '>=', 1
+    assert_evalutes_true 1, '<=', 2
+    assert_evalutes_true 1, '<=', 1
     # negative numbers
-    assert_evalutes_true '1', '>', '-1'
-    assert_evalutes_true '-1', '<', '1'
-    assert_evalutes_true '1.0', '>', '-1.0'
-    assert_evalutes_true '-1.0', '<', '1.0'
+    assert_evalutes_true 1, '>', -1
+    assert_evalutes_true -1, '<', 1
+    assert_evalutes_true 1.0, '>', -1.0
+    assert_evalutes_true -1.0, '<', 1.0
   end
 
   def test_default_operators_evalute_false
-    assert_evalutes_false '1', '==', '2'
-    assert_evalutes_false '1', '!=', '1'
-    assert_evalutes_false '1', '<>', '1'
-    assert_evalutes_false '1', '<', '0'
-    assert_evalutes_false '2', '>', '4'
-    assert_evalutes_false '1', '>=', '3'
-    assert_evalutes_false '2', '>=', '4'
-    assert_evalutes_false '1', '<=', '0'
-    assert_evalutes_false '1', '<=', '0'
+    assert_evalutes_false 1, '==', 2
+    assert_evalutes_false 1, '!=', 1
+    assert_evalutes_false 1, '<>', 1
+    assert_evalutes_false 1, '<', 0
+    assert_evalutes_false 2, '>', 4
+    assert_evalutes_false 1, '>=', 3
+    assert_evalutes_false 2, '>=', 4
+    assert_evalutes_false 1, '<=', 0
+    assert_evalutes_false 1, '<=', 0
   end
 
   def test_contains_works_on_strings
-    assert_evalutes_true "'bob'", 'contains', "'o'"
-    assert_evalutes_true "'bob'", 'contains', "'b'"
-    assert_evalutes_true "'bob'", 'contains', "'bo'"
-    assert_evalutes_true "'bob'", 'contains', "'ob'"
-    assert_evalutes_true "'bob'", 'contains', "'bob'"
+    assert_evalutes_true 'bob', 'contains', 'o'
+    assert_evalutes_true 'bob', 'contains', 'b'
+    assert_evalutes_true 'bob', 'contains', 'bo'
+    assert_evalutes_true 'bob', 'contains', 'ob'
+    assert_evalutes_true 'bob', 'contains', 'bob'
 
-    assert_evalutes_false "'bob'", 'contains', "'bob2'"
-    assert_evalutes_false "'bob'", 'contains', "'a'"
-    assert_evalutes_false "'bob'", 'contains', "'---'"
+    assert_evalutes_false 'bob', 'contains', 'bob2'
+    assert_evalutes_false 'bob', 'contains', 'a'
+    assert_evalutes_false 'bob', 'contains', '---'
   end
 
   def test_invalid_comparation_operator
-    assert_evaluates_argument_error "1", '~~', '0'
+    assert_evaluates_argument_error 1, '~~', 0
   end
 
   def test_comparation_of_int_and_str
-    assert_evaluates_argument_error "'1'", '>', '0'
-    assert_evaluates_argument_error "'1'", '<', '0'
-    assert_evaluates_argument_error "'1'", '>=', '0'
-    assert_evaluates_argument_error "'1'", '<=', '0'
+    assert_evaluates_argument_error '1', '>', 0
+    assert_evaluates_argument_error '1', '<', 0
+    assert_evaluates_argument_error '1', '>=', 0
+    assert_evaluates_argument_error '1', '<=', 0
   end
 
   def test_contains_works_on_arrays
     @context = Liquid::Context.new
-    @context['array'] = [1,2,3,4,5]
+    @context['array'] = [1, 2, 3, 4, 5]
+    array_expr = VariableLookup.new("array")
 
-    assert_evalutes_false "array",  'contains', '0'
-    assert_evalutes_true "array",   'contains', '1'
-    assert_evalutes_true "array",   'contains', '2'
-    assert_evalutes_true "array",   'contains', '3'
-    assert_evalutes_true "array",   'contains', '4'
-    assert_evalutes_true "array",   'contains', '5'
-    assert_evalutes_false "array",  'contains', '6'
-    assert_evalutes_false "array",  'contains', '"1"'
+    assert_evalutes_false array_expr, 'contains', 0
+    assert_evalutes_true array_expr, 'contains', 1
+    assert_evalutes_true array_expr, 'contains', 2
+    assert_evalutes_true array_expr, 'contains', 3
+    assert_evalutes_true array_expr, 'contains', 4
+    assert_evalutes_true array_expr, 'contains', 5
+    assert_evalutes_false array_expr, 'contains', 6
+    assert_evalutes_false array_expr, 'contains', "1"
   end
 
   def test_contains_returns_false_for_nil_operands
     @context = Liquid::Context.new
-    assert_evalutes_false "not_assigned", 'contains', '0'
-    assert_evalutes_false "0", 'contains', 'not_assigned'
+    assert_evalutes_false VariableLookup.new('not_assigned'), 'contains', '0'
+    assert_evalutes_false 0, 'contains', VariableLookup.new('not_assigned')
   end
 
   def test_contains_return_false_on_wrong_data_type
-    assert_evalutes_false "1", 'contains', '0'
+    assert_evalutes_false 1, 'contains', 0
   end
 
   def test_or_condition
-    condition = Condition.new('1', '==', '2')
+    condition = Condition.new(1, '==', 2)
 
     assert_equal false, condition.evaluate
 
-    condition.or Condition.new('2', '==', '1')
+    condition.or Condition.new(2, '==', 1)
 
     assert_equal false, condition.evaluate
 
-    condition.or Condition.new('1', '==', '1')
+    condition.or Condition.new(1, '==', 1)
 
     assert_equal true, condition.evaluate
   end
 
   def test_and_condition
-    condition = Condition.new('1', '==', '1')
+    condition = Condition.new(1, '==', 1)
 
     assert_equal true, condition.evaluate
 
-    condition.and Condition.new('2', '==', '2')
+    condition.and Condition.new(2, '==', 2)
 
     assert_equal true, condition.evaluate
 
-    condition.and Condition.new('2', '==', '1')
+    condition.and Condition.new(2, '==', 1)
 
     assert_equal false, condition.evaluate
   end
 
   def test_should_allow_custom_proc_operator
-    Condition.operators['starts_with'] = Proc.new { |cond, left, right| left =~ %r{^#{right}} }
+    Condition.operators['starts_with'] = proc { |cond, left, right| left =~ %r{^#{right}} }
 
-    assert_evalutes_true "'bob'",   'starts_with', "'b'"
-    assert_evalutes_false "'bob'",  'starts_with', "'o'"
-
-    ensure
-      Condition.operators.delete 'starts_with'
+    assert_evalutes_true 'bob', 'starts_with', 'b'
+    assert_evalutes_false 'bob', 'starts_with', 'o'
+  ensure
+    Condition.operators.delete 'starts_with'
   end
 
   def test_left_or_right_may_contain_operators
     @context = Liquid::Context.new
     @context['one'] = @context['another'] = "gnomeslab-and-or-liquid"
 
-    assert_evalutes_true "one", '==', "another"
+    assert_evalutes_true VariableLookup.new("one"), '==', VariableLookup.new("another")
   end
 
   private
-    def assert_evalutes_true(left, op, right)
-      assert Condition.new(left, op, right).evaluate(@context || Liquid::Context.new),
-             "Evaluated false: #{left} #{op} #{right}"
-    end
 
-    def assert_evalutes_false(left, op, right)
-      assert !Condition.new(left, op, right).evaluate(@context || Liquid::Context.new),
-             "Evaluated true: #{left} #{op} #{right}"
-    end
+  def assert_evalutes_true(left, op, right)
+    assert Condition.new(left, op, right).evaluate(@context || Liquid::Context.new),
+      "Evaluated false: #{left} #{op} #{right}"
+  end
 
-    def assert_evaluates_argument_error(left, op, right)
-      assert_raises(Liquid::ArgumentError) do
-        Condition.new(left, op, right).evaluate(@context || Liquid::Context.new)
-      end
+  def assert_evalutes_false(left, op, right)
+    assert !Condition.new(left, op, right).evaluate(@context || Liquid::Context.new),
+      "Evaluated true: #{left} #{op} #{right}"
+  end
+
+  def assert_evaluates_argument_error(left, op, right)
+    assert_raises(Liquid::ArgumentError) do
+      Condition.new(left, op, right).evaluate(@context || Liquid::Context.new)
     end
+  end
 
 end # ConditionTest

test/unit/context_unit_test.rb

@@ -122,30 +122,25 @@ class ContextUnitTest < Minitest::Test
   end
 
   def test_length_query
-
-    @context['numbers'] = [1,2,3,4]
+    @context['numbers'] = [1, 2, 3, 4]
 
     assert_equal 4, @context['numbers.size']
 
-    @context['numbers'] = {1 => 1,2 => 2,3 => 3,4 => 4}
+    @context['numbers'] = { 1 => 1, 2 => 2, 3 => 3, 4 => 4 }
 
     assert_equal 4, @context['numbers.size']
 
-    @context['numbers'] = {1 => 1,2 => 2,3 => 3,4 => 4, 'size' => 1000}
+    @context['numbers'] = { 1 => 1, 2 => 2, 3 => 3, 4 => 4, 'size' => 1000 }
 
     assert_equal 1000, @context['numbers.size']
-
   end
 
   def test_hyphenated_variable
-
     @context['oh-my'] = 'godz'
     assert_equal 'godz', @context['oh-my']
-
   end
 
   def test_add_filter
-
     filter = Module.new do
       def hi(output)
         output + ' hi!'
@@ -161,11 +156,9 @@ class ContextUnitTest < Minitest::Test
 
     context.add_filters(filter)
     assert_equal 'hi? hi!', context.invoke(:hi, 'hi?')
-
   end
 
   def test_only_intended_filters_make_it_there
-
     filter = Module.new do
       def hi(output)
         output + ' hi!'
@@ -196,7 +189,7 @@ class ContextUnitTest < Minitest::Test
   end
 
   def test_hierachical_data
-    @context['hash'] = {"name" => 'tobi'}
+    @context['hash'] = { "name" => 'tobi' }
     assert_equal 'tobi', @context['hash.name']
     assert_equal 'tobi', @context['hash["name"]']
   end
@@ -225,7 +218,7 @@ class ContextUnitTest < Minitest::Test
   end
 
   def test_array_notation
-    @context['test'] = [1,2,3,4,5]
+    @context['test'] = [1, 2, 3, 4, 5]
 
     assert_equal 1, @context['test[0]']
     assert_equal 2, @context['test[1]']
@@ -235,21 +228,21 @@ class ContextUnitTest < Minitest::Test
   end
 
   def test_recoursive_array_notation
-    @context['test'] = {'test' => [1,2,3,4,5]}
+    @context['test'] = { 'test' => [1, 2, 3, 4, 5] }
 
     assert_equal 1, @context['test.test[0]']
 
-    @context['test'] = [{'test' => 'worked'}]
+    @context['test'] = [{ 'test' => 'worked' }]
 
     assert_equal 'worked', @context['test[0].test']
   end
 
   def test_hash_to_array_transition
     @context['colors'] = {
-      'Blue'    => ['003366','336699', '6699CC', '99CCFF'],
-      'Green'   => ['003300','336633', '669966', '99CC99'],
-      'Yellow'  => ['CC9900','FFCC00', 'FFFF99', 'FFFFCC'],
-      'Red'     => ['660000','993333', 'CC6666', 'FF9999']
+      'Blue'    => ['003366', '336699', '6699CC', '99CCFF'],
+      'Green'   => ['003300', '336633', '669966', '99CC99'],
+      'Yellow'  => ['CC9900', 'FFCC00', 'FFFF99', 'FFFFCC'],
+      'Red'     => ['660000', '993333', 'CC6666', 'FF9999']
     }
 
     assert_equal '003366', @context['colors.Blue[0]']
@@ -257,12 +250,12 @@ class ContextUnitTest < Minitest::Test
   end
 
   def test_try_first
-    @context['test'] = [1,2,3,4,5]
+    @context['test'] = [1, 2, 3, 4, 5]
 
     assert_equal 1, @context['test.first']
     assert_equal 5, @context['test.last']
 
-    @context['test'] = {'test' => [1,2,3,4,5]}
+    @context['test'] = { 'test' => [1, 2, 3, 4, 5] }
 
     assert_equal 1, @context['test.test.first']
     assert_equal 5, @context['test.test.last']
@@ -273,8 +266,8 @@ class ContextUnitTest < Minitest::Test
   end
 
   def test_access_hashes_with_hash_notation
-    @context['products'] = {'count' => 5, 'tags' => ['deepsnow', 'freestyle'] }
-    @context['product'] = {'variants' => [ {'title' => 'draft151cm'}, {'title' => 'element151cm'}  ]}
+    @context['products'] = { 'count' => 5, 'tags' => ['deepsnow', 'freestyle'] }
+    @context['product'] = { 'variants' => [ { 'title' => 'draft151cm' }, { 'title' => 'element151cm' }  ] }
 
     assert_equal 5, @context['products["count"]']
     assert_equal 'deepsnow', @context['products["tags"][0]']
@@ -294,18 +287,17 @@ class ContextUnitTest < Minitest::Test
   end
 
   def test_access_hashes_with_hash_access_variables
-
     @context['var'] = 'tags'
-    @context['nested'] = {'var' => 'tags'}
-    @context['products'] = {'count' => 5, 'tags' => ['deepsnow', 'freestyle'] }
+    @context['nested'] = { 'var' => 'tags' }
+    @context['products'] = { 'count' => 5, 'tags' => ['deepsnow', 'freestyle'] }
 
     assert_equal 'deepsnow', @context['products[var].first']
     assert_equal 'freestyle', @context['products[nested.var].last']
   end
 
   def test_hash_notation_only_for_hash_access
-    @context['array'] = [1,2,3,4,5]
-    @context['hash'] = {'first' => 'Hello'}
+    @context['array'] = [1, 2, 3, 4, 5]
+    @context['hash'] = { 'first' => 'Hello' }
 
     assert_equal 1, @context['array.first']
     assert_equal nil, @context['array["first"]']
@@ -313,66 +305,64 @@ class ContextUnitTest < Minitest::Test
   end
 
   def test_first_can_appear_in_middle_of_callchain
-
-    @context['product'] = {'variants' => [ {'title' => 'draft151cm'}, {'title' => 'element151cm'}  ]}
+    @context['product'] = { 'variants' => [ { 'title' => 'draft151cm' }, { 'title' => 'element151cm' }  ] }
 
     assert_equal 'draft151cm', @context['product.variants[0].title']
     assert_equal 'element151cm', @context['product.variants[1].title']
     assert_equal 'draft151cm', @context['product.variants.first.title']
     assert_equal 'element151cm', @context['product.variants.last.title']
-
   end
 
   def test_cents
-    @context.merge( "cents" => HundredCentes.new )
+    @context.merge("cents" => HundredCentes.new)
     assert_equal 100, @context['cents']
   end
 
   def test_nested_cents
-    @context.merge( "cents" => { 'amount' => HundredCentes.new} )
+    @context.merge("cents" => { 'amount' => HundredCentes.new })
     assert_equal 100, @context['cents.amount']
 
-    @context.merge( "cents" => { 'cents' => { 'amount' => HundredCentes.new} } )
+    @context.merge("cents" => { 'cents' => { 'amount' => HundredCentes.new } })
     assert_equal 100, @context['cents.cents.amount']
   end
 
   def test_cents_through_drop
-    @context.merge( "cents" => CentsDrop.new )
+    @context.merge("cents" => CentsDrop.new)
     assert_equal 100, @context['cents.amount']
   end
 
   def test_nested_cents_through_drop
-    @context.merge( "vars" => {"cents" => CentsDrop.new} )
+    @context.merge("vars" => { "cents" => CentsDrop.new })
     assert_equal 100, @context['vars.cents.amount']
   end
 
   def test_drop_methods_with_question_marks
-    @context.merge( "cents" => CentsDrop.new )
+    @context.merge("cents" => CentsDrop.new)
     assert @context['cents.non_zero?']
   end
 
   def test_context_from_within_drop
-    @context.merge( "test" => '123', "vars" => ContextSensitiveDrop.new )
+    @context.merge("test" => '123', "vars" => ContextSensitiveDrop.new)
     assert_equal '123', @context['vars.test']
   end
 
   def test_nested_context_from_within_drop
-    @context.merge( "test" => '123', "vars" => {"local" => ContextSensitiveDrop.new }  )
+    @context.merge("test" => '123', "vars" => { "local" => ContextSensitiveDrop.new })
     assert_equal '123', @context['vars.local.test']
   end
 
   def test_ranges
-    @context.merge( "test" => '5' )
+    @context.merge("test" => '5')
     assert_equal (1..5), @context['(1..5)']
     assert_equal (1..5), @context['(1..test)']
     assert_equal (5..5), @context['(test..test)']
   end
 
   def test_cents_through_drop_nestedly
-    @context.merge( "cents" => {"cents" => CentsDrop.new} )
+    @context.merge("cents" => { "cents" => CentsDrop.new })
     assert_equal 100, @context['cents.cents.amount']
 
-    @context.merge( "cents" => { "cents" => {"cents" => CentsDrop.new}} )
+    @context.merge("cents" => { "cents" => { "cents" => CentsDrop.new } })
     assert_equal 100, @context['cents.cents.cents.amount']
   end
 
@@ -393,7 +383,7 @@ class ContextUnitTest < Minitest::Test
   end
 
   def test_proc_as_variable
-    @context['dynamic'] = Proc.new { 'Hello' }
+    @context['dynamic'] = proc { 'Hello' }
 
     assert_equal 'Hello', @context['dynamic']
   end
@@ -411,7 +401,7 @@ class ContextUnitTest < Minitest::Test
   end
 
   def test_array_containing_lambda_as_variable
-    @context['dynamic'] = [1,2, proc { 'Hello' } ,4,5]
+    @context['dynamic'] = [1, 2, proc { 'Hello' }, 4, 5]
 
     assert_equal 'Hello', @context['dynamic[2]']
   end
@@ -437,7 +427,7 @@ class ContextUnitTest < Minitest::Test
   end
 
   def test_lambda_in_array_is_called_once
-    @context['callcount'] = [1,2, proc { @global ||= 0; @global += 1; @global.to_s } ,4,5]
+    @context['callcount'] = [1, 2, proc { @global ||= 0; @global += 1; @global.to_s }, 4, 5]
 
     assert_equal '1', @context['callcount[2]']
     assert_equal '1', @context['callcount[2]']
@@ -469,24 +459,13 @@ class ContextUnitTest < Minitest::Test
 
     refute mock_any.has_been_called?
     assert mock_empty.has_been_called?
-  end 
-
-  def test_variable_lookup_caches_markup
-    mock_scan = Spy.on_instance_method(String, :scan).and_return(["string"])
-
-    @context['string'] = 'string'
-    @context['string']
-    @context['string']
-
-    assert_equal 1, mock_scan.calls.size
   end
 
   def test_context_initialization_with_a_proc_in_environment
-    contx = Context.new([:test => lambda { |c| c['poutine']}], {:test => :foo})
+    contx = Context.new([:test => ->(c) { c['poutine'] }], { :test => :foo })
 
     assert contx
     assert_nil contx['poutine']
   end
 
-
 end # ContextTest

test/unit/file_system_unit_test.rb

@@ -5,13 +5,13 @@ class FileSystemUnitTest < Minitest::Test
 
   def test_default
     assert_raises(FileSystemError) do
-      BlankFileSystem.new.read_template_file("dummy", {'dummy'=>'smarty'})
+      BlankFileSystem.new.read_template_file("dummy")
     end
   end
 
   def test_local
     file_system = Liquid::LocalFileSystem.new("/some/path")
-    assert_equal "/some/path/_mypartial.liquid"    , file_system.full_path("mypartial")
+    assert_equal "/some/path/_mypartial.liquid", file_system.full_path("mypartial")
     assert_equal "/some/path/dir/_mypartial.liquid", file_system.full_path("dir/mypartial")
 
     assert_raises(FileSystemError) do
@@ -29,7 +29,7 @@ class FileSystemUnitTest < Minitest::Test
 
   def test_custom_template_filename_patterns
     file_system = Liquid::LocalFileSystem.new("/some/path", "%s.html")
-    assert_equal "/some/path/mypartial.html"    , file_system.full_path("mypartial")
+    assert_equal "/some/path/mypartial.html", file_system.full_path("mypartial")
     assert_equal "/some/path/dir/mypartial.html", file_system.full_path("dir/mypartial")
   end
 end # FileSystemTest

test/unit/i18n_unit_test.rb

@@ -24,7 +24,7 @@ class I18nUnitTest < Minitest::Test
   #     @i18n.translate("whatever", :oopstypos => "yes")
   #   end
   # end
-  
+
   def test_raises_unknown_translation
     assert_raises I18n::TranslationError do
       @i18n.translate("doesnt_exist")

test/unit/lexer_unit_test.rb

@@ -4,23 +4,23 @@ class LexerUnitTest < Minitest::Test
   include Liquid
 
   def test_strings
-    tokens = Lexer.new(%! 'this is a test""' "wat 'lol'"!).tokenize
-    assert_equal [[:string,%!'this is a test""'!], [:string, %!"wat 'lol'"!], [:end_of_string]], tokens
+    tokens = Lexer.new(%( 'this is a test""' "wat 'lol'")).tokenize
+    assert_equal [[:string, %('this is a test""')], [:string, %("wat 'lol'")], [:end_of_string]], tokens
   end
 
   def test_integer
     tokens = Lexer.new('hi 50').tokenize
-    assert_equal [[:id,'hi'], [:number, '50'], [:end_of_string]], tokens
+    assert_equal [[:id, 'hi'], [:number, '50'], [:end_of_string]], tokens
   end
 
   def test_float
     tokens = Lexer.new('hi 5.0').tokenize
-    assert_equal [[:id,'hi'], [:number, '5.0'], [:end_of_string]], tokens
+    assert_equal [[:id, 'hi'], [:number, '5.0'], [:end_of_string]], tokens
   end
 
   def test_comparison
     tokens = Lexer.new('== <> contains').tokenize
-    assert_equal [[:comparison,'=='], [:comparison, '<>'], [:comparison, 'contains'], [:end_of_string]], tokens
+    assert_equal [[:comparison, '=='], [:comparison, '<>'], [:comparison, 'contains'], [:end_of_string]], tokens
   end
 
   def test_specials
@@ -31,13 +31,16 @@ class LexerUnitTest < Minitest::Test
   end
 
   def test_fancy_identifiers
-    tokens = Lexer.new('hi! five?').tokenize
-    assert_equal [[:id,'hi!'], [:id, 'five?'], [:end_of_string]], tokens
+    tokens = Lexer.new('hi five?').tokenize
+    assert_equal [[:id, 'hi'], [:id, 'five?'], [:end_of_string]], tokens
+
+    tokens = Lexer.new('2foo').tokenize
+    assert_equal [[:number, '2'], [:id, 'foo'], [:end_of_string]], tokens
   end
 
   def test_whitespace
     tokens = Lexer.new("five|\n\t ==").tokenize
-    assert_equal [[:id,'five'], [:pipe, '|'], [:comparison, '=='], [:end_of_string]], tokens
+    assert_equal [[:id, 'five'], [:pipe, '|'], [:comparison, '=='], [:end_of_string]], tokens
   end
 
   def test_unexpected_character

test/unit/module_ex_unit_test.rb

@@ -1,87 +0,0 @@
-require 'test_helper'
-
-class TestClassA
-  liquid_methods :allowedA, :chainedB
-  def allowedA
-    'allowedA'
-  end
-  def restrictedA
-    'restrictedA'
-  end
-  def chainedB
-    TestClassB.new
-  end
-end
-
-class TestClassB
-  liquid_methods :allowedB, :chainedC
-  def allowedB
-    'allowedB'
-  end
-  def chainedC
-    TestClassC.new
-  end
-end
-
-class TestClassC
-  liquid_methods :allowedC
-  def allowedC
-    'allowedC'
-  end
-end
-
-class TestClassC::LiquidDropClass
-  def another_allowedC
-    'another_allowedC'
-  end
-end
-
-class ModuleExUnitTest < Minitest::Test
-  include Liquid
-
-  def setup
-    @a = TestClassA.new
-    @b = TestClassB.new
-    @c = TestClassC.new
-  end
-
-  def test_should_create_LiquidDropClass
-    assert TestClassA::LiquidDropClass
-    assert TestClassB::LiquidDropClass
-    assert TestClassC::LiquidDropClass
-  end
-
-  def test_should_respond_to_liquid
-    assert @a.respond_to?(:to_liquid)
-    assert @b.respond_to?(:to_liquid)
-    assert @c.respond_to?(:to_liquid)
-  end
-
-  def test_should_return_LiquidDropClass_object
-    assert @a.to_liquid.is_a?(TestClassA::LiquidDropClass)
-    assert @b.to_liquid.is_a?(TestClassB::LiquidDropClass)
-    assert @c.to_liquid.is_a?(TestClassC::LiquidDropClass)
-  end
-
-  def test_should_respond_to_liquid_methods
-    assert @a.to_liquid.respond_to?(:allowedA)
-    assert @a.to_liquid.respond_to?(:chainedB)
-    assert @b.to_liquid.respond_to?(:allowedB)
-    assert @b.to_liquid.respond_to?(:chainedC)
-    assert @c.to_liquid.respond_to?(:allowedC)
-    assert @c.to_liquid.respond_to?(:another_allowedC)
-  end
-
-  def test_should_not_respond_to_restricted_methods
-    assert ! @a.to_liquid.respond_to?(:restricted)
-  end
-
-  def test_should_use_regular_objects_as_drops
-    assert_template_result 'allowedA', "{{ a.allowedA }}", 'a'=>@a
-    assert_template_result 'allowedB', "{{ a.chainedB.allowedB }}", 'a'=>@a
-    assert_template_result 'allowedC', "{{ a.chainedB.chainedC.allowedC }}", 'a'=>@a
-    assert_template_result 'another_allowedC', "{{ a.chainedB.chainedC.another_allowedC }}", 'a'=>@a
-    assert_template_result '', "{{ a.restricted }}", 'a'=>@a
-    assert_template_result '', "{{ a.unknown }}", 'a'=>@a
-  end
-end # ModuleExTest

test/unit/parser_unit_test.rb

@@ -44,9 +44,9 @@ class ParserUnitTest < Minitest::Test
   end
 
   def test_expressions
-    p = Parser.new("hi.there hi[5].! hi.there.bob")
+    p = Parser.new("hi.there hi?[5].there? hi.there.bob")
     assert_equal 'hi.there', p.expression
-    assert_equal 'hi[5].!', p.expression
+    assert_equal 'hi?[5].there?', p.expression
     assert_equal 'hi.there.bob', p.expression
 
     p = Parser.new("567 6.0 'lol' \"wut\"")