Add performance rubocop and fixes

.gitignore

@@ -4,6 +4,7 @@
 pkg
 *.rbc
 .rvmrc
+.idea
 .ruby-version
 Gemfile.lock
 .bundle

.rubocop.shopify.yml

@@ -892,7 +892,7 @@ Lint/FormatParameterMismatch:
   Enabled: true
 
 Lint/HandleExceptions:
-  AllowComments: true
+  Enabled: true
 
 Lint/ImplicitStringConcatenation:
   Description: Checks for adjacent string literals on the same line, which could

.rubocop.yml

@@ -1,17 +1,10 @@
 inherit_from:
-  - 'https://shopify.github.io/ruby-style-guide/rubocop.yml'
-  - .rubocop_todo.yml
+  - .rubocop.shopify.yml
 
 require: rubocop-performance
 
 Performance:
   Enabled: true
 
-AllCops:
-  TargetRubyVersion: 2.4
-  Exclude:
-    - 'vendor/bundle/**/*'
-
-Naming/MethodName:
-  Exclude:
-    - 'example/server/liquid_servlet.rb'
+Metrics/LineLength:
+  Enabled: false

.rubocop_todo.yml

@@ -1,48 +0,0 @@
-# This configuration was generated by
-# `rubocop --auto-gen-config`
-# on 2019-09-11 06:34:25 +1000 using RuboCop version 0.74.0.
-# 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
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: runtime_error, standard_error
-Lint/InheritException:
-  Exclude:
-    - 'lib/liquid/interrupts.rb'
-
-# Offense count: 98
-# Cop supports --auto-correct.
-# Configuration parameters: AutoCorrect, AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
-# URISchemes: http, https
-Metrics/LineLength:
-  Max: 294
-
-# Offense count: 44
-Naming/ConstantName:
-  Exclude:
-    - 'lib/liquid.rb'
-    - 'lib/liquid/block_body.rb'
-    - 'lib/liquid/tags/assign.rb'
-    - 'lib/liquid/tags/capture.rb'
-    - 'lib/liquid/tags/case.rb'
-    - 'lib/liquid/tags/cycle.rb'
-    - 'lib/liquid/tags/for.rb'
-    - 'lib/liquid/tags/if.rb'
-    - 'lib/liquid/tags/include.rb'
-    - 'lib/liquid/tags/raw.rb'
-    - 'lib/liquid/tags/table_row.rb'
-    - 'lib/liquid/variable.rb'
-    - 'performance/shopify/comment_form.rb'
-    - 'performance/shopify/paginate.rb'
-    - 'test/integration/tags/include_tag_test.rb'
-
-# Offense count: 5
-Style/ClassVars:
-  Exclude:
-    - 'lib/liquid/condition.rb'
-    - 'lib/liquid/strainer.rb'
-    - 'lib/liquid/template.rb'

.travis.yml

@@ -1,26 +1,30 @@
 language: ruby
-cache: bundler
 
 rvm:
   - 2.4
   - 2.5
-  - &latest_ruby 2.6
+  - 2.6
   - 2.7
   - ruby-head
+  - jruby-head
+  - truffleruby
+
+sudo: false
+
+addons:
+  apt:
+    packages:
+    - libgmp3-dev
 
 matrix:
-  include:
-    - rvm: *latest_ruby
-      script: bundle exec rake memory_profile:run
-      name: Profiling Memory Usage
   allow_failures:
     - rvm: ruby-head
+    - rvm: jruby-head
 
-branches:
-  only:
-    - master
-    - gh-pages
-    - /.*-stable/
+install:
+  - bundle install
+
+script: bundle exec rake
 
 notifications:
   disable: true

Gemfile

@@ -10,7 +10,6 @@ gemspec
 group :benchmark, :test do
   gem 'benchmark-ips'
   gem 'memory_profiler'
-  gem 'terminal-table'
 
   install_if -> { RUBY_PLATFORM !~ /mingw|mswin|java/ && RUBY_ENGINE != 'truffleruby' } do
     gem 'stackprof'
@@ -22,6 +21,6 @@ group :test do
   gem 'rubocop-performance', require: false
 
   platform :mri, :truffleruby do
-    gem 'liquid-c', github: 'Shopify/liquid-c', ref: 'master'
+    gem 'liquid-c', github: 'Shopify/liquid-c', ref: '7ba926791ef8411984d0f3e41c6353fd716041c6'
   end
 end

History.md

@@ -274,7 +274,7 @@ Yanked from rubygems, as it contained too many changes that broke compatibility.
 * Fixed bad error reporting when a filter called a method which doesn't exist. Liquid told you that it couldn't find the filter which was obviously misleading [Tobias Luetke]
 * Removed count helper from standard lib. use size [Tobias Luetke]
 * Fixed bug with string filter parameters failing to tolerate commas in strings. [Paul Hammond]
-* Improved filter parameters. Filter parameters are now context sensitive; Types are resolved according to the rules of the context. Multiple parameters are now separated by the Liquid::ArgumentSeparator: , by default [Paul Hammond]
+* Improved filter parameters. Filter parameters are now context sensitive; Types are resolved according to the rules of the context. Multiple parameters are now separated by the Liquid::ARGUMENT_SEPARATOR: , by default [Paul Hammond]
     {{ 'Typo' | link_to: 'http://typo.leetsoft.com', 'Typo - a modern weblog engine' }}
 * Added Liquid::Drop. A base class which you can use for exporting proxy objects to liquid which can acquire more data when used in liquid. [Tobias Luetke]
 

README.md

@@ -106,9 +106,3 @@ template = Liquid::Template.parse("{{x}} {{y}}")
 template.render!({ 'x' => 1}, { strict_variables: true })
 #=> Liquid::UndefinedVariable: Liquid error: undefined variable y
 ```
-
-### Usage tracking
-
-To help track usages of a feature or code path in production, we have released opt-in usage tracking. To enable this, we provide an empty `Liquid:: Usage.increment` method which you can customize to your needs. The feature is well suited to https://github.com/Shopify/statsd-instrument. However, the choice of implementation is up to you.
-
-Once you have enabled usage tracking, we recommend reporting any events through Github Issues that your system may be logging. It is highly likely this event has been added to consider deprecating or improving code specific to this event, so please raise any concerns.

Rakefile

@@ -2,16 +2,16 @@
 
 require 'rake'
 require 'rake/testtask'
-$LOAD_PATH.unshift(File.expand_path("../lib", __FILE__))
-require "liquid/version"
+$LOAD_PATH.unshift(File.expand_path('lib', __dir__))
+require 'liquid/version'
 
-task(default: [:test, :rubocop])
+task(default: %i[test rubocop])
 
 desc('run test suite with default parser')
 Rake::TestTask.new(:base_test) do |t|
   t.libs << '.' << 'lib' << 'test'
   t.test_files = FileList['test/{integration,unit}/**/*_test.rb']
-  t.verbose    = false
+  t.verbose = false
 end
 
 desc('run test suite with warn error mode')
@@ -37,6 +37,7 @@ task :test do
   Rake::Task['base_test'].invoke
 
   if RUBY_ENGINE == 'ruby' || RUBY_ENGINE == 'truffleruby'
+
     ENV['LIQUID_C'] = '1'
 
     ENV['LIQUID_PARSER_MODE'] = 'lax'
@@ -51,7 +52,7 @@ end
 
 task(gem: :build)
 task :build do
-  system "gem build liquid.gemspec"
+  system 'gem build liquid.gemspec'
 end
 
 task install: :build do
@@ -60,45 +61,45 @@ end
 
 task release: :build do
   system "git tag -a v#{Liquid::VERSION} -m 'Tagging #{Liquid::VERSION}'"
-  system "git push --tags"
+  system 'git push --tags'
   system "gem push liquid-#{Liquid::VERSION}.gem"
   system "rm liquid-#{Liquid::VERSION}.gem"
 end
 
 namespace :benchmark do
-  desc "Run the liquid benchmark with lax parsing"
+  desc 'Run the liquid benchmark with lax parsing'
   task :run do
-    ruby "./performance/benchmark.rb lax"
+    ruby './performance/benchmark.rb lax'
   end
 
-  desc "Run the liquid benchmark with strict parsing"
+  desc 'Run the liquid benchmark with strict parsing'
   task :strict do
-    ruby "./performance/benchmark.rb strict"
+    ruby './performance/benchmark.rb strict'
   end
 end
 
 namespace :profile do
-  desc "Run the liquid profile/performance coverage"
+  desc 'Run the liquid profile/performance coverage'
   task :run do
-    ruby "./performance/profile.rb"
+    ruby './performance/profile.rb'
   end
 
-  desc "Run the liquid profile/performance coverage with strict parsing"
+  desc 'Run the liquid profile/performance coverage with strict parsing'
   task :strict do
-    ruby "./performance/profile.rb strict"
+    ruby './performance/profile.rb strict'
   end
 end
 
 namespace :memory_profile do
-  desc "Run memory profiler"
+  desc 'Run memory profiler'
   task :run do
-    ruby "./performance/memory_profile.rb"
+    ruby './performance/memory_profile.rb'
   end
 end
 
-desc("Run example")
+desc('Run example')
 task :example do
-  ruby "-w -d -Ilib example/server/server.rb"
+  ruby '-w -d -Ilib example/server/server.rb'
 end
 
 task :console do

example/server/example_servlet.rb

@@ -2,7 +2,7 @@
 
 module ProductsFilter
   def price(integer)
-    format("$%.2d USD", integer / 100.0)
+    format('$%.2d USD', integer / 100.0)
   end
 
   def prettyprint(text)
@@ -30,17 +30,17 @@ class Servlet < LiquidServlet
   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' => 39_900, 'description' => 'the *arbor draft* is a excellent product' },
+     { 'name' => 'Arbor Element', 'price' => 40_000, 'description' => 'the *arbor element* rocks for freestyling' },
+     { 'name' => 'Arbor Diamond', 'price' => 59_900, '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' }]
+    [{ 'name' => 'Arbor Catalyst', 'price' => 39_900, 'description' => 'the *arbor catalyst* is an advanced drop-through for freestyle and flatground performance and versatility' },
+     { 'name' => 'Arbor Fish', 'price' => 40_000, '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."
+    'List of Products ~ This is a list of products with price and description.'
   end
 end

example/server/liquid_servlet.rb

@@ -1,27 +1,30 @@
 # frozen_string_literal: true
 
 class LiquidServlet < WEBrick::HTTPServlet::AbstractServlet
-  def do_GET(req, res)
+  def get(req, res)
     handle(:get, req, res)
   end
 
-  def do_POST(req, res)
+  def post(req, res)
     handle(:post, req, res)
   end
 
+  alias_method :do_GET, :get
+  alias_method :do_POST, :post
+
   private
 
   def handle(_type, req, res)
-    @request  = req
+    @request = req
     @response = res
 
     @request.path_info =~ /(\w+)\z/
-    @action  = Regexp.last_match(1) || 'index'
+    @action = Regexp.last_match(1) || 'index'
     @assigns = send(@action) if respond_to?(@action)
 
-    @response['Content-Type'] = "text/html"
+    @response['Content-Type'] = 'text/html'
     @response.status = 200
-    @response.body   = Liquid::Template.parse(read_template).render(@assigns, filters: [ProductsFilter])
+    @response.body = Liquid::Template.parse(read_template).render(@assigns, filters: [ProductsFilter])
   end
 
   def read_template(filename = @action)

example/server/server.rb

@@ -10,5 +10,5 @@ require_relative 'example_servlet'
 # Setup webrick
 server = WEBrick::HTTPServer.new(Port: ARGV[1] || 3000)
 server.mount('/', Servlet)
-trap("INT") { server.shutdown }
+trap('INT') { server.shutdown }
 server.start

lib/liquid.rb

@@ -22,31 +22,31 @@
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 module Liquid
-  FilterSeparator             = /\|/
-  ArgumentSeparator           = ','
-  FilterArgumentSeparator     = ':'
-  VariableAttributeSeparator  = '.'
-  WhitespaceControl           = '-'
-  TagStart                    = /\{\%/
-  TagEnd                      = /\%\}/
-  VariableSignature           = /\(?[\w\-\.\[\]]\)?/
-  VariableSegment             = /[\w\-]/
-  VariableStart               = /\{\{/
-  VariableEnd                 = /\}\}/
-  VariableIncompleteEnd       = /\}\}?/
-  QuotedString                = /"[^"]*"|'[^']*'/
-  QuotedFragment              = /#{QuotedString}|(?:[^\s,\|'"]|#{QuotedString})+/o
-  TagAttributes               = /(\w+)\s*\:\s*(#{QuotedFragment})/o
-  AnyStartingTag              = /#{TagStart}|#{VariableStart}/o
-  PartialTemplateParser       = /#{TagStart}.*?#{TagEnd}|#{VariableStart}.*?#{VariableIncompleteEnd}/om
-  TemplateParser              = /(#{PartialTemplateParser}|#{AnyStartingTag})/om
-  VariableParser              = /\[[^\]]+\]|#{VariableSegment}+\??/o
+  FILTER_SEPARATOR = /\|/.freeze
+  ARGUMENT_SEPARATOR = ','
+  FILTER_ARGUMENT_SEPARATOR = ':'
+  VARIABLE_ATTRIBUTE_SEPARATOR = '.'
+  WHITESPACE_CONTROL = '-'
+  TAG_START = /\{\%/.freeze
+  TAG_END = /\%\}/.freeze
+  VARIABLE_SIGNATURE = /\(?[\w\-\.\[\]]\)?/.freeze
+  VARIABLE_SEGMENT = /[\w\-]/.freeze
+  VARIABLE_START = /\{\{/.freeze
+  VARIABLE_END = /\}\}/.freeze
+  VARIABLE_INCOMPLETE_END = /\}\}?/.freeze
+  QUOTED_STRING = /"[^"]*"|'[^']*'/.freeze
+  QUOTED_FRAGMENT = /#{QUOTED_STRING}|(?:[^\s,\|'"]|#{QUOTED_STRING})+/o.freeze
+  TAG_ATTRIBUTES = /(\w+)\s*\:\s*(#{QUOTED_FRAGMENT})/o.freeze
+  ANY_STARTING_TAG = /#{TAG_START}|#{VARIABLE_START}/o.freeze
+  PARTIAL_TEMPLATE_PARSER = /#{TAG_START}.*?#{TAG_END}|#{VARIABLE_START}.*?#{VARIABLE_INCOMPLETE_END}/om.freeze
+  TEMPLATE_PARSER = /(#{PARTIAL_TEMPLATE_PARSER}|#{ANY_STARTING_TAG})/om.freeze
+  VARIABLE_PARSER = /\[[^\]]+\]|#{VARIABLE_SEGMENT}+\??/o.freeze
 
   singleton_class.send(:attr_accessor, :cache_classes)
   self.cache_classes = true
 end
 
-require "liquid/version"
+require 'liquid/version'
 require 'liquid/parse_tree_visitor'
 require 'liquid/lexer'
 require 'liquid/parser'
@@ -76,12 +76,7 @@ require 'liquid/condition'
 require 'liquid/utils'
 require 'liquid/tokenizer'
 require 'liquid/parse_context'
-require 'liquid/partial_cache'
-require 'liquid/usage'
-require 'liquid/register'
-require 'liquid/static_registers'
 
 # Load all the tags of the standard library
 #
 Dir["#{__dir__}/liquid/tags/*.rb"].each { |f| require f }
-Dir["#{__dir__}/liquid/registers/*.rb"].each { |f| require f }

lib/liquid/block.rb

@@ -30,15 +30,15 @@ module Liquid
 
     def unknown_tag(tag, _params, _tokens)
       if tag == 'else'
-        raise SyntaxError, parse_context.locale.t("errors.syntax.unexpected_else",
-          block_name: block_name)
+        raise SyntaxError, parse_context.locale.t('errors.syntax.unexpected_else',
+                                                  block_name: block_name)
       elsif tag.start_with?('end')
-        raise SyntaxError, parse_context.locale.t("errors.syntax.invalid_delimiter",
-          tag: tag,
-          block_name: block_name,
-          block_delimiter: block_delimiter)
+        raise SyntaxError, parse_context.locale.t('errors.syntax.invalid_delimiter',
+                                                  tag: tag,
+                                                  block_name: block_name,
+                                                  block_delimiter: block_delimiter)
       else
-        raise SyntaxError, parse_context.locale.t("errors.syntax.unknown_tag", tag: tag)
+        raise SyntaxError, parse_context.locale.t('errors.syntax.unknown_tag', tag: tag)
       end
     end
 
@@ -53,18 +53,15 @@ module Liquid
     protected
 
     def parse_body(body, tokens)
-      if parse_context.depth >= MAX_DEPTH
-        raise StackLevelError, "Nesting too deep"
-      end
+      raise StackLevelError, 'Nesting too deep' if parse_context.depth >= MAX_DEPTH
+
       parse_context.depth += 1
       begin
         body.parse(tokens, parse_context) do |end_tag_name, end_tag_params|
           @blank &&= body.blank?
 
           return false if end_tag_name == block_delimiter
-          unless end_tag_name
-            raise SyntaxError, parse_context.locale.t("errors.syntax.tag_never_closed", block_name: block_name)
-          end
+          raise SyntaxError, parse_context.locale.t('errors.syntax.tag_never_closed', block_name: block_name) unless end_tag_name
 
           # this tag is not registered with the system
           # pass it to the current block for special handling or error reporting

lib/liquid/block_body.rb

@@ -2,97 +2,49 @@
 
 module Liquid
   class BlockBody
-    LiquidTagToken      = /\A\s*(\w+)\s*(.*?)\z/o
-    FullToken           = /\A#{TagStart}#{WhitespaceControl}?(\s*)(\w+)(\s*)(.*?)#{WhitespaceControl}?#{TagEnd}\z/om
-    ContentOfVariable   = /\A#{VariableStart}#{WhitespaceControl}?(.*?)#{WhitespaceControl}?#{VariableEnd}\z/om
-    WhitespaceOrNothing = /\A\s*\z/
-    TAGSTART            = "{%"
-    VARSTART            = "{{"
+    FULL_TOKEN = /\A#{TAG_START}#{WHITESPACE_CONTROL}?\s*(\w+)\s*(.*?)#{WHITESPACE_CONTROL}?#{TAG_END}\z/om.freeze
+    CONTENT_OF_VARIABLE = /\A#{VARIABLE_START}#{WHITESPACE_CONTROL}?(.*?)#{WHITESPACE_CONTROL}?#{VARIABLE_END}\z/om.freeze
+    WHITESPACE_OR_NOTHING = /\A\s*\z/.freeze
+    TAG_START = '{%'
+    VAR_START = '{{'
 
     attr_reader :nodelist
 
     def initialize
       @nodelist = []
-      @blank    = true
+      @blank = true
     end
 
-    def parse(tokenizer, parse_context, &block)
+    def parse(tokenizer, parse_context)
       parse_context.line_number = tokenizer.line_number
-
-      if tokenizer.for_liquid_tag
-        parse_for_liquid_tag(tokenizer, parse_context, &block)
-      else
-        parse_for_document(tokenizer, parse_context, &block)
-      end
-    end
-
-    private def parse_for_liquid_tag(tokenizer, parse_context)
-      while (token = tokenizer.shift)
-        unless token.empty? || token =~ WhitespaceOrNothing
-          unless token =~ LiquidTagToken
-            # line isn't empty but didn't match tag syntax, yield and let the
-            # caller raise a syntax error
-            return yield token, token
-          end
-          tag_name = Regexp.last_match(1)
-          markup   = Regexp.last_match(2)
-          unless (tag = registered_tags[tag_name])
-            # end parsing if we reach an unknown tag and let the caller decide
-            # determine how to proceed
-            return yield tag_name, markup
-          end
-          new_tag = tag.parse(tag_name, markup, tokenizer, parse_context)
-          @blank &&= new_tag.blank?
-          @nodelist << new_tag
-        end
-        parse_context.line_number = tokenizer.line_number
-      end
-
-      yield nil, nil
-    end
-
-    private def parse_for_document(tokenizer, parse_context, &block)
       while (token = tokenizer.shift)
         next if token.empty?
+
         case
-        when token.start_with?(TAGSTART)
+        when token.start_with?(TAG_START)
           whitespace_handler(token, parse_context)
-          unless token =~ FullToken
-            raise_missing_tag_terminator(token, parse_context)
-          end
-          tag_name = Regexp.last_match(2)
-          markup   = Regexp.last_match(4)
-
-          if parse_context.line_number
-            # newlines inside the tag should increase the line number,
-            # particularly important for multiline {% liquid %} tags
-            parse_context.line_number += Regexp.last_match(1).count("\n") + Regexp.last_match(3).count("\n")
-          end
-
-          if tag_name == 'liquid'
-            liquid_tag_tokenizer = Tokenizer.new(markup, line_number: parse_context.line_number, for_liquid_tag: true)
-            next parse_for_liquid_tag(liquid_tag_tokenizer, parse_context, &block)
-          end
-
+          raise_missing_tag_terminator(token, parse_context) unless token =~ FULL_TOKEN
+          tag_name = Regexp.last_match(1)
+          markup = Regexp.last_match(2)
+          # fetch the tag from registered blocks
           unless (tag = registered_tags[tag_name])
             # end parsing if we reach an unknown tag and let the caller decide
             # determine how to proceed
             return yield tag_name, markup
           end
+
           new_tag = tag.parse(tag_name, markup, tokenizer, parse_context)
           @blank &&= new_tag.blank?
           @nodelist << new_tag
-        when token.start_with?(VARSTART)
+        when token.start_with?(VAR_START)
           whitespace_handler(token, parse_context)
           @nodelist << create_variable(token, parse_context)
           @blank = false
         else
-          if parse_context.trim_whitespace
-            token.lstrip!
-          end
+          token.lstrip! if parse_context.trim_whitespace
           parse_context.trim_whitespace = false
           @nodelist << token
-          @blank &&= !!(token =~ WhitespaceOrNothing)
+          @blank &&= token.match?(WHITESPACE_OR_NOTHING)
         end
         parse_context.line_number = tokenizer.line_number
       end
@@ -101,13 +53,11 @@ module Liquid
     end
 
     def whitespace_handler(token, parse_context)
-      if token[2] == WhitespaceControl
+      if token[2] == WHITESPACE_CONTROL
         previous_token = @nodelist.last
-        if previous_token.is_a?(String)
-          previous_token.rstrip!
-        end
+        previous_token.rstrip! if previous_token.is_a?(String)
       end
-      parse_context.trim_whitespace = (token[-3] == WhitespaceControl)
+      parse_context.trim_whitespace = (token[-3] == WHITESPACE_CONTROL)
     end
 
     def blank?
@@ -154,13 +104,7 @@ module Liquid
     private
 
     def render_node(context, output, node)
-      if node.disabled?(context)
-        output << node.disabled_error_message
-        return
-      end
-      disable_tags(context, node.disabled_tags) do
-        node.render_to_output_buffer(context, output)
-      end
+      node.render_to_output_buffer(context, output)
     rescue UndefinedVariable, UndefinedDropMethod, UndefinedFilter => e
       context.handle_error(e, node.line_number)
     rescue ::StandardError => e
@@ -168,19 +112,15 @@ module Liquid
       output << context.handle_error(e, line_number)
     end
 
-    def disable_tags(context, tags, &block)
-      return yield if tags.empty?
-      context.registers[:disabled_tags].disable(tags, &block)
-    end
-
     def raise_if_resource_limits_reached(context, length)
       context.resource_limits.render_length += length
       return unless context.resource_limits.reached?
-      raise MemoryError, "Memory limits exceeded"
+
+      raise MemoryError, 'Memory limits exceeded'
     end
 
     def create_variable(token, parse_context)
-      token.scan(ContentOfVariable) do |content|
+      token.scan(CONTENT_OF_VARIABLE) do |content|
         markup = content.first
         return Variable.new(markup, parse_context)
       end
@@ -188,11 +128,11 @@ module Liquid
     end
 
     def raise_missing_tag_terminator(token, parse_context)
-      raise SyntaxError, parse_context.locale.t("errors.syntax.tag_termination", token: token, tag_end: TagEnd.inspect)
+      raise SyntaxError, parse_context.locale.t('errors.syntax.tag_termination', token: token, tag_end: TAG_END.inspect)
     end
 
     def raise_missing_variable_terminator(token, parse_context)
-      raise SyntaxError, parse_context.locale.t("errors.syntax.variable_termination", token: token, tag_end: VariableEnd.inspect)
+      raise SyntaxError, parse_context.locale.t('errors.syntax.variable_termination', token: token, tag_end: VARIABLE_END.inspect)
     end
 
     def registered_tags

lib/liquid/condition.rb

@@ -9,7 +9,7 @@ module Liquid
   #   c.evaluate #=> true
   #
   class Condition #:nodoc:
-    @@operators = {
+    @operators = {
       '==' => ->(cond, left, right) {  cond.send(:equal_variables, left, right) },
       '!=' => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
       '<>' => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
@@ -27,19 +27,18 @@ module Liquid
       end,
     }
 
-    def self.operators
-      @@operators
+    class << self
+      attr_accessor :operators
     end
 
     attr_reader :attachment, :child_condition
     attr_accessor :left, :operator, :right
 
     def initialize(left = nil, operator = nil, right = nil)
-      @left     = left
+      @left = left
       @operator = operator
-      @right    = right
-
-      @child_relation  = nil
+      @right = right
+      @child_relation = nil
       @child_condition = nil
     end
 
@@ -63,12 +62,12 @@ module Liquid
     end
 
     def or(condition)
-      @child_relation  = :or
+      @child_relation = :or
       @child_condition = condition
     end
 
     def and(condition)
-      @child_relation  = :and
+      @child_relation = :and
       @child_condition = condition
     end
 
@@ -116,7 +115,7 @@ module Liquid
       # return this as the result.
       return context.evaluate(left) if op.nil?
 
-      left  = context.evaluate(left)
+      left = context.evaluate(left)
       right = context.evaluate(right)
 
       operation = self.class.operators[op] || raise(Liquid::ArgumentError, "Unknown operator #{op}")

lib/liquid/context.rb

@@ -14,38 +14,28 @@ module Liquid
   #
   #   context['bob']  #=> nil  class Context
   class Context
-    attr_reader :scopes, :errors, :registers, :environments, :resource_limits, :static_registers, :static_environments
+    attr_reader :scopes, :errors, :registers, :environments, :resource_limits
     attr_accessor :exception_renderer, :template_name, :partial, :global_filter, :strict_variables, :strict_filters
 
-    # rubocop:disable Metrics/ParameterLists
-    def self.build(environments: {}, outer_scope: {}, registers: {}, rethrow_errors: false, resource_limits: nil, static_environments: {})
-      new(environments, outer_scope, registers, rethrow_errors, resource_limits, static_environments)
-    end
-
-    def initialize(environments = {}, outer_scope = {}, registers = {}, rethrow_errors = false, resource_limits = nil, static_environments = {})
-      @environments = [environments]
-      @environments.flatten!
-
-      @static_environments = [static_environments].flat_map(&:freeze).freeze
-      @scopes              = [(outer_scope || {})]
-      @registers           = registers
-      @errors              = []
-      @partial             = false
-      @strict_variables    = false
-      @resource_limits     = resource_limits || ResourceLimits.new(Template.default_resource_limits)
-      @base_scope_depth    = 0
+    def initialize(environments = {}, outer_scope = {}, registers = {}, rethrow_errors = false, resource_limits = nil)
+      @environments     = [environments].flatten
+      @scopes           = [(outer_scope || {})]
+      @registers        = registers
+      @errors           = []
+      @partial          = false
+      @strict_variables = false
+      @resource_limits  = resource_limits || ResourceLimits.new(Template.default_resource_limits)
       squash_instance_assigns_with_environments
 
-      self.exception_renderer = Template.default_exception_renderer
-      if rethrow_errors
-        self.exception_renderer = ->(_e) { raise }
-      end
+      @this_stack_used = false
 
-      @interrupts    = []
-      @filters       = []
+      self.exception_renderer = Template.default_exception_renderer
+      self.exception_renderer = ->(_e) { raise } if rethrow_errors
+
+      @interrupts = []
+      @filters = []
       @global_filter = nil
     end
-    # rubocop:enable Metrics/ParameterLists
 
     def warnings
       @warnings ||= []
@@ -87,7 +77,7 @@ module Liquid
     def handle_error(e, line_number = nil)
       e = internal_error unless e.is_a?(Liquid::Error)
       e.template_name ||= template_name
-      e.line_number   ||= line_number
+      e.line_number ||= line_number
       errors.push(e)
       exception_renderer.call(e).to_s
     end
@@ -99,7 +89,7 @@ module Liquid
     # Push new local scope on the stack. use <tt>Context#stack</tt> instead
     def push(new_scope = {})
       @scopes.unshift(new_scope)
-      check_overflow
+      raise StackLevelError, 'Nesting too deep' if @scopes.length > Block::MAX_DEPTH
     end
 
     # Merge a hash of variables in the current local scope
@@ -110,6 +100,7 @@ module Liquid
     # Pop from the stack. use <tt>Context#stack</tt> instead
     def pop
       raise ContextError if @scopes.size == 1
+
       @scopes.shift
     end
 
@@ -121,30 +112,19 @@ module Liquid
     #   end
     #
     #   context['var]  #=> nil
-    def stack(new_scope = {})
-      push(new_scope)
+    def stack(new_scope = nil)
+      old_stack_used = @this_stack_used
+      if new_scope
+        push(new_scope)
+        @this_stack_used = true
+      else
+        @this_stack_used = false
+      end
+
       yield
     ensure
-      pop
-    end
-
-    # Creates a new context inheriting resource limits, filters, environment etc.,
-    # but with an isolated scope.
-    def new_isolated_subcontext
-      check_overflow
-
-      Context.build(
-        resource_limits: resource_limits,
-        static_environments: static_environments,
-        registers: StaticRegisters.new(registers)
-      ).tap do |subcontext|
-        subcontext.base_scope_depth   = base_scope_depth + 1
-        subcontext.exception_renderer = exception_renderer
-        subcontext.filters  = @filters
-        subcontext.strainer = nil
-        subcontext.errors   = errors
-        subcontext.warnings = warnings
-      end
+      pop if @this_stack_used
+      @this_stack_used = old_stack_used
     end
 
     def clear_instance_assigns
@@ -153,6 +133,10 @@ module Liquid
 
     # Only allow String, Numeric, Hash, Array, Proc, Boolean or <tt>Liquid::Drop</tt>
     def []=(key, value)
+      unless @this_stack_used
+        @this_stack_used = true
+        push({})
+      end
       @scopes[0][key] = value
     end
 
@@ -181,23 +165,33 @@ module Liquid
       # 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.key?(key) }
+      scope = @scopes[index] if index
 
-      variable = if index
-        lookup_and_evaluate(@scopes[index], key, raise_on_not_found: raise_on_not_found)
-      else
-        try_variable_find_in_environments(key, raise_on_not_found: raise_on_not_found)
+      variable = nil
+
+      if scope.nil?
+        @environments.each do |e|
+          variable = lookup_and_evaluate(e, key, raise_on_not_found: raise_on_not_found)
+          # When lookup returned a value OR there is no value but the lookup also did not raise
+          # then it is the value we are looking for.
+          if !variable.nil? || @strict_variables && raise_on_not_found
+            scope = e
+            break
+          end
+        end
       end
 
-      variable         = variable.to_liquid
+      scope ||= @environments.last || @scopes.last
+      variable ||= lookup_and_evaluate(scope, key, raise_on_not_found: raise_on_not_found)
+
+      variable = variable.to_liquid
       variable.context = self if variable.respond_to?(:context=)
 
       variable
     end
 
     def lookup_and_evaluate(obj, key, raise_on_not_found: true)
-      if @strict_variables && raise_on_not_found && obj.respond_to?(:key?) && !obj.key?(key)
-        raise Liquid::UndefinedVariable, "undefined variable #{key}"
-      end
+      raise Liquid::UndefinedVariable, "undefined variable #{key}" if @strict_variables && raise_on_not_found && obj.respond_to?(:key?) && !obj.key?(key)
 
       value = obj[key]
 
@@ -208,43 +202,13 @@ module Liquid
       end
     end
 
-    protected
-
-    attr_writer :base_scope_depth, :warnings, :errors, :strainer, :filters
-
     private
 
-    attr_reader :base_scope_depth
-
-    def try_variable_find_in_environments(key, raise_on_not_found:)
-      @environments.each do |environment|
-        found_variable = lookup_and_evaluate(environment, key, raise_on_not_found: raise_on_not_found)
-        if !found_variable.nil? || @strict_variables && raise_on_not_found
-          return found_variable
-        end
-      end
-      @static_environments.each do |environment|
-        found_variable = lookup_and_evaluate(environment, key, raise_on_not_found: raise_on_not_found)
-        if !found_variable.nil? || @strict_variables && raise_on_not_found
-          return found_variable
-        end
-      end
-      nil
-    end
-
-    def check_overflow
-      raise StackLevelError, "Nesting too deep" if overflow?
-    end
-
-    def overflow?
-      base_scope_depth + @scopes.length > Block::MAX_DEPTH
-    end
-
     def internal_error
       # raise and catch to set backtrace and cause on exception
       raise Liquid::InternalError, 'internal'
-    rescue Liquid::InternalError => exc
-      exc
+    rescue Liquid::InternalError => e
+      e
     end
 
     def squash_instance_assigns_with_environments

lib/liquid/document.rb

@@ -20,9 +20,9 @@ module Liquid
     def unknown_tag(tag, parse_context)
       case tag
       when 'else', 'end'
-        raise SyntaxError, parse_context.locale.t("errors.syntax.unexpected_outer_tag", tag: tag)
+        raise SyntaxError, parse_context.locale.t('errors.syntax.unexpected_outer_tag', tag: tag)
       else
-        raise SyntaxError, parse_context.locale.t("errors.syntax.unknown_tag", tag: tag)
+        raise SyntaxError, parse_context.locale.t('errors.syntax.unknown_tag', tag: tag)
       end
     end
   end

lib/liquid/drop.rb

@@ -28,6 +28,7 @@ module Liquid
     # Catch all for the method
     def liquid_method_missing(method)
       return nil unless @context&.strict_variables
+
       raise Liquid::UndefinedDropMethod, "undefined method #{method}"
     end
 
@@ -69,7 +70,7 @@ module Liquid
 
         if include?(Enumerable)
           blacklist += Enumerable.public_instance_methods
-          blacklist -= [:sort, :count, :first, :min, :max]
+          blacklist -= %i[sort count first min max include?]
         end
 
         whitelist = [:to_liquid] + (public_instance_methods - blacklist)

lib/liquid/errors.rb

@@ -7,12 +7,12 @@ module Liquid
     attr_accessor :markup_context
 
     def to_s(with_prefix = true)
-      str = +""
+      str = +''
       str << message_prefix if with_prefix
       str << super()
 
       if markup_context
-        str << " "
+        str << ' '
         str << markup_context
       end
 
@@ -22,37 +22,37 @@ module Liquid
     private
 
     def message_prefix
-      str = +""
+      str = +''
       str << if is_a?(SyntaxError)
-        "Liquid syntax error"
+        'Liquid syntax error'
       else
-        "Liquid error"
+        'Liquid error'
       end
 
       if line_number
-        str << " ("
-        str << template_name << " " if template_name
-        str << "line " << line_number.to_s << ")"
+        str << ' ('
+        str << template_name << ' ' if template_name
+        str << 'line ' << line_number.to_s << ')'
       end
 
-      str << ": "
+      str << ': '
       str
     end
   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)
-  ZeroDivisionError   = Class.new(Error)
-  FloatDomainError    = Class.new(Error)
-  UndefinedVariable   = Class.new(Error)
+  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)
+  ZeroDivisionError = Class.new(Error)
+  FloatDomainError = Class.new(Error)
+  UndefinedVariable = Class.new(Error)
   UndefinedDropMethod = Class.new(Error)
-  UndefinedFilter     = Class.new(Error)
+  UndefinedFilter = Class.new(Error)
   MethodOverrideError = Class.new(Error)
-  InternalError       = Class.new(Error)
+  InternalError = Class.new(Error)
 end

lib/liquid/expression.rb

@@ -23,11 +23,11 @@ module Liquid
       'empty' => MethodLiteral.new(:empty?, '').freeze
     }.freeze
 
-    SINGLE_QUOTED_STRING = /\A'(.*)'\z/m
-    DOUBLE_QUOTED_STRING = /\A"(.*)"\z/m
-    INTEGERS_REGEX       = /\A(-?\d+)\z/
-    FLOATS_REGEX         = /\A(-?\d[\d\.]+)\z/
-    RANGES_REGEX         = /\A\((\S+)\.\.(\S+)\)\z/
+    SINGLE_QUOTED_STRING = /\A'(.*)'\z/m.freeze
+    DOUBLE_QUOTED_STRING = /\A"(.*)"\z/m.freeze
+    INTEGERS_REGEX       = /\A(-?\d+)\z/.freeze
+    FLOATS_REGEX         = /\A(-?\d[\d\.]+)\z/.freeze
+    RANGES_REGEX         = /\A\((\S+)\.\.(\S+)\)\z/.freeze
 
     def self.parse(markup)
       if LITERALS.key?(markup)

lib/liquid/file_system.rb

@@ -17,7 +17,7 @@ module Liquid
   class BlankFileSystem
     # Called by Liquid to retrieve a template file
     def read_template_file(_template_path)
-      raise FileSystemError, "This liquid context does not allow includes."
+      raise FileSystemError, 'This liquid context does not allow includes.'
     end
   end
 
@@ -46,8 +46,8 @@ module Liquid
   class LocalFileSystem
     attr_accessor :root
 
-    def initialize(root, pattern = "_%s.liquid")
-      @root    = root
+    def initialize(root, pattern = '_%s.liquid')
+      @root = root
       @pattern = pattern
     end
 
@@ -59,7 +59,7 @@ module Liquid
     end
 
     def full_path(template_path)
-      raise FileSystemError, "Illegal template name '#{template_path}'" unless %r{\A[^./][a-zA-Z0-9_/]+\z}.match?(template_path)
+      raise FileSystemError, "Illegal template name '#{template_path}'" unless template_path =~ %r{\A[^./][a-zA-Z0-9_/]+\z}
 
       full_path = if template_path.include?('/')
         File.join(root, File.dirname(template_path), @pattern % File.basename(template_path))

lib/liquid/forloop_drop.rb

@@ -3,10 +3,10 @@
 module Liquid
   class ForloopDrop < Drop
     def initialize(name, length, parentloop)
-      @name       = name
-      @length     = length
+      @name = name
+      @length = length
       @parentloop = parentloop
-      @index      = 0
+      @index = 0
     end
 
     attr_reader :name, :length, :parentloop

lib/liquid/i18n.rb

@@ -4,7 +4,7 @@ require 'yaml'
 
 module Liquid
   class I18n
-    DEFAULT_LOCALE = File.join(File.expand_path(__dir__), "locales", "en.yml")
+    DEFAULT_LOCALE = File.join(File.expand_path(__dir__), 'locales', 'en.yml')
 
     TranslationError = Class.new(StandardError)
 

lib/liquid/interrupts.rb

@@ -6,13 +6,13 @@ module Liquid
     attr_reader :message
 
     def initialize(message = nil)
-      @message = message || "interrupt"
+      @message = message || 'interrupt'
     end
   end
 
   # Interrupt that is thrown whenever a {% break %} is called.
-  class BreakInterrupt < Interrupt; end
+  class BreakInterrupt < RuntimeError; end
 
   # Interrupt that is thrown whenever a {% continue %} is called.
-  class ContinueInterrupt < Interrupt; end
+  class ContinueInterrupt < RuntimeError; end
 end

lib/liquid/legacy.rb

@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+module Liquid
+  FilterSeparator = FILTER_SEPARATOR
+  ArgumentSeparator = ARGUMENT_SEPARATOR
+  FilterArgumentSeparator = FILTER_ARGUMENT_SEPARATOR
+  VariableAttributeSeparator = VARIABLE_ATTRIBUTE_SEPARATOR
+  WhitespaceControl = WHITESPACE_CONTROL
+  TagStart = TAG_START
+  TagEnd = TAG_END
+  VariableSignature = VARIABLE_SIGNATURE
+  VariableSegment = VARIABLE_SEGMENT
+  VariableStart = VARIABLE_START
+  VariableEnd = VARIABLE_END
+  VariableIncompleteEnd = VARIABLE_INCOMPLETE_END
+  QuotedString = QUOTED_STRING
+  QuotedFragment = QUOTED_FRAGMENT
+  TagAttributes = TAG_ATTRIBUTES
+  AnyStartingTag = ANY_STARTING_TAG
+  PartialTemplateParser = PARTIAL_TEMPLATE_PARSER
+  TemplateParser = TEMPLATE_PARSER
+  VariableParser = VARIABLE_PARSER
+
+  class BlockBody
+    FullToken = FULL_TOKEN
+    ContentOfVariable = CONTENT_OF_VARIABLE
+    WhitespaceOrNothing = WHITESPACE_OR_NOTHING
+    TAGSTART = TAG_START
+    VARSTART = VAR_START
+  end
+
+  class Assign < Tag
+    Syntax = SYNTAX
+  end
+
+  class Capture < Block
+    Syntax = SYNTAX
+  end
+
+  class Case < Block
+    Syntax     = SYNTAX
+    WhenSyntax = WHEN_SYNTAX
+  end
+
+  class Cycle < Tag
+    SimpleSyntax = SIMPLE_SYNTAX
+    NamedSyntax  = NAMED_SYNTAX
+  end
+
+  class For < Block
+    Syntax = SYNTAX
+  end
+
+  class If < Block
+    Syntax = SYNTAX
+    ExpressionsAndOperators = EXPRESSIONS_AND_OPERATORS
+  end
+
+  class Include < Tag
+    Syntax = SYNTAX
+  end
+
+  class Raw < Block
+    Syntax = SYNTAX
+    FullTokenPossiblyInvalid = FULL_TOKEN_POSSIBLY_INVALID
+  end
+
+  class TableRow < Block
+    Syntax = SYNTAX
+  end
+
+  class Variable
+    FilterMarkupRegex = FILTER_MARKUP_REGEX
+    FilterParser = FILTER_PARSER
+    FilterArgsRegex = FILTER_ARGS_REGEX
+    JustTagAttributes = JUST_TAG_ATTRIBUTES
+    MarkupWithQuotedFragment = MARKUP_WITH_QUOTED_FRAGMENT
+  end
+end

lib/liquid/lexer.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-require "strscan"
+require 'strscan'
 module Liquid
   class Lexer
     SPECIALS = {
@@ -15,13 +15,13 @@ module Liquid
       '?' => :question,
       '-' => :dash,
     }.freeze
-    IDENTIFIER            = /[a-zA-Z_][\w-]*\??/
-    SINGLE_STRING_LITERAL = /'[^\']*'/
-    DOUBLE_STRING_LITERAL = /"[^\"]*"/
-    NUMBER_LITERAL        = /-?\d+(\.\d+)?/
-    DOTDOT                = /\.\./
-    COMPARISON_OPERATOR   = /==|!=|<>|<=?|>=?|contains(?=\s)/
-    WHITESPACE_OR_NOTHING = /\s*/
+    IDENTIFIER = /[a-zA-Z_][\w-]*\??/.freeze
+    SINGLE_STRING_LITERAL = /'[^\']*'/.freeze
+    DOUBLE_STRING_LITERAL = /"[^\"]*"/.freeze
+    NUMBER_LITERAL = /-?\d+(\.\d+)?/.freeze
+    DOTDOT = /\.\./.freeze
+    COMPARISON_OPERATOR = /==|!=|<>|<=?|>=?|contains(?=\s)/.freeze
+    WHITESPACE_OR_NOTHING = /\s*/.freeze
 
     def initialize(input)
       @ss = StringScanner.new(input)
@@ -33,20 +33,15 @@ module Liquid
       until @ss.eos?
         @ss.skip(WHITESPACE_OR_NOTHING)
         break if @ss.eos?
-        tok      = if (t = @ss.scan(COMPARISON_OPERATOR))
-          [:comparison, t]
-        elsif (t = @ss.scan(SINGLE_STRING_LITERAL))
-          [:string, t]
-        elsif (t = @ss.scan(DOUBLE_STRING_LITERAL))
-          [:string, t]
-        elsif (t = @ss.scan(NUMBER_LITERAL))
-          [:number, t]
-        elsif (t = @ss.scan(IDENTIFIER))
-          [:id, t]
-        elsif (t = @ss.scan(DOTDOT))
-          [:dotdot, t]
+
+        tok = if (t = @ss.scan(COMPARISON_OPERATOR)) then [:comparison, t]
+        elsif (t = @ss.scan(SINGLE_STRING_LITERAL)) then [:string, t]
+        elsif (t = @ss.scan(DOUBLE_STRING_LITERAL)) then [:string, t]
+        elsif (t = @ss.scan(NUMBER_LITERAL)) then [:number, t]
+        elsif (t = @ss.scan(IDENTIFIER)) then [:id, t]
+        elsif (t = @ss.scan(DOTDOT)) then [:dotdot, t]
         else
-          c     = @ss.getch
+          c = @ss.getch
           if (s = SPECIALS[c])
             [s, c]
           else

lib/liquid/locales/en.yml

@@ -22,8 +22,5 @@
       tag_never_closed: "'%{block_name}' tag was never closed"
       meta_syntax_error: "Liquid syntax error: #{e.message}"
       table_row: "Syntax Error in 'table_row loop' - Valid syntax: table_row [item] in [collection] cols=3"
-      render: "Syntax error in tag 'render' - Template name must be a quoted string"
     argument:
       include: "Argument error in tag 'include' - Illegal template name"
-    disabled:
-      tag: "usage is not allowed in this context"

lib/liquid/parse_context.rb

@@ -7,11 +7,9 @@ module Liquid
 
     def initialize(options = {})
       @template_options = options ? options.dup : {}
-
-      @locale   = @template_options[:locale] ||= I18n.new
+      @locale = @template_options[:locale] ||= I18n.new
       @warnings = []
-
-      self.depth   = 0
+      self.depth = 0
       self.partial = false
     end
 
@@ -22,7 +20,6 @@ module Liquid
     def partial=(value)
       @partial = value
       @options = value ? partial_options : @template_options
-
       @error_mode = @options[:error_mode] || Template.error_mode
     end
 

lib/liquid/parse_tree_visitor.rb

@@ -11,7 +11,7 @@ module Liquid
     end
 
     def initialize(node, callbacks)
-      @node      = node
+      @node = node
       @callbacks = callbacks
     end
 

lib/liquid/parser.rb

@@ -3,9 +3,9 @@
 module Liquid
   class Parser
     def initialize(input)
-      l       = Lexer.new(input)
+      l = Lexer.new(input)
       @tokens = l.tokenize
-      @p      = 0 # pointer to current location
+      @p = 0 # pointer to current location
     end
 
     def jump(point)
@@ -14,9 +14,8 @@ module Liquid
 
     def consume(type = nil)
       token = @tokens[@p]
-      if type && token[0] != type
-        raise SyntaxError, "Expected #{type} but found #{@tokens[@p].first}"
-      end
+      raise SyntaxError, "Expected #{type} but found #{@tokens[@p].first}" if type && token[0] != type
+
       @p += 1
       token[1]
     end
@@ -27,6 +26,7 @@ module Liquid
     def consume?(type)
       token = @tokens[@p]
       return false unless token && token[0] == type
+
       @p += 1
       token[1]
     end
@@ -36,6 +36,7 @@ module Liquid
       token = @tokens[@p]
       return false unless token && token[0] == :id
       return false unless token[1] == str
+
       @p += 1
       token[1]
     end
@@ -43,10 +44,11 @@ module Liquid
     def look(type, ahead = 0)
       tok = @tokens[@p + ahead]
       return false unless tok
+
       tok[0] == type
     end
 
-    SINGLE_TOKEN_EXPRESSION_TYPES = [:string, :number].freeze
+    SINGLE_TOKEN_EXPRESSION_TYPES = %i[string number].freeze
     private_constant :SINGLE_TOKEN_EXPRESSION_TYPES
 
     def expression
@@ -68,11 +70,9 @@ module Liquid
     end
 
     def argument
-      str = +""
+      str = +''
       # might be a keyword argument (identifier: expression)
-      if look(:id) && look(:colon, 1)
-        str << consume << consume << ' '
-      end
+      str << consume << consume << ' ' if look(:id) && look(:colon, 1)
 
       str << expression
       str

lib/liquid/parser_switching.rb

@@ -21,7 +21,7 @@ module Liquid
     def strict_parse_with_error_context(markup)
       strict_parse(markup)
     rescue SyntaxError => e
-      e.line_number    = line_number
+      e.line_number = line_number
       e.markup_context = markup_context(markup)
       raise e
     end

lib/liquid/partial_cache.rb

@@ -1,21 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class PartialCache
-    def self.load(template_name, context:, parse_context:)
-      cached_partials = (context.registers[:cached_partials] ||= {})
-      cached = cached_partials[template_name]
-      return cached if cached
-
-      file_system = (context.registers[:file_system] ||= Liquid::Template.file_system)
-      source      = file_system.read_template_file(template_name)
-
-      parse_context.partial = true
-
-      partial = Liquid::Template.parse(source, parse_context)
-      cached_partials[template_name] = partial
-    ensure
-      parse_context.partial = false
-    end
-  end
-end

lib/liquid/profiler.rb

@@ -46,7 +46,7 @@ module Liquid
     include Enumerable
 
     class Timing
-      attr_reader :code, :partial, :line_number, :children, :total_time, :self_time
+      attr_reader :code, :partial, :line_number, :children
 
       def initialize(node, partial)
         @code        = node.respond_to?(:raw) ? node.raw : node
@@ -64,18 +64,7 @@ module Liquid
       end
 
       def finish
-        @end_time   = Time.now
-        @total_time = @end_time - @start_time
-
-        if @children.empty?
-          @self_time = @total_time
-        else
-          total_children_time = 0
-          @children.each do |child|
-            total_children_time += child.total_time
-          end
-          @self_time = @total_time - total_children_time
-        end
+        @end_time = Time.now
       end
 
       def render_time
@@ -109,14 +98,14 @@ module Liquid
       Thread.current[:liquid_profiler]
     end
 
-    def initialize(partial_name = "<root>")
-      @partial_stack = [partial_name]
+    def initialize
+      @partial_stack = ['<root>']
 
-      @root_timing  = Timing.new("", current_partial)
+      @root_timing = Timing.new('', current_partial)
       @timing_stack = [@root_timing]
 
       @render_start_at = Time.now
-      @render_end_at   = @render_start_at
+      @render_end_at = @render_start_at
     end
 
     def start

lib/liquid/range_lookup.rb

@@ -4,7 +4,7 @@ module Liquid
   class RangeLookup
     def self.parse(start_markup, end_markup)
       start_obj = Expression.parse(start_markup)
-      end_obj   = Expression.parse(end_markup)
+      end_obj = Expression.parse(end_markup)
       if start_obj.respond_to?(:evaluate) || end_obj.respond_to?(:evaluate)
         new(start_obj, end_obj)
       else
@@ -14,12 +14,12 @@ module Liquid
 
     def initialize(start_obj, end_obj)
       @start_obj = start_obj
-      @end_obj   = end_obj
+      @end_obj = end_obj
     end
 
     def evaluate(context)
       start_int = to_integer(context.evaluate(@start_obj))
-      end_int   = to_integer(context.evaluate(@end_obj))
+      end_int = to_integer(context.evaluate(@end_obj))
       start_int..end_int
     end
 

lib/liquid/register.rb

@@ -1,6 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class Register
-  end
-end

lib/liquid/registers/disabled_tags.rb

@@ -1,32 +0,0 @@
-# frozen_string_literal: true
-module Liquid
-  class DisabledTags < Register
-    def initialize
-      @disabled_tags = {}
-    end
-
-    def disabled?(tag)
-      @disabled_tags.key?(tag) && @disabled_tags[tag] > 0
-    end
-
-    def disable(tags)
-      tags.each(&method(:increment))
-      yield
-    ensure
-      tags.each(&method(:decrement))
-    end
-
-    private
-
-    def increment(tag)
-      @disabled_tags[tag] ||= 0
-      @disabled_tags[tag]  += 1
-    end
-
-    def decrement(tag)
-      @disabled_tags[tag] -= 1
-    end
-  end
-
-  Template.add_register(:disabled_tags, DisabledTags.new)
-end

lib/liquid/resource_limits.rb

@@ -3,12 +3,12 @@
 module Liquid
   class ResourceLimits
     attr_accessor :render_length, :render_score, :assign_score,
-      :render_length_limit, :render_score_limit, :assign_score_limit
+                  :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]
+      @render_score_limit = limits[:render_score_limit]
+      @assign_score_limit = limits[:assign_score_limit]
       reset
     end
 

lib/liquid/standardfilters.rb

@@ -12,13 +12,13 @@ module Liquid
       '"' => '"',
       "'" => ''',
     }.freeze
-    HTML_ESCAPE_ONCE_REGEXP = /["><']|&(?!([a-zA-Z]+|(#\d+));)/
-    STRIP_HTML_BLOCKS       = Regexp.union(
+    HTML_ESCAPE_ONCE_REGEXP = /["><']|&(?!([a-zA-Z]+|(#\d+));)/.freeze
+    STRIP_HTML_BLOCKS = Regexp.union(
       %r{<script.*?</script>}m,
       /<!--.*?-->/m,
       %r{<style.*?</style>}m
     )
-    STRIP_HTML_TAGS = /<.*?>/m
+    STRIP_HTML_TAGS = /<.*?>/m.freeze
 
     # Return the size of an array or of an string
     def size(input)
@@ -74,28 +74,25 @@ module Liquid
     end
 
     # Truncate a string down to x characters
-    def truncate(input, length = 50, truncate_string = "...")
+    def truncate(input, length = 50, truncate_string = '...')
       return if input.nil?
+
       input_str = input.to_s
-      length    = Utils.to_integer(length)
-
+      length = Utils.to_integer(length)
       truncate_string_str = truncate_string.to_s
-
       l = length - truncate_string_str.length
       l = 0 if l < 0
-
       input_str.length > length ? input_str[0...l].concat(truncate_string_str) : input_str
     end
 
-    def truncatewords(input, words = 15, truncate_string = "...")
+    def truncatewords(input, words = 15, truncate_string = '...')
       return if input.nil?
-      wordlist = input.to_s.split
-      words    = Utils.to_integer(words)
 
+      wordlist = input.to_s.split
+      words = Utils.to_integer(words)
       l = words - 1
       l = 0 if l < 0
-
-      wordlist.length > l ? wordlist[0..l].join(" ").concat(truncate_string.to_s) : input
+      wordlist.length > l ? wordlist[0..l].join(' ').concat(truncate_string.to_s) : input
     end
 
     # Split input string into an array of substrings separated by given pattern.
@@ -120,7 +117,7 @@ module Liquid
     end
 
     def strip_html(input)
-      empty  = ''
+      empty = ''
       result = input.to_s.gsub(STRIP_HTML_BLOCKS, empty)
       result.gsub!(STRIP_HTML_TAGS, empty)
       result
@@ -133,13 +130,13 @@ module Liquid
 
     # Join elements of the array with certain character between them
     def join(input, glue = ' ')
-      InputIterator.new(input, context).join(glue)
+      InputIterator.new(input).join(glue)
     end
 
     # Sort elements of the array
     # provide optional property with which to sort an array of hashes or drops
     def sort(input, property = nil)
-      ary = InputIterator.new(input, context)
+      ary = InputIterator.new(input)
 
       return [] if ary.empty?
 
@@ -159,7 +156,7 @@ module Liquid
     # 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, context)
+      ary = InputIterator.new(input)
 
       return [] if ary.empty?
 
@@ -179,7 +176,7 @@ module Liquid
     # Filter the elements of an array to those with a certain property value.
     # By default the target is any truthy value.
     def where(input, property, target_value = nil)
-      ary = InputIterator.new(input, context)
+      ary = InputIterator.new(input)
 
       if ary.empty?
         []
@@ -201,7 +198,7 @@ module Liquid
     # Remove duplicate elements from an array
     # provide optional property with which to determine uniqueness
     def uniq(input, property = nil)
-      ary = InputIterator.new(input, context)
+      ary = InputIterator.new(input)
 
       if property.nil?
         ary.uniq
@@ -218,16 +215,16 @@ module Liquid
 
     # Reverse the elements of an array
     def reverse(input)
-      ary = InputIterator.new(input, context)
+      ary = InputIterator.new(input)
       ary.reverse
     end
 
     # map/collect on a given property
     def map(input, property)
-      InputIterator.new(input, context).map do |e|
+      InputIterator.new(input).map do |e|
         e = e.call if e.is_a?(Proc)
 
-        if property == "to_liquid"
+        if property == 'to_liquid'
           e
         elsif e.respond_to?(:[])
           r = e[property]
@@ -241,7 +238,7 @@ module Liquid
     # Remove nils within an array
     # provide optional property with which to check for nil
     def compact(input, property = nil)
-      ary = InputIterator.new(input, context)
+      ary = InputIterator.new(input)
 
       if property.nil?
         ary.compact
@@ -282,10 +279,9 @@ module Liquid
     end
 
     def concat(input, array)
-      unless array.respond_to?(:to_ary)
-        raise ArgumentError, "concat filter requires an array argument"
-      end
-      InputIterator.new(input, context).concat(array)
+      raise ArgumentError, 'concat filter requires an array argument' unless array.respond_to?(:to_ary)
+
+      InputIterator.new(input).concat(array)
     end
 
     # prepend a string to another
@@ -426,26 +422,16 @@ module Liquid
       result.is_a?(BigDecimal) ? result.to_f : result
     end
 
-    # Set a default value when the input is nil, false or empty
-    #
-    # Example:
-    #    {{ product.title | default: "No Title" }}
-    #
-    # Use `allow_false` when an input should only be tested against nil or empty and not false.
-    #
-    # Example:
-    #    {{ product.title | default: "No Title", allow_false: true }}
-    #
-    def default(input, default_value = '', options = {})
-      options = {} unless options.is_a?(Hash)
-      false_check = options['allow_false'] ? input.nil? : !input
-      false_check || (input.respond_to?(:empty?) && input.empty?) ? default_value : input
+    def default(input, default_value = '')
+      if !input || input.respond_to?(:empty?) && input.empty?
+        default_value
+      else
+        input
+      end
     end
 
     private
 
-    attr_reader :context
-
     def raise_property_error(property)
       raise Liquid::ArgumentError, "cannot select the property '#{property}'"
     end
@@ -474,9 +460,8 @@ module Liquid
     class InputIterator
       include Enumerable
 
-      def initialize(input, context)
-        @context = context
-        @input   = if input.is_a?(Array)
+      def initialize(input)
+        @input = if input.is_a?(Array)
           input.flatten
         elsif input.is_a?(Hash)
           [input]
@@ -514,7 +499,6 @@ module Liquid
 
       def each
         @input.each do |e|
-          e.context = @context if e.respond_to?(:context=)
           yield(e.respond_to?(:to_liquid) ? e.to_liquid : e)
         end
       end

lib/liquid/static_registers.rb

@@ -1,36 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class StaticRegisters
-    attr_reader :static, :registers
-
-    def initialize(registers = {})
-      @static    = registers.is_a?(StaticRegisters) ? registers.static : registers
-      @registers = {}
-    end
-
-    def []=(key, value)
-      @registers[key] = value
-    end
-
-    def [](key)
-      if @registers.key?(key)
-        @registers[key]
-      else
-        @static[key]
-      end
-    end
-
-    def delete(key)
-      @registers.delete(key)
-    end
-
-    def fetch(key, default = nil)
-      key?(key) ? self[key] : default
-    end
-
-    def key?(key)
-      @registers.key?(key) || @static.key?(key)
-    end
-  end
-end

lib/liquid/strainer.rb

@@ -9,12 +9,12 @@ module Liquid
   # 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:
-    @@global_strainer = Class.new(Strainer) do
+    @global_strainer = Class.new(Strainer) do
       @filter_methods = Set.new
     end
-    @@strainer_class_cache = Hash.new do |hash, filters|
-      hash[filters] = Class.new(@@global_strainer) do
-        @filter_methods = @@global_strainer.filter_methods.dup
+    @strainer_class_cache = Hash.new do |hash, filters|
+      hash[filters] = Class.new(@global_strainer) do
+        @filter_methods = Strainer.global_strainer.filter_methods.dup
         filters.each { |f| add_filter(f) }
       end
     end
@@ -24,11 +24,13 @@ module Liquid
     end
 
     class << self
+      attr_accessor :strainer_class_cache, :global_strainer
       attr_reader :filter_methods
     end
 
     def self.add_filter(filter)
       raise ArgumentError, "Expected module but got: #{filter.class}" unless filter.is_a?(Module)
+
       unless include?(filter)
         invokable_non_public_methods = (filter.private_instance_methods + filter.protected_instance_methods).select { |m| invokable?(m) }
         if invokable_non_public_methods.any?
@@ -41,8 +43,8 @@ module Liquid
     end
 
     def self.global_filter(filter)
-      @@strainer_class_cache.clear
-      @@global_strainer.add_filter(filter)
+      @strainer_class_cache.clear
+      @global_strainer.add_filter(filter)
     end
 
     def self.invokable?(method)
@@ -50,7 +52,7 @@ module Liquid
     end
 
     def self.create(context, filters = [])
-      @@strainer_class_cache[filters].new(context)
+      @strainer_class_cache[filters].new(context)
     end
 
     def invoke(method, *args)

lib/liquid/tablerowloop_drop.rb

@@ -4,10 +4,10 @@ module Liquid
   class TablerowloopDrop < Drop
     def initialize(length, cols)
       @length = length
-      @row    = 1
-      @col    = 1
-      @cols   = cols
-      @index  = 0
+      @row = 1
+      @col = 1
+      @cols = cols
+      @index = 0
     end
 
     attr_reader :length, :col, :row

lib/liquid/tag.rb

@@ -7,32 +7,23 @@ module Liquid
     include ParserSwitching
 
     class << self
-      def parse(tag_name, markup, tokenizer, parse_context)
-        tag = new(tag_name, markup, parse_context)
+      def parse(tag_name, markup, tokenizer, options)
+        tag = new(tag_name, markup, options)
         tag.parse(tokenizer)
         tag
       end
 
-      def disable_tags(*tags)
-        disabled_tags.push(*tags)
-      end
-
       private :new
-
-      def disabled_tags
-        @disabled_tags ||= []
-      end
     end
 
     def initialize(tag_name, markup, parse_context)
-      @tag_name      = tag_name
-      @markup        = markup
+      @tag_name   = tag_name
+      @markup     = markup
       @parse_context = parse_context
-      @line_number   = parse_context.line_number
+      @line_number = parse_context.line_number
     end
 
-    def parse(_tokens)
-    end
+    def parse(_tokens); end
 
     def raw
       "#{@tag_name} #{@markup}"
@@ -46,14 +37,6 @@ module Liquid
       ''
     end
 
-    def disabled?(context)
-      context.registers[:disabled_tags].disabled?(tag_name)
-    end
-
-    def disabled_error_message
-      "#{tag_name} #{options[:locale].t('errors.disabled.tag')}"
-    end
-
     # For backwards compatibility with custom tags. In a future release, the semantics
     # of the `render_to_output_buffer` method will become the default and the `render`
     # method will be removed.
@@ -65,9 +48,5 @@ module Liquid
     def blank?
       false
     end
-
-    def disabled_tags
-      self.class.disabled_tags
-    end
   end
 end

lib/liquid/tags/assign.rb

@@ -10,21 +10,17 @@ module Liquid
   #  {{ foo }}
   #
   class Assign < Tag
-    Syntax = /(#{VariableSignature}+)\s*=\s*(.*)\s*/om
-
-    def self.syntax_error_translation_key
-      "errors.syntax.assign"
-    end
+    SYNTAX = /(#{VARIABLE_SIGNATURE}+)\s*=\s*(.*)\s*/om.freeze
 
     attr_reader :to, :from
 
     def initialize(tag_name, markup, options)
       super
-      if markup =~ Syntax
-        @to   = Regexp.last_match(1)
+      if markup =~ SYNTAX
+        @to = Regexp.last_match(1)
         @from = Variable.new(Regexp.last_match(2), options)
       else
-        raise SyntaxError, options[:locale].t(self.class.syntax_error_translation_key)
+        raise SyntaxError, options[:locale].t('errors.syntax.assign')
       end
     end
 

lib/liquid/tags/capture.rb

@@ -13,14 +13,14 @@ module Liquid
   # in a sidebar or footer.
   #
   class Capture < Block
-    Syntax = /(#{VariableSignature}+)/o
+    SYNTAX = /(#{VARIABLE_SIGNATURE}+)/o.freeze
 
     def initialize(tag_name, markup, options)
       super
-      if markup =~ Syntax
+      if markup =~ SYNTAX
         @to = Regexp.last_match(1)
       else
-        raise SyntaxError, options[:locale].t("errors.syntax.capture")
+        raise SyntaxError, options[:locale].t('errors.syntax.capture')
       end
     end
 

lib/liquid/tags/case.rb

@@ -2,8 +2,8 @@
 
 module Liquid
   class Case < Block
-    Syntax     = /(#{QuotedFragment})/o
-    WhenSyntax = /(#{QuotedFragment})(?:(?:\s+or\s+|\s*\,\s*)(#{QuotedFragment}.*))?/om
+    SYNTAX = /(#{QUOTED_FRAGMENT})/o.freeze
+    WHEN_SYNTAX = /(#{QUOTED_FRAGMENT})(?:(?:\s+or\s+|\s*\,\s*)(#{QUOTED_FRAGMENT}.*))?/om.freeze
 
     attr_reader :blocks, :left
 
@@ -11,10 +11,10 @@ module Liquid
       super
       @blocks = []
 
-      if markup =~ Syntax
+      if markup =~ SYNTAX
         @left = Expression.parse(Regexp.last_match(1))
       else
-        raise SyntaxError, options[:locale].t("errors.syntax.case")
+        raise SyntaxError, options[:locale].t('errors.syntax.case')
       end
     end
 
@@ -39,14 +39,16 @@ module Liquid
     end
 
     def render_to_output_buffer(context, output)
-      execute_else_block = true
+      context.stack do
+        execute_else_block = true
 
-      @blocks.each do |block|
-        if block.else?
-          block.attachment.render_to_output_buffer(context, output) if execute_else_block
-        elsif block.evaluate(context)
-          execute_else_block = false
-          block.attachment.render_to_output_buffer(context, output)
+        @blocks.each do |block|
+          if block.else?
+            block.attachment.render_to_output_buffer(context, output) if execute_else_block
+          elsif block.evaluate(context)
+            execute_else_block = false
+            block.attachment.render_to_output_buffer(context, output)
+          end
         end
       end
 
@@ -59,9 +61,7 @@ module Liquid
       body = BlockBody.new
 
       while markup
-        unless markup =~ WhenSyntax
-          raise SyntaxError, options[:locale].t("errors.syntax.case_invalid_when")
-        end
+        raise SyntaxError, options[:locale].t('errors.syntax.case_invalid_when') unless markup =~ WHEN_SYNTAX
 
         markup = Regexp.last_match(2)
 
@@ -72,9 +72,7 @@ module Liquid
     end
 
     def record_else_condition(markup)
-      unless markup.strip.empty?
-        raise SyntaxError, options[:locale].t("errors.syntax.case_invalid_else")
-      end
+      raise SyntaxError, options[:locale].t('errors.syntax.case_invalid_else') unless markup.strip.empty?
 
       block = ElseCondition.new
       block.attach(BlockBody.new)

lib/liquid/tags/comment.rb

@@ -6,8 +6,7 @@ module Liquid
       output
     end
 
-    def unknown_tag(_tag, _markup, _tokens)
-    end
+    def unknown_tag(_tag, _markup, _tokens); end
 
     def blank?
       true

lib/liquid/tags/cycle.rb

@@ -14,45 +14,47 @@ module Liquid
   #    <div class="green"> Item five</div>
   #
   class Cycle < Tag
-    SimpleSyntax = /\A#{QuotedFragment}+/o
-    NamedSyntax  = /\A(#{QuotedFragment})\s*\:\s*(.*)/om
+    SIMPLE_SYNTAX = /\A#{QUOTED_FRAGMENT}+/o.freeze
+    NAMED_SYNTAX  = /\A(#{QUOTED_FRAGMENT})\s*\:\s*(.*)/om.freeze
 
     attr_reader :variables
 
     def initialize(tag_name, markup, options)
       super
       case markup
-      when NamedSyntax
+      when NAMED_SYNTAX
         @variables = variables_from_string(Regexp.last_match(2))
-        @name      = Expression.parse(Regexp.last_match(1))
-      when SimpleSyntax
+        @name = Expression.parse(Regexp.last_match(1))
+      when SIMPLE_SYNTAX
         @variables = variables_from_string(markup)
-        @name      = @variables.to_s
+        @name = @variables.to_s
       else
-        raise SyntaxError, options[:locale].t("errors.syntax.cycle")
+        raise SyntaxError, options[:locale].t('errors.syntax.cycle')
       end
     end
 
     def render_to_output_buffer(context, output)
       context.registers[:cycle] ||= {}
 
-      key       = context.evaluate(@name)
-      iteration = context.registers[:cycle][key].to_i
+      context.stack do
+        key = context.evaluate(@name)
+        iteration = context.registers[:cycle][key].to_i
 
-      val = context.evaluate(@variables[iteration])
+        val = context.evaluate(@variables[iteration])
 
-      if val.is_a?(Array)
-        val = val.join
-      elsif !val.is_a?(String)
-        val = val.to_s
+        if val.is_a?(Array)
+          val = val.join
+        elsif !val.is_a?(String)
+          val = val.to_s
+        end
+
+        output << val
+
+        iteration += 1
+        iteration  = 0 if iteration >= @variables.size
+        context.registers[:cycle][key] = iteration
       end
 
-      output << val
-
-      iteration += 1
-      iteration = 0 if iteration >= @variables.size
-
-      context.registers[:cycle][key] = iteration
       output
     end
 
@@ -60,7 +62,7 @@ module Liquid
 
     def variables_from_string(markup)
       markup.split(',').collect do |var|
-        var =~ /\s*(#{QuotedFragment})\s*/o
+        var =~ /\s*(#{QUOTED_FRAGMENT})\s*/o
         Regexp.last_match(1) ? Expression.parse(Regexp.last_match(1)) : nil
       end.compact
     end

lib/liquid/tags/echo.rb

@@ -1,26 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  # Echo outputs an expression
-  #
-  #   {% echo monkey %}
-  #   {% echo user.name %}
-  #
-  # This is identical to variable output syntax, like {{ foo }}, but works
-  # inside {% liquid %} tags. The full syntax is supported, including filters:
-  #
-  #   {% echo user | link %}
-  #
-  class Echo < Tag
-    def initialize(tag_name, markup, parse_context)
-      super
-      @variable = Variable.new(markup, parse_context)
-    end
-
-    def render(context)
-      @variable.render_to_output_buffer(context, +'')
-    end
-  end
-
-  Template.register_tag('echo', Echo)
-end

lib/liquid/tags/for.rb

@@ -46,7 +46,7 @@ module Liquid
   # forloop.parentloop:: Provides access to the parent loop, if present.
   #
   class For < Block
-    Syntax = /\A(#{VariableSegment}+)\s+in\s+(#{QuotedFragment}+)\s*(reversed)?/o
+    SYNTAX = /\A(#{VARIABLE_SEGMENT}+)\s+in\s+(#{QUOTED_FRAGMENT}+)\s*(reversed)?/o.freeze
 
     attr_reader :collection_name, :variable_name, :limit, :from
 
@@ -60,6 +60,7 @@ module Liquid
 
     def parse(tokens)
       return unless parse_body(@for_block, tokens)
+
       parse_body(@else_block, tokens)
     end
 
@@ -69,6 +70,7 @@ module Liquid
 
     def unknown_tag(tag, markup, tokens)
       return super unless tag == 'else'
+
       @else_block = BlockBody.new
     end
 
@@ -87,35 +89,35 @@ module Liquid
     protected
 
     def lax_parse(markup)
-      if markup =~ Syntax
-        @variable_name   = Regexp.last_match(1)
-        collection_name  = Regexp.last_match(2)
-        @reversed        = !!Regexp.last_match(3)
-        @name            = "#{@variable_name}-#{collection_name}"
+      if markup =~ SYNTAX
+        @variable_name = Regexp.last_match(1)
+        collection_name = Regexp.last_match(2)
+        @reversed = !!Regexp.last_match(3)
+        @name = "#{@variable_name}-#{collection_name}"
         @collection_name = Expression.parse(collection_name)
-        markup.scan(TagAttributes) do |key, value|
+        markup.scan(TAG_ATTRIBUTES) do |key, value|
           set_attribute(key, value)
         end
       else
-        raise SyntaxError, options[:locale].t("errors.syntax.for")
+        raise SyntaxError, options[:locale].t('errors.syntax.for')
       end
     end
 
     def strict_parse(markup)
       p = Parser.new(markup)
       @variable_name = p.consume(:id)
-      raise SyntaxError, options[:locale].t("errors.syntax.for_invalid_in") unless p.id?('in')
+      raise SyntaxError, options[:locale].t('errors.syntax.for_invalid_in') unless p.id?('in')
 
-      collection_name  = p.expression
+      collection_name = p.expression
+      @name = "#{@variable_name}-#{collection_name}"
       @collection_name = Expression.parse(collection_name)
-
-      @name     = "#{@variable_name}-#{collection_name}"
       @reversed = p.id?('reversed')
 
       while p.look(:id) && p.look(:colon, 1)
         unless (attribute = p.id?('limit') || p.id?('offset'))
-          raise SyntaxError, options[:locale].t("errors.syntax.for_invalid_attribute")
+          raise SyntaxError, options[:locale].t('errors.syntax.for_invalid_attribute')
         end
+
         p.consume
         set_attribute(attribute, p.expression)
       end
@@ -158,7 +160,7 @@ module Liquid
 
     def render_segment(context, output, segment)
       for_stack = context.registers[:for_stack] ||= []
-      length    = segment.length
+      length = segment.length
 
       context.stack do
         loop_vars = Liquid::ForloopDrop.new(@name, length, for_stack[-1])
@@ -175,6 +177,7 @@ module Liquid
 
             # Handle any interrupts if they exist.
             next unless context.interrupt?
+
             interrupt = context.pop_interrupt
             break if interrupt.is_a?(BreakInterrupt)
             next if interrupt.is_a?(ContinueInterrupt)

lib/liquid/tags/if.rb

@@ -12,9 +12,9 @@ module Liquid
   #    There are {% if count < 5 %} less {% else %} more {% endif %} items than you need.
   #
   class If < Block
-    Syntax                  = /(#{QuotedFragment})\s*([=!<>a-z_]+)?\s*(#{QuotedFragment})?/o
-    ExpressionsAndOperators = /(?:\b(?:\s?and\s?|\s?or\s?)\b|(?:\s*(?!\b(?:\s?and\s?|\s?or\s?)\b)(?:#{QuotedFragment}|\S+)\s*)+)/o
-    BOOLEAN_OPERATORS       = %w(and or).freeze
+    SYNTAX = /(#{QUOTED_FRAGMENT})\s*([=!<>a-z_]+)?\s*(#{QUOTED_FRAGMENT})?/o.freeze
+    EXPRESSIONS_AND_OPERATORS = /(?:\b(?:\s?and\s?|\s?or\s?)\b|(?:\s*(?!\b(?:\s?and\s?|\s?or\s?)\b)(?:#{QUOTED_FRAGMENT}|\S+)\s*)+)/o.freeze
+    BOOLEAN_OPERATORS = %w[and or].freeze
 
     attr_reader :blocks
 
@@ -34,7 +34,7 @@ module Liquid
     end
 
     def unknown_tag(tag, markup, tokens)
-      if ['elsif', 'else'].include?(tag)
+      if %w[elsif else].include?(tag)
         push_block(tag, markup)
       else
         super
@@ -42,9 +42,9 @@ module Liquid
     end
 
     def render_to_output_buffer(context, output)
-      @blocks.each do |block|
-        if block.evaluate(context)
-          return block.attachment.render_to_output_buffer(context, output)
+      context.stack do
+        @blocks.each do |block|
+          return block.attachment.render_to_output_buffer(context, output) if block.evaluate(context)
         end
       end
 
@@ -65,18 +65,19 @@ module Liquid
     end
 
     def lax_parse(markup)
-      expressions = markup.scan(ExpressionsAndOperators)
-      raise SyntaxError, options[:locale].t("errors.syntax.if") unless expressions.pop =~ Syntax
+      expressions = markup.scan(EXPRESSIONS_AND_OPERATORS)
+      raise SyntaxError, options[:locale].t('errors.syntax.if') unless expressions.pop =~ SYNTAX
 
       condition = Condition.new(Expression.parse(Regexp.last_match(1)), Regexp.last_match(2), Expression.parse(Regexp.last_match(3)))
 
       until expressions.empty?
         operator = expressions.pop.to_s.strip
 
-        raise SyntaxError, options[:locale].t("errors.syntax.if") unless expressions.pop.to_s =~ Syntax
+        raise SyntaxError, options[:locale].t('errors.syntax.if') unless expressions.pop.to_s =~ SYNTAX
 
         new_condition = Condition.new(Expression.parse(Regexp.last_match(1)), Regexp.last_match(2), Expression.parse(Regexp.last_match(3)))
-        raise SyntaxError, options[:locale].t("errors.syntax.if") unless BOOLEAN_OPERATORS.include?(operator)
+        raise SyntaxError, options[:locale].t('errors.syntax.if') unless BOOLEAN_OPERATORS.include?(operator)
+
         new_condition.send(operator, condition)
         condition = new_condition
       end

lib/liquid/tags/ifchanged.rb

@@ -3,12 +3,14 @@
 module Liquid
   class Ifchanged < Block
     def render_to_output_buffer(context, output)
-      block_output = +''
-      super(context, block_output)
+      context.stack do
+        block_output = +''
+        super(context, block_output)
 
-      if block_output != context.registers[:ifchanged]
-        context.registers[:ifchanged] = block_output
-        output << block_output
+        if block_output != context.registers[:ifchanged]
+          context.registers[:ifchanged] = block_output
+          output << block_output
+        end
       end
 
       output

lib/liquid/tags/include.rb

@@ -16,8 +16,7 @@ module Liquid
   #   {% include 'product' for products %}
   #
   class Include < Tag
-    SYNTAX = /(#{QuotedFragment}+)(\s+(?:with|for)\s+(#{QuotedFragment}+))?(\s+(?:as)\s+(#{VariableSegment}+))?/o
-    Syntax = SYNTAX
+    SYNTAX = /(#{QUOTED_FRAGMENT}+)(\s+(?:with|for)\s+(#{QUOTED_FRAGMENT}+))?/o.freeze
 
     attr_reader :template_name_expr, :variable_name_expr, :attributes
 
@@ -29,45 +28,42 @@ module Liquid
         template_name = Regexp.last_match(1)
         variable_name = Regexp.last_match(3)
 
-        @alias_name         = Regexp.last_match(5)
         @variable_name_expr = variable_name ? Expression.parse(variable_name) : nil
         @template_name_expr = Expression.parse(template_name)
-        @attributes         = {}
+        @attributes = {}
 
-        markup.scan(TagAttributes) do |key, value|
+        markup.scan(TAG_ATTRIBUTES) do |key, value|
           @attributes[key] = Expression.parse(value)
         end
 
       else
-        raise SyntaxError, options[:locale].t("errors.syntax.include")
+        raise SyntaxError, options[:locale].t('errors.syntax.include')
       end
     end
 
-    def parse(_tokens)
-    end
+    def parse(_tokens); end
 
     def render_to_output_buffer(context, output)
       template_name = context.evaluate(@template_name_expr)
-      raise ArgumentError, options[:locale].t("errors.argument.include") unless template_name
+      raise ArgumentError, options[:locale].t('errors.argument.include') unless template_name
 
-      partial = load_partial(template_name, context, parse_context)
+      partial = load_cached_partial(template_name, context)
+      context_variable_name = template_name.split('/').last
+
+      variable = if @variable_name_expr
+        context.evaluate(@variable_name_expr)
+      else
+        context.find_variable(template_name, raise_on_not_found: false)
+      end
 
       old_template_name = context.template_name
-      old_partial       = context.partial
+      old_partial = context.partial
       begin
         context.template_name = template_name
-        context.partial       = true
+        context.partial = true
         context.stack do
           @attributes.each do |key, value|
-            context[key] = evaluate(context, value)
-          end
-
-          context_variable_name = @alias_name || template_name.split('/').last
-
-          variable = if @variable_name_expr
-            evaluate(context, @variable_name_expr)
-          else
-            find_variable(context, template_name, raise_on_not_found: false)
+            context[key] = context.evaluate(value)
           end
 
           if variable.is_a?(Array)
@@ -82,15 +78,42 @@ module Liquid
         end
       ensure
         context.template_name = old_template_name
-        context.partial       = old_partial
+        context.partial = old_partial
       end
 
       output
     end
 
+    private
+
     alias_method :parse_context, :options
     private :parse_context
 
+    def load_cached_partial(template_name, context)
+      cached_partials = context.registers[:cached_partials] || {}
+
+      if (cached = cached_partials[template_name])
+        return cached
+      end
+
+      source = read_template_from_file_system(context)
+      begin
+        parse_context.partial = true
+        partial = Liquid::Template.parse(source, parse_context)
+      ensure
+        parse_context.partial = false
+      end
+      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
+
+      file_system.read_template_file(context.evaluate(@template_name_expr))
+    end
+
     class ParseTreeVisitor < Liquid::ParseTreeVisitor
       def children
         [
@@ -99,24 +122,6 @@ module Liquid
         ] + @node.attributes.values
       end
     end
-
-    private
-
-    def evaluate(context, value)
-      context.evaluate(value)
-    end
-
-    def find_variable(context, *args)
-      context.find_variable(*args)
-    end
-
-    def load_partial(template_name, context, parse_context)
-      PartialCache.load(
-        template_name,
-        context: context,
-        parse_context: parse_context
-      )
-    end
   end
 
   Template.register_tag('include', Include)

lib/liquid/tags/increment.rb

@@ -25,7 +25,6 @@ module Liquid
     def render_to_output_buffer(context, output)
       value = context.environments.first[@variable] ||= 0
       context.environments.first[@variable] = value + 1
-
       output << value.to_s
       output
     end

lib/liquid/tags/raw.rb

@@ -2,8 +2,8 @@
 
 module Liquid
   class Raw < Block
-    Syntax = /\A\s*\z/
-    FullTokenPossiblyInvalid = /\A(.*)#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}\z/om
+    SYNTAX = /\A\s*\z/.freeze
+    FULL_TOKEN_POSSIBLY_INVALID = /\A(.*)#{TAG_START}\s*(\w+)\s*(.*)?#{TAG_END}\z/om.freeze
 
     def initialize(tag_name, markup, parse_context)
       super
@@ -14,14 +14,14 @@ module Liquid
     def parse(tokens)
       @body = +''
       while (token = tokens.shift)
-        if token =~ FullTokenPossiblyInvalid
-          @body << Regexp.last_match(1) if Regexp.last_match(1) != ""
+        if token =~ FULL_TOKEN_POSSIBLY_INVALID
+          @body << Regexp.last_match(1) if Regexp.last_match(1) != ''
           return if block_delimiter == Regexp.last_match(2)
         end
         @body << token unless token.empty?
       end
 
-      raise SyntaxError, parse_context.locale.t("errors.syntax.tag_never_closed", block_name: block_name)
+      raise SyntaxError, parse_context.locale.t('errors.syntax.tag_never_closed', block_name: block_name)
     end
 
     def render_to_output_buffer(_context, output)
@@ -40,9 +40,7 @@ module Liquid
     protected
 
     def ensure_valid_markup(tag_name, markup, parse_context)
-      unless Syntax.match?(markup)
-        raise SyntaxError, parse_context.locale.t("errors.syntax.tag_unexpected_args", tag: tag_name)
-      end
+      raise SyntaxError, parse_context.locale.t('errors.syntax.tag_unexpected_args', tag: tag_name) unless markup =~ SYNTAX
     end
   end
 

lib/liquid/tags/render.rb

@@ -1,94 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class Render < Tag
-    FOR = 'for'
-    SYNTAX = /(#{QuotedString}+)(\s+(with|#{FOR})\s+(#{QuotedFragment}+))?(\s+(?:as)\s+(#{VariableSegment}+))?/o
-
-    disable_tags "include"
-
-    attr_reader :template_name_expr, :attributes
-
-    def initialize(tag_name, markup, options)
-      super
-
-      raise SyntaxError, options[:locale].t("errors.syntax.render") unless markup =~ SYNTAX
-
-      template_name = Regexp.last_match(1)
-      with_or_for = Regexp.last_match(3)
-      variable_name = Regexp.last_match(4)
-
-      @alias_name = Regexp.last_match(6)
-      @variable_name_expr = variable_name ? Expression.parse(variable_name) : nil
-      @template_name_expr = Expression.parse(template_name)
-      @for = (with_or_for == FOR)
-
-      @attributes = {}
-      markup.scan(TagAttributes) do |key, value|
-        @attributes[key] = Expression.parse(value)
-      end
-    end
-
-    def render_to_output_buffer(context, output)
-      render_tag(context, output)
-    end
-
-    def render_tag(context, output)
-      # Though we evaluate this here we will only ever parse it as a string literal.
-      template_name = context.evaluate(@template_name_expr)
-      raise ArgumentError, options[:locale].t("errors.argument.include") unless template_name
-
-      partial = load_partial(template_name, context, parse_context)
-
-      context_variable_name = @alias_name || template_name.split('/').last
-
-      render_partial_func = ->(var, forloop) {
-        inner_context               = context.new_isolated_subcontext
-        inner_context.template_name = template_name
-        inner_context.partial       = true
-        inner_context['forloop']    = forloop if forloop
-
-        @attributes.each do |key, value|
-          inner_context[key] = evaluate(context, value)
-        end
-        inner_context[context_variable_name] = var unless var.nil?
-        partial.render_to_output_buffer(inner_context, output)
-        forloop&.send(:increment!)
-      }
-
-      variable = @variable_name_expr ? evaluate(context, @variable_name_expr) : nil
-      if @for && variable.respond_to?(:each) && variable.respond_to?(:count)
-        forloop = Liquid::ForloopDrop.new(template_name, variable.count, nil)
-        variable.each { |var| render_partial_func.call(var, forloop) }
-      else
-        render_partial_func.call(variable, nil)
-      end
-
-      output
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        [
-          @node.template_name_expr,
-        ] + @node.attributes.values
-      end
-    end
-
-    private
-
-    def evaluate(context, value)
-      context.evaluate(value)
-    end
-
-    def load_partial(template_name, context, parse_context)
-      PartialCache.load(
-        template_name,
-        context: context,
-        parse_context: parse_context
-      )
-    end
-  end
-
-  Template.register_tag('render', Render)
-end

lib/liquid/tags/table_row.rb

@@ -2,21 +2,21 @@
 
 module Liquid
   class TableRow < Block
-    Syntax = /(\w+)\s+in\s+(#{QuotedFragment}+)/o
+    SYNTAX = /(\w+)\s+in\s+(#{QUOTED_FRAGMENT}+)/o.freeze
 
     attr_reader :variable_name, :collection_name, :attributes
 
     def initialize(tag_name, markup, options)
       super
-      if markup =~ Syntax
-        @variable_name   = Regexp.last_match(1)
+      if markup =~ SYNTAX
+        @variable_name = Regexp.last_match(1)
         @collection_name = Expression.parse(Regexp.last_match(2))
-        @attributes      = {}
-        markup.scan(TagAttributes) do |key, value|
+        @attributes = {}
+        markup.scan(TAG_ATTRIBUTES) do |key, value|
           @attributes[key] = Expression.parse(value)
         end
       else
-        raise SyntaxError, options[:locale].t("errors.syntax.table_row")
+        raise SyntaxError, options[:locale].t('errors.syntax.table_row')
       end
     end
 
@@ -24,10 +24,11 @@ module Liquid
       (collection = context.evaluate(@collection_name)) || (return '')
 
       from = @attributes.key?('offset') ? context.evaluate(@attributes['offset']).to_i : 0
-      to   = @attributes.key?('limit')  ? from + context.evaluate(@attributes['limit']).to_i : nil
+      to = @attributes.key?('limit') ? from + context.evaluate(@attributes['limit']).to_i : nil
 
       collection = Utils.slice_collection(collection, from, to)
-      length     = collection.length
+
+      length = collection.length
 
       cols = context.evaluate(@attributes['cols']).to_i
 
@@ -43,9 +44,7 @@ module Liquid
           super
           output << '</td>'
 
-          if tablerowloop.col_last && !tablerowloop.last
-            output << "</tr>\n<tr class=\"row#{tablerowloop.row + 1}\">"
-          end
+          output << "</tr>\n<tr class=\"row#{tablerowloop.row + 1}\">" if tablerowloop.col_last && !tablerowloop.last
 
           tablerowloop.send(:increment!)
         end

lib/liquid/tags/unless.rb

@@ -9,16 +9,14 @@ module Liquid
   #
   class Unless < If
     def render_to_output_buffer(context, output)
-      # First condition is interpreted backwards ( if not )
-      first_block = @blocks.first
-      unless first_block.evaluate(context)
-        return first_block.attachment.render_to_output_buffer(context, output)
-      end
+      context.stack do
+        # First condition is interpreted backwards ( if not )
+        first_block = @blocks.first
+        return first_block.attachment.render_to_output_buffer(context, output) unless first_block.evaluate(context)
 
-      # After the first condition unless works just like if
-      @blocks[1..-1].each do |block|
-        if block.evaluate(context)
-          return block.attachment.render_to_output_buffer(context, output)
+        # After the first condition unless works just like if
+        @blocks[1..-1].each do |block|
+          return block.attachment.render_to_output_buffer(context, output) if block.evaluate(context)
         end
       end
 

lib/liquid/template.rb

@@ -18,13 +18,17 @@ module Liquid
     attr_accessor :root
     attr_reader :resource_limits, :warnings
 
-    @@file_system = BlankFileSystem.new
+    @file_system = BlankFileSystem.new
+
+    class << self
+      attr_accessor :file_system
+    end
 
     class TagRegistry
       include Enumerable
 
       def initialize
-        @tags  = {}
+        @tags = {}
         @cache = {}
       end
 
@@ -76,14 +80,6 @@ module Liquid
         exception
       end
 
-      def file_system
-        @@file_system
-      end
-
-      def file_system=(obj)
-        @@file_system = obj
-      end
-
       def register_tag(name, klass)
         tags[name.to_s] = klass
       end
@@ -92,14 +88,6 @@ module Liquid
         @tags ||= TagRegistry.new
       end
 
-      def add_register(name, klass)
-        registers[name.to_sym] = klass
-      end
-
-      def registers
-        @registers ||= {}
-      end
-
       def error_mode
         @error_mode ||= :lax
       end
@@ -128,19 +116,19 @@ module Liquid
     end
 
     def initialize
-      @rethrow_errors  = false
+      @rethrow_errors = false
       @resource_limits = ResourceLimits.new(self.class.default_resource_limits)
     end
 
     # Parse source code.
     # Returns self for easy chaining
     def parse(source, options = {})
-      @options      = options
-      @profiling    = options[:profile]
+      @options = options
+      @profiling = options[:profile]
       @line_numbers = options[:line_numbers] || @profiling
       parse_context = options.is_a?(ParseContext) ? options : ParseContext.new(options)
-      @root         = Document.parse(tokenize(source), parse_context)
-      @warnings     = parse_context.warnings
+      @root = Document.parse(tokenize(source), parse_context)
+      @warnings = parse_context.warnings
       self
     end
 
@@ -181,44 +169,34 @@ module Liquid
       when Liquid::Context
         c = args.shift
 
-        if @rethrow_errors
-          c.exception_renderer = ->(_e) { raise }
-        end
+        c.exception_renderer = ->(_e) { raise } if @rethrow_errors
 
         c
       when Liquid::Drop
-        drop         = args.shift
+        drop = args.shift
         drop.context = Context.new([drop, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits)
       when Hash
         Context.new([args.shift, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits)
       when nil
         Context.new(assigns, instance_assigns, registers, @rethrow_errors, @resource_limits)
       else
-        raise ArgumentError, "Expected Hash or Liquid::Context as parameter"
+        raise ArgumentError, 'Expected Hash or Liquid::Context as parameter'
       end
 
       output = nil
 
-      context_register = context.registers.is_a?(StaticRegisters) ? context.registers.static : context.registers
-
       case args.last
       when Hash
         options = args.pop
-        output  = options[:output] if options[:output]
+        output = options[:output] if options[:output]
 
-        options[:registers]&.each do |key, register|
-          context_register[key] = register
-        end
+        registers.merge!(options[:registers]) if options[:registers].is_a?(Hash)
 
         apply_options_to_context(context, options)
       when Module, Array
         context.add_filters(args.pop)
       end
 
-      Template.registers.each do |key, register|
-        context_register[key] = register
-      end
-
       # Retrying a render resets resource usage
       context.resource_limits.reset
 
@@ -254,7 +232,7 @@ module Liquid
       if @profiling && !context.partial
         raise "Profiler not loaded, require 'liquid/profiler' first" unless defined?(Liquid::Profiler)
 
-        @profiler = Profiler.new(context.template_name)
+        @profiler = Profiler.new
         @profiler.start
 
         begin
@@ -269,10 +247,10 @@ module Liquid
 
     def apply_options_to_context(context, options)
       context.add_filters(options[:filters]) if options[:filters]
-      context.global_filter      = options[:global_filter] if options[:global_filter]
+      context.global_filter = options[:global_filter] if options[:global_filter]
       context.exception_renderer = options[:exception_renderer] if options[:exception_renderer]
-      context.strict_variables   = options[:strict_variables] if options[:strict_variables]
-      context.strict_filters     = options[:strict_filters] if options[:strict_filters]
+      context.strict_variables = options[:strict_variables] if options[:strict_variables]
+      context.strict_filters = options[:strict_filters] if options[:strict_filters]
     end
   end
 end

lib/liquid/tokenizer.rb

@@ -2,33 +2,27 @@
 
 module Liquid
   class Tokenizer
-    attr_reader :line_number, :for_liquid_tag
+    attr_reader :line_number
 
-    def initialize(source, line_numbers = false, line_number: nil, for_liquid_tag: false)
-      @source         = source
-      @line_number    = line_number || (line_numbers ? 1 : nil)
-      @for_liquid_tag = for_liquid_tag
-      @tokens         = tokenize
+    def initialize(source, line_numbers = false)
+      @source = source
+      @line_number = line_numbers ? 1 : nil
+      @tokens = tokenize
     end
 
     def shift
-      (token = @tokens.shift) || return
-
-      if @line_number
-        @line_number += @for_liquid_tag ? 1 : token.count("\n")
-      end
-
+      token = @tokens.shift
+      @line_number += token.count("\n") if @line_number && token
       token
     end
 
     private
 
     def tokenize
+      @source = @source.source if @source.respond_to?(:source)
       return [] if @source.to_s.empty?
 
-      return @source.split("\n") if @for_liquid_tag
-
-      tokens = @source.split(TemplateParser)
+      tokens = @source.split(TEMPLATE_PARSER)
 
       # removes the rogue empty element at the beginning of the array
       tokens.shift if tokens[0]&.empty?

lib/liquid/usage.rb

@@ -1,8 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  module Usage
-    def self.increment(name)
-    end
-  end
-end

lib/liquid/utils.rb

@@ -12,7 +12,7 @@ module Liquid
 
     def self.slice_collection_using_each(collection, from, to)
       segments = []
-      index    = 0
+      index = 0
 
       # Maintains Ruby 1.8.7 String#each behaviour on 1.9
       if collection.is_a?(String)
@@ -21,13 +21,9 @@ module Liquid
       return [] unless collection.respond_to?(:each)
 
       collection.each do |item|
-        if to && to <= index
-          break
-        end
+        break if to && to <= index
 
-        if from <= index
-          segments << item
-        end
+        segments << item if from <= index
 
         index += 1
       end
@@ -37,11 +33,12 @@ module Liquid
 
     def self.to_integer(num)
       return num if num.is_a?(Integer)
+
       num = num.to_s
       begin
         Integer(num)
       rescue ::ArgumentError
-        raise Liquid::ArgumentError, "invalid integer"
+        raise Liquid::ArgumentError, 'invalid integer'
       end
     end
 
@@ -52,7 +49,7 @@ module Liquid
       when Numeric
         obj
       when String
-        /\A-?\d+\.\d+\z/.match?(obj.strip) ? BigDecimal(obj) : obj.to_i
+        obj.strip =~ /\A-?\d+\.\d+\z/ ? BigDecimal(obj) : obj.to_i
       else
         if obj.respond_to?(:to_number)
           obj.to_number
@@ -67,6 +64,7 @@ module Liquid
 
       if obj.is_a?(String)
         return nil if obj.empty?
+
         obj = obj.downcase
       end
 

lib/liquid/variable.rb

@@ -12,11 +12,11 @@ module Liquid
   #   {{ user | link }}
   #
   class Variable
-    FilterMarkupRegex        = /#{FilterSeparator}\s*(.*)/om
-    FilterParser             = /(?:\s+|#{QuotedFragment}|#{ArgumentSeparator})+/o
-    FilterArgsRegex          = /(?:#{FilterArgumentSeparator}|#{ArgumentSeparator})\s*((?:\w+\s*\:\s*)?#{QuotedFragment})/o
-    JustTagAttributes        = /\A#{TagAttributes}\z/o
-    MarkupWithQuotedFragment = /(#{QuotedFragment})(.*)/om
+    FILTER_MARKUP_REGEX = /#{FILTER_SEPARATOR}\s*(.*)/om.freeze
+    FILTER_PARSER = /(?:\s+|#{QUOTED_FRAGMENT}|#{ARGUMENT_SEPARATOR})+/o.freeze
+    FILTER_ARGS_REGEX = /(?:#{FILTER_ARGUMENT_SEPARATOR}|#{ARGUMENT_SEPARATOR})\s*((?:\w+\s*\:\s*)?#{QUOTED_FRAGMENT})/o.freeze
+    JUST_TAG_ATTRIBUTES = /\A#{TAG_ATTRIBUTES}\z/o.freeze
+    MARKUP_WITH_QUOTED_FRAGMENT = /(#{QUOTED_FRAGMENT})(.*)/om.freeze
 
     attr_accessor :filters, :name, :line_number
     attr_reader :parse_context
@@ -25,10 +25,10 @@ module Liquid
     include ParserSwitching
 
     def initialize(markup, parse_context)
-      @markup        = markup
-      @name          = nil
+      @markup  = markup
+      @name    = nil
       @parse_context = parse_context
-      @line_number   = parse_context.line_number
+      @line_number = parse_context.line_number
 
       parse_with_selected_parser(markup)
     end
@@ -43,17 +43,18 @@ module Liquid
 
     def lax_parse(markup)
       @filters = []
-      return unless markup =~ MarkupWithQuotedFragment
+      return unless markup =~ MARKUP_WITH_QUOTED_FRAGMENT
 
-      name_markup   = Regexp.last_match(1)
+      name_markup = Regexp.last_match(1)
       filter_markup = Regexp.last_match(2)
-      @name         = Expression.parse(name_markup)
-      if filter_markup =~ FilterMarkupRegex
-        filters = Regexp.last_match(1).scan(FilterParser)
+      @name = Expression.parse(name_markup)
+      if filter_markup =~ FILTER_MARKUP_REGEX
+        filters = Regexp.last_match(1).scan(FILTER_PARSER)
         filters.each do |f|
           next unless f =~ /\w+/
+
           filtername = Regexp.last_match(0)
-          filterargs = f.scan(FilterArgsRegex).flatten
+          filterargs = f.scan(FILTER_ARGS_REGEX).flatten
           @filters << parse_filter_expressions(filtername, filterargs)
         end
       end
@@ -104,22 +105,14 @@ module Liquid
       output
     end
 
-    def disabled?(_context)
-      false
-    end
-
-    def disabled_tags
-      []
-    end
-
     private
 
     def parse_filter_expressions(filter_name, unparsed_args)
-      filter_args  = []
+      filter_args = []
       keyword_args = nil
       unparsed_args.each do |a|
-        if (matches = a.match(JustTagAttributes))
-          keyword_args           ||= {}
+        if (matches = a.match(JUST_TAG_ATTRIBUTES))
+          keyword_args ||= {}
           keyword_args[matches[1]] = Expression.parse(matches[2])
         else
           filter_args << Expression.parse(a)
@@ -146,11 +139,11 @@ module Liquid
       return unless obj.tainted?
       return if Template.taint_mode == :lax
 
-      @markup =~ QuotedFragment
+      @markup =~ QUOTED_FRAGMENT
       name = Regexp.last_match(0)
 
-      error               = TaintedError.new("variable '#{name}' is tainted and was not escaped")
-      error.line_number   = line_number
+      error = TaintedError.new("variable '#{name}' is tainted and was not escaped")
+      error.line_number = line_number
       error.template_name = context.template_name
 
       case Template.taint_mode

lib/liquid/variable_lookup.rb

@@ -2,8 +2,8 @@
 
 module Liquid
   class VariableLookup
-    SQUARE_BRACKETED = /\A\[(.*)\]\z/m
-    COMMAND_METHODS  = ['size', 'first', 'last'].freeze
+    SQUARE_BRACKETED = /\A\[(.*)\]\z/m.freeze
+    COMMAND_METHODS = %w[size first last].freeze
 
     attr_reader :name, :lookups
 
@@ -12,15 +12,13 @@ module Liquid
     end
 
     def initialize(markup)
-      lookups = markup.scan(VariableParser)
+      lookups = markup.scan(VARIABLE_PARSER)
 
       name = lookups.shift
-      if name =~ SQUARE_BRACKETED
-        name = Expression.parse(Regexp.last_match(1))
-      end
+      name = Expression.parse(Regexp.last_match(1)) if name =~ SQUARE_BRACKETED
       @name = name
 
-      @lookups       = lookups
+      @lookups = lookups
       @command_flags = 0
 
       @lookups.each_index do |i|
@@ -34,7 +32,7 @@ module Liquid
     end
 
     def evaluate(context)
-      name   = context.evaluate(@name)
+      name = context.evaluate(@name)
       object = context.find_variable(name)
 
       @lookups.each_index do |i|
@@ -43,11 +41,11 @@ 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?(:key?) && object.key?(key)) ||
-             (object.respond_to?(:fetch) && key.is_a?(Integer)))
+           ((object.respond_to?(:key?) && object.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)
+          res = context.lookup_and_evaluate(object, key)
           object = res.to_liquid
 
           # Some special cases. If the part wasn't in square brackets and
@@ -61,6 +59,7 @@ module Liquid
           # raise an exception if `strict_variables` option is set to true
         else
           return nil unless context.strict_variables
+
           raise Liquid::UndefinedVariable, "undefined variable #{key}"
         end
 

lib/liquid/version.rb

@@ -1,6 +1,5 @@
-# encoding: utf-8
 # frozen_string_literal: true
 
 module Liquid
-  VERSION = "4.0.3"
+  VERSION = '4.0.3'
 end

liquid.gemspec

@@ -1,32 +1,31 @@
-# encoding: utf-8
 # frozen_string_literal: true
 
-lib = File.expand_path('../lib/', __FILE__)
+lib = File.expand_path('lib', __dir__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
-require "liquid/version"
+require 'liquid/version'
 
 Gem::Specification.new do |s|
-  s.name        = "liquid"
+  s.name        = 'liquid'
   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 Lütke"]
-  s.email       = ["tobi@leetsoft.com"]
-  s.homepage    = "http://www.liquidmarkup.org"
-  s.license     = "MIT"
+  s.summary     = 'A secure, non-evaling end user template engine with aesthetic markup.'
+  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.required_ruby_version     = ">= 2.4.0"
-  s.required_rubygems_version = ">= 1.3.7"
+  s.required_ruby_version     = '>= 2.4.0'
+  s.required_rubygems_version = '>= 1.3.7'
 
-  s.test_files  = Dir.glob("{test}/**/*")
-  s.files       = Dir.glob("{lib}/**/*") + %w(LICENSE README.md)
+  s.test_files  = Dir.glob('{test}/**/*')
+  s.files       = Dir.glob('{lib}/**/*') + %w[LICENSE README.md]
 
-  s.extra_rdoc_files = ["History.md", "README.md"]
+  s.extra_rdoc_files = ['History.md', 'README.md']
 
-  s.require_path = "lib"
+  s.require_path = 'lib'
 
-  s.add_development_dependency('rake', '~> 11.3')
   s.add_development_dependency('minitest')
+  s.add_development_dependency('rake', '~> 11.3')
 end

performance/benchmark.rb

@@ -7,14 +7,14 @@ Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
 profiler = ThemeRunner.new
 
 Benchmark.ips do |x|
-  x.time   = 10
+  x.time = 10
   x.warmup = 5
 
   puts
   puts "Running benchmark for #{x.time} seconds (with #{x.warmup} seconds warmup)."
   puts
 
-  x.report("parse:") { profiler.compile }
-  x.report("render:") { profiler.render }
-  x.report("parse & render:") { profiler.run }
+  x.report('parse:') { profiler.compile }
+  x.report('render:') { profiler.render }
+  x.report('parse & render:') { profiler.run }
 end

performance/memory_profile.rb

@@ -2,62 +2,25 @@
 
 require 'benchmark/ips'
 require 'memory_profiler'
-require 'terminal-table'
 require_relative 'theme_runner'
 
-class Profiler
-  LOG_LABEL   = "Profiling: ".rjust(14).freeze
-  REPORTS_DIR = File.expand_path('.memprof', __dir__).freeze
+def profile(phase, &block)
+  puts
+  puts "#{phase}:"
+  puts
 
-  def self.run
-    puts
-    yield new
-  end
+  report = MemoryProfiler.report(&block)
 
-  def initialize
-    @allocated = []
-    @retained  = []
-    @headings  = []
-  end
-
-  def profile(phase, &block)
-    print(LOG_LABEL)
-    print("#{phase}.. ".ljust(10))
-    report = MemoryProfiler.report(&block)
-    puts 'Done.'
-    @headings  << phase.capitalize
-    @allocated << "#{report.scale_bytes(report.total_allocated_memsize)} (#{report.total_allocated} objects)"
-    @retained  << "#{report.scale_bytes(report.total_retained_memsize)} (#{report.total_retained} objects)"
-
-    return if ENV['CI']
-
-    require 'fileutils'
-    report_file = File.join(REPORTS_DIR, "#{sanitize(phase)}.txt")
-    FileUtils.mkdir_p(REPORTS_DIR)
-    report.pretty_print(to_file: report_file, scale_bytes: true)
-  end
-
-  def tabulate
-    table = Terminal::Table.new(headings: @headings.unshift('Phase')) do |t|
-      t << @allocated.unshift('Total allocated')
-      t << @retained.unshift('Total retained')
-    end
-
-    puts
-    puts table
-    puts "\nDetailed report(s) saved to #{REPORTS_DIR}/" unless ENV['CI']
-  end
-
-  def sanitize(string)
-    string.downcase.gsub(/[\W]/, '-').squeeze('-')
-  end
+  report.pretty_print(
+    color_output: true,
+    scale_bytes: true,
+    detailed_report: true
+  )
 end
 
 Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
 
-runner = ThemeRunner.new
-Profiler.run do |x|
-  x.profile('parse') { runner.compile }
-  x.profile('render') { runner.render }
-  x.tabulate
-end
+profiler = ThemeRunner.new
+
+profile('Parsing') { profiler.compile }
+profile('Rendering') { profiler.render }

performance/profile.rb

@@ -7,7 +7,7 @@ Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
 profiler = ThemeRunner.new
 profiler.run
 
-[:cpu, :object].each do |profile_type|
+%i[cpu object].each do |profile_type|
   puts "Profiling in #{profile_type} mode..."
   results = StackProf.run(mode: profile_type) do
     200.times do
@@ -22,5 +22,5 @@ profiler.run
   end
 
   StackProf::Report.new(results).print_text(false, 20)
-  File.write(ENV['FILENAME'] + "." + profile_type.to_s, Marshal.dump(results)) if ENV['FILENAME']
+  File.write(ENV['FILENAME'] + '.' + profile_type.to_s, Marshal.dump(results)) if ENV['FILENAME']
 end

performance/shopify/comment_form.rb

@@ -1,14 +1,14 @@
 # frozen_string_literal: true
 
 class CommentForm < Liquid::Block
-  Syntax = /(#{Liquid::VariableSignature}+)/
+  SYNTAX = /(#{Liquid::VARIABLE_SIGNATURE}+)/.freeze
 
   def initialize(tag_name, markup, options)
     super
 
-    if markup =~ Syntax
+    if markup =~ SYNTAX
       @variable_name = Regexp.last_match(1)
-      @attributes    = {}
+      @attributes = {}
     else
       raise SyntaxError, "Syntax Error in 'comment_form' - Valid syntax: comment_form [article]"
     end

performance/shopify/database.rb

@@ -21,7 +21,9 @@ module Database
       db = db.each_with_object({}) do |(key, values), assigns|
         assigns[key] = values.each_with_object({}) do |v, h|
           h[v['handle']] = v
+          h
         end
+        assigns
       end
 
       # Some standard direct accessors so that the specialized templates

performance/shopify/json_filter.rb

@@ -4,6 +4,6 @@ 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/money_filter.rb

@@ -3,12 +3,14 @@
 module MoneyFilter
   def money_with_currency(money)
     return '' if money.nil?
-    format("$ %.2f USD", money / 100.0)
+
+    format('$ %.2f USD', money / 100.0)
   end
 
   def money(money)
     return '' if money.nil?
-    format("$ %.2f", money / 100.0)
+
+    format('$ %.2f', money / 100.0)
   end
 
   private

performance/shopify/paginate.rb

@@ -1,21 +1,21 @@
 # frozen_string_literal: true
 
 class Paginate < Liquid::Block
-  Syntax = /(#{Liquid::QuotedFragment})\s*(by\s*(\d+))?/
+  SYNTAX = /(#{Liquid::QUOTED_FRAGMENT})\s*(by\s*(\d+))?/.freeze
 
   def initialize(tag_name, markup, options)
     super
 
-    if markup =~ Syntax
+    if markup =~ SYNTAX
       @collection_name = Regexp.last_match(1)
-      @page_size       = if Regexp.last_match(2)
+      @page_size = if Regexp.last_match(2)
         Regexp.last_match(3).to_i
       else
         20
       end
 
       @attributes = { 'window_size' => 3 }
-      markup.scan(Liquid::TagAttributes) do |key, value|
+      markup.scan(Liquid::TAG_ATTRIBUTES) do |key, value|
         @attributes[key] = value
       end
     else
@@ -45,7 +45,7 @@ class Paginate < Liquid::Block
 
       pagination['items']      = collection_size
       pagination['pages']      = page_count - 1
-      pagination['previous']   = link('&laquo; Previous', current_page - 1)  unless 1 >= current_page
+      pagination['previous']   = link('&laquo; Previous', current_page - 1)  unless current_page <= 1
       pagination['next']       = link('Next &raquo;', current_page + 1)      unless page_count <= current_page + 1
       pagination['parts']      = []
 
@@ -61,6 +61,7 @@ class Paginate < Liquid::Block
             pagination['parts'] << link(page, page)
           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
             next
@@ -87,6 +88,6 @@ class Paginate < Liquid::Block
   end
 
   def current_url
-    "/collections/frontpage"
+    '/collections/frontpage'
   end
 end

performance/shopify/shop_filter.rb

@@ -17,21 +17,21 @@ 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 = "")
+  def link_to(link, url, title = '')
     %(<a href="#{url}" title="#{title}">#{link}</a>)
   end
 
-  def img_tag(url, alt = "")
+  def img_tag(url, alt = '')
     %(<img src="#{url}" alt="#{alt}" />)
   end
 
   def link_to_vendor(vendor)
     if vendor
-      link_to(vendor, url_for_vendor(vendor), vendor)
+      link_to vendor, url_for_vendor(vendor), vendor
     else
       'Unknown Vendor'
     end
@@ -39,7 +39,7 @@ module ShopFilter
 
   def link_to_type(type)
     if type
-      link_to(type, url_for_type(type), type)
+      link_to type, url_for_type(type), type
     else
       'Unknown Vendor'
     end
@@ -54,9 +54,7 @@ module ShopFilter
   end
 
   def product_img_url(url, style = 'small')
-    unless url =~ %r{\Aproducts/([\w\-\_]+)\.(\w{2,4})}
-      raise ArgumentError, 'filter "size" can only be called on product images'
-    end
+    raise ArgumentError, 'filter "size" can only be called on product images' unless url =~ %r{\Aproducts/([\w\-\_]+)\.(\w{2,4})}
 
     case style
     when 'original'

performance/shopify/weight_filter.rb

@@ -2,7 +2,7 @@
 
 module WeightFilter
   def weight(grams)
-    format("%.2f", grams / 1000)
+    format('%.2f', grams / 1000)
   end
 
   def weight_with_unit(grams)

performance/theme_runner.rb

@@ -58,9 +58,9 @@ class ThemeRunner
   # `render` is called to benchmark just the render portion of liquid
   def render
     @compiled_tests.each do |test|
-      tmpl    = test[:tmpl]
+      tmpl = test[:tmpl]
       assigns = test[:assigns]
-      layout  = test[:layout]
+      layout = test[:layout]
 
       if layout
         assigns['content_for_layout'] = tmpl.render!(assigns)
@@ -74,7 +74,7 @@ class ThemeRunner
   private
 
   def compile_and_render(template, layout, assigns, page_template, template_file)
-    compiled_test                 = compile_test(template, layout, assigns, page_template, template_file)
+    compiled_test = compile_test(template, layout, assigns, page_template, template_file)
     assigns['content_for_layout'] = compiled_test[:tmpl].render!(assigns)
     compiled_test[:layout].render!(assigns) if layout
   end
@@ -88,7 +88,7 @@ class ThemeRunner
   end
 
   def compile_test(template, layout, assigns, page_template, template_file)
-    tmpl            = init_template(page_template, template_file)
+    tmpl = init_template(page_template, template_file)
     parsed_template = tmpl.parse(template).dup
 
     if layout
@@ -113,9 +113,9 @@ class ThemeRunner
 
   # set up a new Liquid::Template object for use in `compile_and_render` and `compile_test`
   def init_template(page_template, template_file)
-    tmpl                         = Liquid::Template.new
-    tmpl.assigns['page_title']   = 'Page title'
-    tmpl.assigns['template']     = page_template
+    tmpl = Liquid::Template.new
+    tmpl.assigns['page_title'] = 'Page title'
+    tmpl.assigns['template'] = page_template
     tmpl.registers[:file_system] = ThemeRunner::FileSystem.new(File.dirname(template_file))
     tmpl
   end

test/integration/assign_test.rb

@@ -10,31 +10,31 @@ class AssignTest < Minitest::Test
     {% 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)
+    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

@@ -33,77 +33,77 @@ class BlankTest < Minitest::Test
 
   def test_new_tags_are_not_blank_by_default
     with_custom_tag('foobar', FoobarTag) do
-      assert_template_result(" " * N, wrap_in_for("{% foobar %}"))
+      assert_template_result(' ' * N, wrap_in_for('{% foobar %}'))
     end
   end
 
   def test_loops_are_blank
-    assert_template_result("", wrap_in_for(" "))
+    assert_template_result('', wrap_in_for(' '))
   end
 
   def test_if_else_are_blank
-    assert_template_result("", "{% if true %} {% elsif false %} {% else %} {% endif %}")
+    assert_template_result('', '{% if true %} {% elsif false %} {% else %} {% endif %}')
   end
 
   def test_unless_is_blank
-    assert_template_result("", wrap("{% unless true %} {% endunless %}"))
+    assert_template_result('', wrap('{% unless true %} {% endunless %}'))
   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
-    assert_template_result("", wrap(" {% comment %} whatever {% endcomment %} "))
+    assert_template_result('', wrap(' {% comment %} whatever {% endcomment %} '))
   end
 
   def test_captures_are_blank
-    assert_template_result("", wrap(" {% capture foo %} whatever {% endcapture %} "))
+    assert_template_result('', wrap(' {% capture foo %} whatever {% endcapture %} '))
   end
 
   def test_nested_blocks_are_blank_but_only_if_all_children_are
-    assert_template_result("", wrap(wrap(" ")))
+    assert_template_result('', wrap(wrap(' ')))
     assert_template_result("\n       but this is not " * (N + 1),
-      wrap('{% if true %} {% comment %} this is blank {% endcomment %} {% endif %}
+                           wrap('{% if true %} {% comment %} this is blank {% endcomment %} {% endif %}
       {% if true %} but this is not {% endif %}'))
   end
 
   def test_assigns_are_blank
-    assert_template_result("", wrap(' {% assign foo = "bar" %} '))
+    assert_template_result('', wrap(' {% assign foo = "bar" %} '))
   end
 
   def test_whitespace_is_blank
-    assert_template_result("", wrap(" "))
-    assert_template_result("", wrap("\t"))
+    assert_template_result('', wrap(' '))
+    assert_template_result('', wrap("\t"))
   end
 
   def test_whitespace_is_not_blank_if_other_stuff_is_present
-    body = "     x "
+    body = '     x '
     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('', 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 %} "))
   end
 end

test/integration/block_test.rb

@@ -7,8 +7,8 @@ class BlockTest < Minitest::Test
 
   def test_unexpected_end_tag
     exc = assert_raises(SyntaxError) do
-      Template.parse("{% if true %}{% endunless %}")
+      Template.parse('{% if true %}{% endunless %}')
     end
-    assert_equal(exc.message, "Liquid syntax error: 'endunless' is not a valid delimiter for if tags. use endif")
+    assert_equal exc.message, "Liquid syntax error: 'endunless' is not a valid delimiter for if tags. use endif"
   end
 end

test/integration/capture_test.rb

@@ -6,7 +6,7 @@ class CaptureTest < Minitest::Test
   include Liquid
 
   def test_captures_block_content_in_variable
-    assert_template_result("test string", "{% capture 'var' %}test string{% endcapture %}{{var}}", {})
+    assert_template_result('test string', "{% capture 'var' %}test string{% endcapture %}{{var}}", {})
   end
 
   def test_capture_with_hyphen_in_variable_name
@@ -14,9 +14,9 @@ class CaptureTest < Minitest::Test
     {% 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)
+    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
@@ -30,9 +30,9 @@ class CaptureTest < Minitest::Test
     {% endif %}
     {{var}}
     END_TEMPLATE
-    template        = Template.parse(template_source)
-    rendered        = template.render!
-    assert_equal("test-string", rendered.gsub(/\s/, ''))
+    template = Template.parse(template_source)
+    rendered = template.render!
+    assert_equal 'test-string', rendered.gsub(/\s/, '')
   end
 
   def test_assigning_from_capture
@@ -45,8 +45,8 @@ class CaptureTest < Minitest::Test
     {% endfor %}
     {{ first }}-{{ second }}
     END_TEMPLATE
-    template        = Template.parse(template_source)
-    rendered        = template.render!
-    assert_equal("3-3", rendered.gsub(/\s/, ''))
+    template = Template.parse(template_source)
+    rendered = template.render!
+    assert_equal '3-3', rendered.gsub(/\s/, '')
   end
 end # CaptureTest

test/integration/document_test.rb

@@ -7,15 +7,15 @@ class DocumentTest < Minitest::Test
 
   def test_unexpected_outer_tag
     exc = assert_raises(SyntaxError) do
-      Template.parse("{% else %}")
+      Template.parse('{% else %}')
     end
-    assert_equal(exc.message, "Liquid syntax error: Unexpected outer 'else' tag")
+    assert_equal exc.message, "Liquid syntax error: Unexpected outer 'else' tag"
   end
 
   def test_unknown_tag
     exc = assert_raises(SyntaxError) do
-      Template.parse("{% foo %}")
+      Template.parse('{% foo %}')
     end
-    assert_equal(exc.message, "Liquid syntax error: Unknown tag 'foo'")
+    assert_equal exc.message, "Liquid syntax error: Unknown tag 'foo'"
   end
 end

test/integration/drop_test.rb

@@ -23,7 +23,7 @@ end
 class ProductDrop < Liquid::Drop
   class TextDrop < Liquid::Drop
     def array
-      ['text1', 'text2']
+      %w[text1 text2]
     end
 
     def text
@@ -33,7 +33,7 @@ class ProductDrop < Liquid::Drop
 
   class CatchallDrop < Liquid::Drop
     def liquid_method_missing(method)
-      "catchall_method: #{method}"
+      +'catchall_method: ' << method.to_s
     end
   end
 
@@ -50,13 +50,13 @@ class ProductDrop < Liquid::Drop
   end
 
   def user_input
-    (+"foo").taint
+    (+'foo').taint
   end
 
   protected
 
   def callmenot
-    "protected"
+    'protected'
   end
 end
 
@@ -111,7 +111,7 @@ class DropsTest < Minitest::Test
 
   def test_product_drop
     tpl = Liquid::Template.parse('  ')
-    assert_equal('  ', tpl.render!('product' => ProductDrop.new))
+    assert_equal '  ', tpl.render!('product' => ProductDrop.new)
   end
 
   def test_rendering_raises_on_tainted_attr
@@ -125,7 +125,7 @@ class DropsTest < Minitest::Test
 
   def test_rendering_warns_on_tainted_attr
     with_taint_mode(:warn) do
-      tpl     = Liquid::Template.parse('{{ product.user_input }}')
+      tpl = Liquid::Template.parse('{{ product.user_input }}')
       context = Context.new('product' => ProductDrop.new)
       tpl.render!(context)
       assert_equal [Liquid::TaintedError], context.warnings.map(&:class)
@@ -141,105 +141,100 @@ class DropsTest < Minitest::Test
   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))
-    assert_equal("", Liquid::Template.parse("{{ product.whatever }}").render!('product' => ProductDrop.new))
-    assert_equal("", Liquid::Template.parse('{{ product | map: "inspect" }}').render!('product' => ProductDrop.new))
-    assert_equal("", Liquid::Template.parse('{{ product | map: "pretty_inspect" }}').render!('product' => ProductDrop.new))
-    assert_equal("", Liquid::Template.parse('{{ product | map: "whatever" }}').render!('product' => ProductDrop.new))
+    assert_equal '', Liquid::Template.parse('{{ product.inspect }}').render!('product' => ProductDrop.new)
+    assert_equal '', Liquid::Template.parse('{{ product.pretty_inspect }}').render!('product' => ProductDrop.new)
+    assert_equal '', Liquid::Template.parse('{{ product.whatever }}').render!('product' => ProductDrop.new)
+    assert_equal '', Liquid::Template.parse('{{ product | map: "inspect" }}').render!('product' => ProductDrop.new)
+    assert_equal '', Liquid::Template.parse('{{ product | map: "pretty_inspect" }}').render!('product' => ProductDrop.new)
+    assert_equal '', Liquid::Template.parse('{{ product | map: "whatever" }}').render!('product' => ProductDrop.new)
   end
 
   def test_drops_respond_to_to_liquid
-    assert_equal("text1", Liquid::Template.parse("{{ product.to_liquid.texts.text }}").render!('product' => ProductDrop.new))
-    assert_equal("text1", Liquid::Template.parse('{{ product | map: "to_liquid" | map: "texts" | map: "text" }}').render!('product' => ProductDrop.new))
+    assert_equal 'text1', Liquid::Template.parse('{{ product.to_liquid.texts.text }}').render!('product' => ProductDrop.new)
+    assert_equal 'text1', Liquid::Template.parse('{{ product | map: "to_liquid" | map: "texts" | map: "text" }}').render!('product' => ProductDrop.new)
   end
 
   def test_text_drop
     output = Liquid::Template.parse(' {{ product.texts.text }} ').render!('product' => ProductDrop.new)
-    assert_equal(' text1 ', output)
+    assert_equal ' text1 ', output
   end
 
   def test_catchall_unknown_method
     output = Liquid::Template.parse(' {{ product.catchall.unknown }} ').render!('product' => ProductDrop.new)
-    assert_equal(' catchall_method: unknown ', output)
+    assert_equal ' catchall_method: unknown ', output
   end
 
   def test_catchall_integer_argument_drop
     output = Liquid::Template.parse(' {{ product.catchall[8] }} ').render!('product' => ProductDrop.new)
-    assert_equal(' catchall_method: 8 ', output)
+    assert_equal ' catchall_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)
-    assert_equal(' text1  text2 ', output)
+    assert_equal ' text1  text2 ', output
   end
 
   def test_context_drop
-    output = Liquid::Template.parse(' {{ context.bar }} ').render!('context' => ContextDrop.new, 'bar' => "carrot")
-    assert_equal(' carrot ', output)
-  end
-
-  def test_context_drop_array_with_map
-    output = Liquid::Template.parse(' {{ contexts | map: "bar" }} ').render!('contexts' => [ContextDrop.new, ContextDrop.new], 'bar' => "carrot")
-    assert_equal(' carrotcarrot ', output)
+    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")
-    assert_equal(' monkey ', output)
+    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)
-    assert_equal('  ', output)
+    assert_equal '  ', output
   end
 
   def test_object_methods_not_allowed
-    [:dup, :clone, :singleton_class, :eval, :class_eval, :inspect].each do |method|
+    %i[dup clone singleton_class eval class_eval inspect].each do |method|
       output = Liquid::Template.parse(" {{ product.#{method} }} ").render!('product' => ProductDrop.new)
       assert_equal '  ', output
     end
   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 { |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]))
+    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_liquid_method_missing_for_clashing_method_names
-    ["select", "each", "map", "cycle"].each do |method|
+    %w[select each map cycle].each do |method|
       assert_equal method.to_s, Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
       assert_equal method.to_s, Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
       assert_equal method.to_s, Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
@@ -248,40 +243,33 @@ class DropsTest < Minitest::Test
   end
 
   def test_some_enumerable_methods_still_get_invoked
-    [:count, :max].each do |method|
-      assert_equal "3", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
-      assert_equal "3", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
-      assert_equal "3", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
-      assert_equal "3", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
+    %i[count max].each do |method|
+      assert_equal '3', Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal '3', Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal '3', Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
+      assert_equal '3', Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
     end
 
-    assert_equal("yes", Liquid::Template.parse("{% if collection contains 3 %}yes{% endif %}").render!('collection' => RealEnumerableDrop.new))
+    assert_equal 'yes', Liquid::Template.parse('{% if collection contains 3 %}yes{% endif %}').render!('collection' => RealEnumerableDrop.new)
 
-    [:min, :first].each do |method|
-      assert_equal "1", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
-      assert_equal "1", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
-      assert_equal "1", Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
-      assert_equal "1", Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
+    %i[min first].each do |method|
+      assert_equal '1', Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal '1', Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => RealEnumerableDrop.new)
+      assert_equal '1', Liquid::Template.parse("{{collection.#{method}}}").render!('collection' => EnumerableDrop.new)
+      assert_equal '1', Liquid::Template.parse("{{collection[\"#{method}\"]}}").render!('collection' => EnumerableDrop.new)
     end
   end
 
   def test_empty_string_value_access
-    assert_equal('', Liquid::Template.parse('{{ product[value] }}').render!('product' => ProductDrop.new, 'value' => ''))
+    assert_equal '', Liquid::Template.parse('{{ product[value] }}').render!('product' => ProductDrop.new, 'value' => '')
   end
 
   def test_nil_value_access
-    assert_equal('', Liquid::Template.parse('{{ product[value] }}').render!('product' => ProductDrop.new, 'value' => nil))
+    assert_equal '', Liquid::Template.parse('{{ product[value] }}').render!('product' => ProductDrop.new, 'value' => nil)
   end
 
   def test_default_to_s_on_drops
-    assert_equal('ProductDrop', Liquid::Template.parse("{{ product }}").render!('product' => ProductDrop.new))
-    assert_equal('EnumerableDrop', Liquid::Template.parse('{{ collection }}').render!('collection' => EnumerableDrop.new))
-  end
-
-  def test_invokable_methods
-    assert_equal(%w(to_liquid catchall user_input context texts).to_set, ProductDrop.invokable_methods)
-    assert_equal(%w(to_liquid scopes_as_array loop_pos scopes).to_set, ContextDrop.invokable_methods)
-    assert_equal(%w(to_liquid size max min first count).to_set, EnumerableDrop.invokable_methods)
-    assert_equal(%w(to_liquid max min sort count first).to_set, RealEnumerableDrop.invokable_methods)
+    assert_equal 'ProductDrop', Liquid::Template.parse('{{ product }}').render!('product' => ProductDrop.new)
+    assert_equal 'EnumerableDrop', Liquid::Template.parse('{{ collection }}').render!('collection' => EnumerableDrop.new)
   end
 end # DropsTest

test/integration/error_handling_test.rb

@@ -35,31 +35,31 @@ class ErrorHandlingTest < Minitest::Test
     TEXT
 
     output = Liquid::Template.parse(template, line_numbers: true).render('errors' => ErrorDrop.new)
-    assert_equal(expected, output)
+    assert_equal expected, output
   end
 
   def test_standard_error
     template = Liquid::Template.parse(' {{ errors.standard_error }} ')
-    assert_equal(' Liquid error: standard error ', template.render('errors' => ErrorDrop.new))
+    assert_equal ' Liquid error: standard error ', template.render('errors' => ErrorDrop.new)
 
-    assert_equal(1, template.errors.size)
-    assert_equal(StandardError, template.errors.first.class)
+    assert_equal 1, template.errors.size
+    assert_equal StandardError, template.errors.first.class
   end
 
   def test_syntax
     template = Liquid::Template.parse(' {{ errors.syntax_error }} ')
-    assert_equal(' Liquid syntax error: syntax error ', template.render('errors' => ErrorDrop.new))
+    assert_equal ' Liquid syntax error: syntax error ', template.render('errors' => ErrorDrop.new)
 
-    assert_equal(1, template.errors.size)
-    assert_equal(SyntaxError, template.errors.first.class)
+    assert_equal 1, template.errors.size
+    assert_equal SyntaxError, template.errors.first.class
   end
 
   def test_argument
     template = Liquid::Template.parse(' {{ errors.argument_error }} ')
-    assert_equal(' Liquid error: argument error ', template.render('errors' => ErrorDrop.new))
+    assert_equal ' Liquid error: argument error ', template.render('errors' => ErrorDrop.new)
 
-    assert_equal(1, template.errors.size)
-    assert_equal(ArgumentError, template.errors.first.class)
+    assert_equal 1, template.errors.size
+    assert_equal ArgumentError, template.errors.first.class
   end
 
   def test_missing_endtag_parse_time_error
@@ -78,9 +78,9 @@ class ErrorHandlingTest < Minitest::Test
 
   def test_lax_unrecognized_operator
     template = Liquid::Template.parse(' {% if 1 =! 2 %}ok{% endif %} ', error_mode: :lax)
-    assert_equal(' Liquid error: Unknown operator =! ', template.render)
-    assert_equal(1, template.errors.size)
-    assert_equal(Liquid::ArgumentError, template.errors.first.class)
+    assert_equal ' Liquid error: Unknown operator =! ', template.render
+    assert_equal 1, template.errors.size
+    assert_equal Liquid::ArgumentError, template.errors.first.class
   end
 
   def test_with_line_numbers_adds_numbers_to_parser_errors
@@ -92,7 +92,7 @@ class ErrorHandlingTest < Minitest::Test
 
           bla
         ',
-        line_numbers: true)
+                             line_numbers: true)
     end
 
     assert_match(/Liquid syntax error \(line 4\)/, err.message)
@@ -107,7 +107,7 @@ class ErrorHandlingTest < Minitest::Test
 
           bla
         ',
-        line_numbers: true)
+                             line_numbers: true)
     end
 
     assert_match(/Liquid syntax error \(line 4\)/, err.message)
@@ -121,11 +121,11 @@ class ErrorHandlingTest < Minitest::Test
 
         bla
             ',
-      error_mode: :warn,
-      line_numbers: true)
+                                      error_mode: :warn,
+                                      line_numbers: true)
 
-    assert_equal(['Liquid syntax error (line 4): Unexpected character = in "1 =! 2"'],
-      template.warnings.map(&:message))
+    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
@@ -137,11 +137,11 @@ class ErrorHandlingTest < Minitest::Test
 
           bla
                 ',
-        error_mode: :strict,
-        line_numbers: true)
+                             error_mode: :strict,
+                             line_numbers: true)
     end
 
-    assert_equal('Liquid syntax error (line 4): Unexpected character = in "1 =! 2"', err.message)
+    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
@@ -155,40 +155,40 @@ class ErrorHandlingTest < Minitest::Test
 
           bla
                 ',
-        line_numbers: true)
+                             line_numbers: true)
     end
 
-    assert_equal("Liquid syntax error (line 5): Unknown tag 'foo'", err.message)
+    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)
     end
-    assert_equal('Liquid syntax error: Unexpected character = in "1 =! 2"', err.message)
+    assert_equal 'Liquid syntax error: Unexpected character = in "1 =! 2"', err.message
 
     err = assert_raises(SyntaxError) do
       Liquid::Template.parse('{{%%%}}', error_mode: :strict)
     end
-    assert_equal('Liquid syntax error: Unexpected character % in "{{%%%}}"', err.message)
+    assert_equal 'Liquid syntax error: Unexpected character % in "{{%%%}}"', err.message
   end
 
   def test_warnings
     template = Liquid::Template.parse('{% if ~~~ %}{{%%%}}{% else %}{{ hello. }}{% endif %}', error_mode: :warn)
-    assert_equal(3, template.warnings.size)
-    assert_equal('Unexpected character ~ in "~~~"', template.warnings[0].to_s(false))
-    assert_equal('Unexpected character % in "{{%%%}}"', template.warnings[1].to_s(false))
-    assert_equal('Expected id but found end_of_string in "{{ hello. }}"', template.warnings[2].to_s(false))
-    assert_equal('', template.render)
+    assert_equal 3, template.warnings.size
+    assert_equal 'Unexpected character ~ in "~~~"', template.warnings[0].to_s(false)
+    assert_equal 'Unexpected character % in "{{%%%}}"', template.warnings[1].to_s(false)
+    assert_equal 'Expected id but found end_of_string in "{{ hello. }}"', template.warnings[2].to_s(false)
+    assert_equal '', template.render
   end
 
   def test_warning_line_numbers
     template = Liquid::Template.parse("{% if ~~~ %}\n{{%%%}}{% else %}\n{{ hello. }}{% endif %}", error_mode: :warn, line_numbers: true)
-    assert_equal('Liquid syntax error (line 1): Unexpected character ~ in "~~~"', template.warnings[0].message)
-    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 'Liquid syntax error (line 1): Unexpected character ~ in "~~~"', template.warnings[0].message
+    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)
   end
 
   # Liquid should not catch Exceptions that are not subclasses of StandardError, like Interrupt and NoMemoryError
@@ -204,14 +204,14 @@ class ErrorHandlingTest < Minitest::Test
 
     output = template.render('errors' => ErrorDrop.new)
 
-    assert_equal('This is a runtime error: Liquid error (line 1): internal', output)
-    assert_equal([Liquid::InternalError], template.errors.map(&:class))
+    assert_equal 'This is a runtime error: Liquid error (line 1): internal', output
+    assert_equal [Liquid::InternalError], template.errors.map(&:class)
   end
 
   def test_setting_default_exception_renderer
     old_exception_renderer = Liquid::Template.default_exception_renderer
     exceptions = []
-    Liquid::Template.default_exception_renderer = ->(e) {
+    Liquid::Template.default_exception_renderer = lambda { |e|
       exceptions << e
       ''
     }
@@ -219,31 +219,31 @@ class ErrorHandlingTest < Minitest::Test
 
     output = template.render('errors' => ErrorDrop.new)
 
-    assert_equal('This is a runtime error: ', output)
-    assert_equal([Liquid::ArgumentError], template.errors.map(&:class))
+    assert_equal 'This is a runtime error: ', output
+    assert_equal [Liquid::ArgumentError], template.errors.map(&:class)
   ensure
     Liquid::Template.default_exception_renderer = old_exception_renderer if old_exception_renderer
   end
 
   def test_exception_renderer_exposing_non_liquid_error
-    template   = Liquid::Template.parse('This is a runtime error: {{ errors.runtime_error }}', line_numbers: true)
+    template = Liquid::Template.parse('This is a runtime error: {{ errors.runtime_error }}', line_numbers: true)
     exceptions = []
-    handler    = ->(e) {
+    handler = lambda { |e|
       exceptions << e
       e.cause
     }
 
     output = template.render({ 'errors' => ErrorDrop.new }, exception_renderer: handler)
 
-    assert_equal('This is a runtime error: runtime error', output)
-    assert_equal([Liquid::InternalError], exceptions.map(&:class))
-    assert_equal(exceptions, template.errors)
-    assert_equal('#<RuntimeError: runtime error>', exceptions.first.cause.inspect)
+    assert_equal 'This is a runtime error: runtime error', output
+    assert_equal [Liquid::InternalError], exceptions.map(&:class)
+    assert_equal exceptions, template.errors
+    assert_equal '#<RuntimeError: runtime error>', exceptions.first.cause.inspect
   end
 
   class TestFileSystem
     def read_template_file(_template_path)
-      "{{ errors.argument_error }}"
+      '{{ errors.argument_error }}'
     end
   end
 
@@ -252,13 +252,12 @@ class ErrorHandlingTest < Minitest::Test
 
     begin
       Liquid::Template.file_system = TestFileSystem.new
-
       template = Liquid::Template.parse("Argument error:\n{% include 'product' %}", line_numbers: true)
-      page     = template.render('errors' => ErrorDrop.new)
+      page = template.render('errors' => ErrorDrop.new)
     ensure
       Liquid::Template.file_system = old_file_system
     end
-    assert_equal("Argument error:\nLiquid error (product line 1): argument error", page)
-    assert_equal("product", template.errors.first.template_name)
+    assert_equal "Argument error:\nLiquid error (product line 1): argument error", page
+    assert_equal 'product', template.errors.first.template_name
   end
 end

test/integration/filter_test.rb

@@ -29,7 +29,7 @@ class FiltersTest < Minitest::Test
 
   module OverrideObjectMethodFilter
     def tap(_input)
-      "tap overridden"
+      'tap overridden'
     end
   end
 
@@ -41,13 +41,13 @@ class FiltersTest < Minitest::Test
     @context['var'] = 1000
     @context.add_filters(MoneyFilter)
 
-    assert_equal(' 1000$ ', Template.parse("{{var | money}}").render(@context))
+    assert_equal ' 1000$ ', Template.parse('{{var | money}}').render(@context)
   end
 
   def test_underscore_in_filter_name
     @context['var'] = 1000
     @context.add_filters(MoneyFilter)
-    assert_equal(' 1000$ ', Template.parse("{{var | money_with_underscore}}").render(@context))
+    assert_equal ' 1000$ ', Template.parse('{{var | money_with_underscore}}').render(@context)
   end
 
   def test_second_filter_overwrites_first
@@ -55,103 +55,103 @@ class FiltersTest < Minitest::Test
     @context.add_filters(MoneyFilter)
     @context.add_filters(CanadianMoneyFilter)
 
-    assert_equal(' 1000$ CAD ', Template.parse("{{var | money}}").render(@context))
+    assert_equal ' 1000$ CAD ', Template.parse('{{var | money}}').render(@context)
   end
 
   def test_size
     @context['var'] = 'abcd'
     @context.add_filters(MoneyFilter)
 
-    assert_equal('4', Template.parse("{{var | size}}").render(@context))
+    assert_equal '4', Template.parse('{{var | size}}').render(@context)
   end
 
   def test_join
     @context['var'] = [1, 2, 3, 4]
 
-    assert_equal("1 2 3 4", Template.parse("{{var | join}}").render(@context))
+    assert_equal '1 2 3 4', Template.parse('{{var | join}}').render(@context)
   end
 
   def test_sort
-    @context['value']   = 3
+    @context['value'] = 3
     @context['numbers'] = [2, 1, 4, 3]
-    @context['words']   = ['expected', 'as', 'alphabetic']
-    @context['arrays']  = ['flower', 'are']
-    @context['case_sensitive'] = ['sensitive', 'Expected', 'case']
+    @context['words'] = %w[expected as alphabetic]
+    @context['arrays'] = %w[flower are]
+    @context['case_sensitive'] = %w[sensitive Expected case]
 
-    assert_equal('1 2 3 4', Template.parse("{{numbers | sort | join}}").render(@context))
-    assert_equal('alphabetic as expected', Template.parse("{{words | sort | join}}").render(@context))
-    assert_equal('3', Template.parse("{{value | sort}}").render(@context))
-    assert_equal('are flower', Template.parse("{{arrays | sort | join}}").render(@context))
-    assert_equal('Expected case sensitive', Template.parse("{{case_sensitive | sort | join}}").render(@context))
+    assert_equal '1 2 3 4', Template.parse('{{numbers | sort | join}}').render(@context)
+    assert_equal 'alphabetic as expected', Template.parse('{{words | sort | join}}').render(@context)
+    assert_equal '3', Template.parse('{{value | sort}}').render(@context)
+    assert_equal 'are flower', Template.parse('{{arrays | sort | join}}').render(@context)
+    assert_equal 'Expected case sensitive', Template.parse('{{case_sensitive | sort | join}}').render(@context)
   end
 
   def test_sort_natural
-    @context['words']   = ['case', 'Assert', 'Insensitive']
-    @context['hashes']  = [{ 'a' => 'A' }, { 'a' => 'b' }, { 'a' => 'C' }]
+    @context['words'] = %w[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', Template.parse("{{words | sort_natural | join}}").render(@context))
+    assert_equal 'Assert case Insensitive', Template.parse('{{words | sort_natural | join}}').render(@context)
 
     # Test hashes
-    assert_equal('A b C', Template.parse("{{hashes | sort_natural: 'a' | map: 'a' | join}}").render(@context))
+    assert_equal 'A b C', Template.parse("{{hashes | sort_natural: 'a' | map: 'a' | join}}").render(@context)
 
     # Test objects
-    assert_equal('A b C', Template.parse("{{objects | sort_natural: 'a' | map: 'a' | join}}").render(@context))
+    assert_equal 'A b C', Template.parse("{{objects | sort_natural: 'a' | map: 'a' | join}}").render(@context)
   end
 
   def test_compact
-    @context['words']   = ['a', nil, 'b', nil, 'c']
-    @context['hashes']  = [{ 'a' => 'A' }, { 'a' => nil }, { 'a' => 'C' }]
+    @context['words'] = ['a', nil, 'b', nil, 'c']
+    @context['hashes'] = [{ 'a' => 'A' }, { 'a' => nil }, { 'a' => 'C' }]
     @context['objects'] = [TestObject.new('A'), TestObject.new(nil), TestObject.new('C')]
 
     # Test strings
-    assert_equal('a b c', Template.parse("{{words | compact | join}}").render(@context))
+    assert_equal 'a b c', Template.parse('{{words | compact | join}}').render(@context)
 
     # Test hashes
-    assert_equal('A C', Template.parse("{{hashes | compact: 'a' | map: 'a' | join}}").render(@context))
+    assert_equal 'A C', Template.parse("{{hashes | compact: 'a' | map: 'a' | join}}").render(@context)
 
     # Test objects
-    assert_equal('A C', Template.parse("{{objects | compact: 'a' | map: 'a' | join}}").render(@context))
+    assert_equal 'A C', Template.parse("{{objects | compact: 'a' | map: 'a' | join}}").render(@context)
   end
 
   def test_strip_html
-    @context['var'] = "<b>bla blub</a>"
+    @context['var'] = '<b>bla blub</a>'
 
-    assert_equal("bla blub", Template.parse("{{ var | strip_html }}").render(@context))
+    assert_equal 'bla blub', Template.parse('{{ var | strip_html }}').render(@context)
   end
 
   def test_strip_html_ignore_comments_with_html
-    @context['var'] = "<!-- split and some <ul> tag --><b>bla blub</a>"
+    @context['var'] = '<!-- split and some <ul> tag --><b>bla blub</a>'
 
-    assert_equal("bla blub", Template.parse("{{ var | strip_html }}").render(@context))
+    assert_equal 'bla blub', Template.parse('{{ var | strip_html }}').render(@context)
   end
 
   def test_capitalize
-    @context['var'] = "blub"
+    @context['var'] = 'blub'
 
-    assert_equal("Blub", Template.parse("{{ var | capitalize }}").render(@context))
+    assert_equal 'Blub', Template.parse('{{ var | capitalize }}').render(@context)
   end
 
   def test_nonexistent_filter_is_ignored
     @context['var'] = 1000
 
-    assert_equal('1000', Template.parse("{{ var | xyzzy }}").render(@context))
+    assert_equal '1000', Template.parse('{{ var | xyzzy }}').render(@context)
   end
 
   def test_filter_with_keyword_arguments
     @context['surname'] = 'john'
-    @context['input']   = 'hello %{first_name}, %{last_name}'
+    @context['input'] = 'hello %{first_name}, %{last_name}'
     @context.add_filters(SubstituteFilter)
-    output              = Template.parse(%({{ input | substitute: first_name: surname, last_name: 'doe' }})).render(@context)
-    assert_equal('hello john, doe', output)
+    output = Template.parse(%({{ input | 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]))
+    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))
+    assert_equal '1000', Template.parse('{{var | tap}}').render!('var' => 1000)
   end
 end
 
@@ -160,15 +160,15 @@ class FiltersInTemplate < Minitest::Test
 
   def test_local_global
     with_global_filter(MoneyFilter) do
-      assert_equal " 1000$ ", Template.parse("{{1000 | money}}").render!(nil, nil)
-      assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, filters: CanadianMoneyFilter)
-      assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, filters: [CanadianMoneyFilter])
+      assert_equal ' 1000$ ', Template.parse('{{1000 | money}}').render!(nil, nil)
+      assert_equal ' 1000$ CAD ', Template.parse('{{1000 | money}}').render!(nil, filters: CanadianMoneyFilter)
+      assert_equal ' 1000$ CAD ', Template.parse('{{1000 | money}}').render!(nil, filters: [CanadianMoneyFilter])
     end
   end
 
   def test_local_filter_with_deprecated_syntax
-    assert_equal(" 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, CanadianMoneyFilter))
-    assert_equal(" 1000$ CAD ", Template.parse("{{1000 | money}}").render!(nil, [CanadianMoneyFilter]))
+    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
 

test/integration/hash_ordering_test.rb

@@ -19,7 +19,7 @@ class HashOrderingTest < Minitest::Test
 
   def test_global_register_order
     with_global_filter(MoneyFilter, CanadianMoneyFilter) do
-      assert_equal " 1000$ CAD ", Template.parse("{{1000 | money}}").render(nil, nil)
+      assert_equal ' 1000$ CAD ', Template.parse('{{1000 | money}}').render(nil, nil)
     end
   end
 end

test/integration/legacy_test.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+require 'liquid/legacy'
+
+class FiltersTest < Minitest::Test
+  include Liquid
+
+  def test_constants
+    assert_equal Liquid::FilterSeparator, Liquid::FILTER_SEPARATOR
+    assert_equal Liquid::BlockBody::ContentOfVariable, Liquid::BlockBody::CONTENT_OF_VARIABLE
+  end
+end

test/integration/output_test.rb

@@ -11,11 +11,11 @@ module FunnyFilter
     "LOL: #{input}"
   end
 
-  def add_smiley(input, smiley = ":-)")
+  def add_smiley(input, smiley = ':-)')
     "#{input} #{smiley}"
   end
 
-  def add_tag(input, tag = "p", id = "foo")
+  def add_tag(input, tag = 'p', id = 'foo')
     %(<#{tag} id="#{id}">#{input}</#{tag}>)
   end
 
@@ -42,84 +42,84 @@ class OutputTest < Minitest::Test
     text = %( {{best_cars}} )
 
     expected = %( bmw )
-    assert_equal(expected, Template.parse(text).render!(@assigns))
+    assert_equal expected, Template.parse(text).render!(@assigns)
   end
 
   def test_variable_traversing_with_two_brackets
     text = %({{ site.data.menu[include.menu][include.locale] }})
-    assert_equal("it works!", Template.parse(text).render!(
-      "site" => { "data" => { "menu" => { "foo" => { "bar" => "it works!" } } } },
-      "include" => { "menu" => "foo", "locale" => "bar" }
-    ))
+    assert_equal 'it works!', Template.parse(text).render!(
+      'site' => { 'data' => { 'menu' => { 'foo' => { 'bar' => 'it works!' } } } },
+      'include' => { 'menu' => 'foo', 'locale' => 'bar' }
+    )
   end
 
   def test_variable_traversing
     text = %( {{car.bmw}} {{car.gm}} {{car.bmw}} )
 
     expected = %( good bad good )
-    assert_equal(expected, Template.parse(text).render!(@assigns))
+    assert_equal expected, Template.parse(text).render!(@assigns)
   end
 
   def test_variable_piping
-    text     = %( {{ car.gm | make_funny }} )
+    text = %( {{ car.gm | make_funny }} )
     expected = %( LOL )
 
-    assert_equal(expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter]))
+    assert_equal expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter])
   end
 
   def test_variable_piping_with_input
-    text     = %( {{ car.gm | cite_funny }} )
+    text = %( {{ car.gm | cite_funny }} )
     expected = %( LOL: bad )
 
-    assert_equal(expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter]))
+    assert_equal expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter])
   end
 
   def test_variable_piping_with_args
-    text     = %! {{ car.gm | add_smiley : ':-(' }} !
+    text = %! {{ car.gm | add_smiley : ':-(' }} !
     expected = %| bad :-( |
 
-    assert_equal(expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter]))
+    assert_equal expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter])
   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]))
+    assert_equal expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter])
   end
 
   def test_multiple_variable_piping_with_args
-    text     = %! {{ car.gm | add_smiley : ':-(' | add_smiley : ':-('}} !
+    text = %! {{ car.gm | add_smiley : ':-(' | add_smiley : ':-('}} !
     expected = %| bad :-( :-( |
 
-    assert_equal(expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter]))
+    assert_equal expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter])
   end
 
   def test_variable_piping_with_multiple_args
-    text     = %( {{ car.gm | add_tag : 'span', 'bar'}} )
+    text = %( {{ car.gm | add_tag : 'span', 'bar'}} )
     expected = %( <span id="bar">bad</span> )
 
-    assert_equal(expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter]))
+    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}} )
+    text = %( {{ car.gm | add_tag : 'span', car.bmw}} )
     expected = %( <span id="good">bad</span> )
 
-    assert_equal(expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter]))
+    assert_equal expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter])
   end
 
   def test_multiple_pipings
-    text     = %( {{ best_cars | cite_funny | paragraph }} )
+    text = %( {{ best_cars | cite_funny | paragraph }} )
     expected = %( <p>LOL: bmw</p> )
 
-    assert_equal(expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter]))
+    assert_equal expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter])
   end
 
   def test_link_to
-    text     = %( {{ 'Typo' | link_to: 'http://typo.leetsoft.com' }} )
+    text = %( {{ 'Typo' | link_to: 'http://typo.leetsoft.com' }} )
     expected = %( <a href="http://typo.leetsoft.com">Typo</a> )
 
-    assert_equal(expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter]))
+    assert_equal expected, Template.parse(text).render!(@assigns, filters: [FunnyFilter])
   end
 end # OutputTest

test/integration/parse_tree_visitor_test.rb

@@ -7,217 +7,217 @@ class ParseTreeVisitorTest < Minitest::Test
 
   def test_variable
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({{ test }}))
     )
   end
 
   def test_varible_with_filter
     assert_equal(
-      ["test", "infilter"],
+      %w[test infilter],
       visit(%({{ test | split: infilter }}))
     )
   end
 
   def test_dynamic_variable
     assert_equal(
-      ["test", "inlookup"],
+      %w[test inlookup],
       visit(%({{ test[inlookup] }}))
     )
   end
 
   def test_if_condition
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% if test %}{% endif %}))
     )
   end
 
   def test_complex_if_condition
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% if 1 == 1 and 2 == test %}{% endif %}))
     )
   end
 
   def test_if_body
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% if 1 == 1 %}{{ test }}{% endif %}))
     )
   end
 
   def test_unless_condition
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% unless test %}{% endunless %}))
     )
   end
 
   def test_complex_unless_condition
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% unless 1 == 1 and 2 == test %}{% endunless %}))
     )
   end
 
   def test_unless_body
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% unless 1 == 1 %}{{ test }}{% endunless %}))
     )
   end
 
   def test_elsif_condition
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% if 1 == 1 %}{% elsif test %}{% endif %}))
     )
   end
 
   def test_complex_elsif_condition
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% if 1 == 1 %}{% elsif 1 == 1 and 2 == test %}{% endif %}))
     )
   end
 
   def test_elsif_body
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% if 1 == 1 %}{% elsif 2 == 2 %}{{ test }}{% endif %}))
     )
   end
 
   def test_else_body
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% if 1 == 1 %}{% else %}{{ test }}{% endif %}))
     )
   end
 
   def test_case_left
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% case test %}{% endcase %}))
     )
   end
 
   def test_case_condition
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% case 1 %}{% when test %}{% endcase %}))
     )
   end
 
   def test_case_when_body
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% case 1 %}{% when 2 %}{{ test }}{% endcase %}))
     )
   end
 
   def test_case_else_body
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% case 1 %}{% else %}{{ test }}{% endcase %}))
     )
   end
 
   def test_for_in
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% for x in test %}{% endfor %}))
     )
   end
 
   def test_for_limit
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% for x in (1..5) limit: test %}{% endfor %}))
     )
   end
 
   def test_for_offset
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% for x in (1..5) offset: test %}{% endfor %}))
     )
   end
 
   def test_for_body
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% for x in (1..5) %}{{ test }}{% endfor %}))
     )
   end
 
   def test_tablerow_in
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% tablerow x in test %}{% endtablerow %}))
     )
   end
 
   def test_tablerow_limit
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% tablerow x in (1..5) limit: test %}{% endtablerow %}))
     )
   end
 
   def test_tablerow_offset
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% tablerow x in (1..5) offset: test %}{% endtablerow %}))
     )
   end
 
   def test_tablerow_body
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% tablerow x in (1..5) %}{{ test }}{% endtablerow %}))
     )
   end
 
   def test_cycle
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% cycle test %}))
     )
   end
 
   def test_assign
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% assign x = test %}))
     )
   end
 
   def test_capture
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% capture x %}{{ test }}{% endcapture %}))
     )
   end
 
   def test_include
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% include test %}))
     )
   end
 
   def test_include_with
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% include "hai" with test %}))
     )
   end
 
   def test_include_for
     assert_equal(
-      ["test"],
+      ['test'],
       visit(%({% include "hai" for test %}))
     )
   end
@@ -225,9 +225,9 @@ class ParseTreeVisitorTest < Minitest::Test
   def test_preserve_tree_structure
     assert_equal(
       [[nil, [
-        [nil, [[nil, [["other", []]]]]],
-        ["test", []],
-        ["xs", []],
+        [nil, [[nil, [['other', []]]]]],
+        ['test', []],
+        ['xs', []],
       ]]],
       traversal(%({% for x in xs offset: test %}{{ other }}{% endfor %})).visit
     )

test/integration/parsing_quirks_test.rb

@@ -6,38 +6,38 @@ class ParsingQuirksTest < Minitest::Test
   include Liquid
 
   def test_parsing_css
-    text = " div { font-weight: bold; } "
-    assert_equal(text, Template.parse(text).render!)
+    text = ' div { font-weight: bold; } '
+    assert_equal text, Template.parse(text).render!
   end
 
   def test_raise_on_single_close_bracet
     assert_raises(SyntaxError) do
-      Template.parse("text {{method} oh nos!")
+      Template.parse('text {{method} oh nos!')
     end
   end
 
   def test_raise_on_label_and_no_close_bracets
     assert_raises(SyntaxError) do
-      Template.parse("TEST {{ ")
+      Template.parse('TEST {{ ')
     end
   end
 
   def test_raise_on_label_and_no_close_bracets_percent
     assert_raises(SyntaxError) do
-      Template.parse("TEST {% ")
+      Template.parse('TEST {% ')
     end
   end
 
   def test_error_on_empty_filter
-    assert(Template.parse("{{test}}"))
+    assert Template.parse('{{test}}')
 
     with_error_mode(:lax) do
-      assert Template.parse("{{|test}}")
+      assert Template.parse('{{|test}}')
     end
 
     with_error_mode(:strict) do
-      assert_raises(SyntaxError) { Template.parse("{{|test}}") }
-      assert_raises(SyntaxError) { Template.parse("{{test |a|b|}}") }
+      assert_raises(SyntaxError) { Template.parse('{{|test}}') }
+      assert_raises(SyntaxError) { Template.parse('{{test |a|b|}}') }
     end
   end
 
@@ -53,35 +53,35 @@ class ParsingQuirksTest < Minitest::Test
   def test_unexpected_characters_syntax_error
     with_error_mode(:strict) do
       assert_raises(SyntaxError) do
-        markup = "true && false"
+        markup = 'true && false'
         Template.parse("{% if #{markup} %} YES {% endif %}")
       end
       assert_raises(SyntaxError) do
-        markup = "false || true"
+        markup = 'false || true'
         Template.parse("{% if #{markup} %} YES {% endif %}")
       end
     end
   end
 
   def test_no_error_on_lax_empty_filter
-    assert(Template.parse("{{test |a|b|}}", error_mode: :lax))
-    assert(Template.parse("{{test}}", error_mode: :lax))
-    assert(Template.parse("{{|test|}}", error_mode: :lax))
+    assert Template.parse('{{test |a|b|}}', error_mode: :lax)
+    assert Template.parse('{{test}}', error_mode: :lax)
+    assert Template.parse('{{|test|}}', error_mode: :lax)
   end
 
   def test_meaningless_parens_lax
     with_error_mode(:lax) do
       assigns = { 'b' => 'bar', 'c' => 'baz' }
-      markup  = "a == 'foo' or (b == 'bar' and c == 'baz') or false"
+      markup = "a == 'foo' or (b == 'bar' and c == 'baz') or false"
       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"
+      markup = 'true && false'
       assert_template_result(' YES ', "{% if #{markup} %} YES {% endif %}")
-      markup = "false || true"
+      markup = 'false || true'
       assert_template_result('', "{% if #{markup} %} YES {% endif %}")
     end
   end
@@ -114,7 +114,7 @@ class ParsingQuirksTest < Minitest::Test
 
   def test_extra_dots_in_ranges
     with_error_mode(:lax) do
-      assert_template_result('12345', "{% for i in (1...5) %}{{ i }}{% endfor %}")
+      assert_template_result('12345', '{% for i in (1...5) %}{{ i }}{% endfor %}')
     end
   end
 

test/integration/registers/disabled_tags_test.rb

@@ -1,27 +0,0 @@
-# frozen_string_literal: true
-
-require 'test_helper'
-
-class DisabledTagsTest < Minitest::Test
-  include Liquid
-
-  class DisableRaw < Block
-    disable_tags "raw"
-  end
-
-  class DisableRawEcho < Block
-    disable_tags "raw", "echo"
-  end
-
-  def test_disables_raw
-    with_custom_tag('disable', DisableRaw) do
-      assert_template_result 'raw usage is not allowed in this contextfoo', '{% disable %}{% raw %}Foobar{% endraw %}{% echo "foo" %}{% enddisable %}'
-    end
-  end
-
-  def test_disables_echo_and_raw
-    with_custom_tag('disable', DisableRawEcho) do
-      assert_template_result 'raw usage is not allowed in this contextecho usage is not allowed in this context', '{% disable %}{% raw %}Foobar{% endraw %}{% echo "foo" %}{% enddisable %}'
-    end
-  end
-end

test/integration/render_profiling_test.rb

@@ -19,35 +19,35 @@ class RenderProfilingTest < Minitest::Test
     t = Template.parse("{{ 'a string' | upcase }}")
     t.render!
 
-    assert_nil(t.profiler)
+    assert_nil t.profiler
   end
 
   def test_parse_makes_available_simple_profiling
     t = Template.parse("{{ 'a string' | upcase }}", profile: true)
     t.render!
 
-    assert_equal(1, t.profiler.length)
+    assert_equal 1, t.profiler.length
 
     node = t.profiler[0]
-    assert_equal(" 'a string' | upcase ", node.code)
+    assert_equal " 'a string' | upcase ", node.code
   end
 
   def test_render_ignores_raw_strings_when_profiling
     t = Template.parse("This is raw string\nstuff\nNewline", profile: true)
     t.render!
 
-    assert_equal(0, t.profiler.length)
+    assert_equal 0, t.profiler.length
   end
 
   def test_profiling_includes_line_numbers_of_liquid_nodes
     t = Template.parse("{{ 'a string' | upcase }}\n{% increment test %}", profile: true)
     t.render!
-    assert_equal(2, t.profiler.length)
+    assert_equal 2, t.profiler.length
 
     # {{ 'a string' | upcase }}
-    assert_equal(1, t.profiler[0].line_number)
+    assert_equal 1, t.profiler[0].line_number
     # {{ increment test }}
-    assert_equal(2, t.profiler[1].line_number)
+    assert_equal 2, t.profiler[1].line_number
   end
 
   def test_profiling_includes_line_numbers_of_included_partials
@@ -57,9 +57,9 @@ class RenderProfilingTest < Minitest::Test
     included_children = t.profiler[0].children
 
     # {% assign template_name = 'a_template' %}
-    assert_equal(1, included_children[0].line_number)
+    assert_equal 1, included_children[0].line_number
     # {{ template_name }}
-    assert_equal(2, included_children[1].line_number)
+    assert_equal 2, included_children[1].line_number
   end
 
   def test_profiling_times_the_rendering_of_tokens
@@ -67,14 +67,14 @@ class RenderProfilingTest < Minitest::Test
     t.render!
 
     node = t.profiler[0]
-    refute_nil(node.render_time)
+    refute_nil node.render_time
   end
 
   def test_profiling_times_the_entire_render
     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
@@ -82,7 +82,7 @@ class RenderProfilingTest < Minitest::Test
     t.render!
 
     include_node = t.profiler[1]
-    assert_equal(2, include_node.children.length)
+    assert_equal 2, include_node.children.length
   end
 
   def test_profiling_marks_children_with_the_name_of_included_partial
@@ -91,7 +91,7 @@ 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
 
@@ -101,12 +101,12 @@ 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
 
@@ -116,12 +116,12 @@ 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
 
@@ -134,38 +134,23 @@ class RenderProfilingTest < Minitest::Test
       timing_count += 1
     end
 
-    assert_equal(2, timing_count)
+    assert_equal 2, timing_count
   end
 
   def test_profiling_marks_children_of_if_blocks
-    t = Template.parse("{% if true %} {% increment test %} {{ test }} {% endif %}", profile: true)
+    t = Template.parse('{% if true %} {% increment test %} {{ test }} {% endif %}', profile: true)
     t.render!
 
-    assert_equal(1, t.profiler.length)
-    assert_equal(2, t.profiler[0].children.length)
+    assert_equal 1, t.profiler.length
+    assert_equal 2, t.profiler[0].children.length
   end
 
   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 = Template.parse('{% for item in collection %} {{ item }} {% endfor %}', profile: true)
+    t.render!('collection' => %w[one two])
 
-    assert_equal(1, t.profiler.length)
+    assert_equal 1, t.profiler.length
     # Will profile each invocation of the for block
-    assert_equal(2, t.profiler[0].children.length)
-  end
-
-  def test_profiling_supports_self_time
-    t = Template.parse("{% for item in collection %} {{ item }} {% endfor %}", profile: true)
-    t.render!("collection" => ["one", "two"])
-    leaf = t.profiler[0].children[0]
-
-    assert_operator leaf.self_time, :>, 0
-  end
-
-  def test_profiling_supports_total_time
-    t = Template.parse("{% if true %} {% increment test %} {{ test }} {% endif %}", profile: true)
-    t.render!
-
-    assert_operator t.profiler[0].total_time, :>, 0
+    assert_equal 2, t.profiler[0].children.length
   end
 end

test/integration/security_test.rb

@@ -16,31 +16,31 @@ class SecurityTest < Minitest::Test
   end
 
   def test_no_instance_eval
-    text     = %( {{ '1+1' | instance_eval }} )
+    text = %( {{ '1+1' | instance_eval }} )
     expected = %( 1+1 )
 
-    assert_equal(expected, Template.parse(text).render!(@assigns))
+    assert_equal expected, Template.parse(text).render!(@assigns)
   end
 
   def test_no_existing_instance_eval
-    text     = %( {{ '1+1' | __instance_eval__ }} )
+    text = %( {{ '1+1' | __instance_eval__ }} )
     expected = %( 1+1 )
 
-    assert_equal(expected, Template.parse(text).render!(@assigns))
+    assert_equal expected, Template.parse(text).render!(@assigns)
   end
 
   def test_no_instance_eval_after_mixing_in_new_filter
-    text     = %( {{ '1+1' | instance_eval }} )
+    text = %( {{ '1+1' | instance_eval }} )
     expected = %( 1+1 )
 
-    assert_equal(expected, Template.parse(text).render!(@assigns))
+    assert_equal expected, Template.parse(text).render!(@assigns)
   end
 
   def test_no_instance_eval_later_in_chain
-    text     = %( {{ '1+1' | add_one | instance_eval }} )
+    text = %( {{ '1+1' | add_one | instance_eval }} )
     expected = %( 1+1 + 1 )
 
-    assert_equal(expected, Template.parse(text).render!(@assigns, filters: SecurityFilter))
+    assert_equal expected, Template.parse(text).render!(@assigns, filters: SecurityFilter)
   end
 
   def test_does_not_add_filters_to_symbol_table
@@ -49,32 +49,32 @@ class SecurityTest < Minitest::Test
     test = %( {{ "some_string" | a_bad_filter }} )
 
     template = Template.parse(test)
-    assert_equal([], (Symbol.all_symbols - current_symbols))
+    assert_equal [], (Symbol.all_symbols - current_symbols)
 
     template.render!
-    assert_equal([], (Symbol.all_symbols - current_symbols))
+    assert_equal [], (Symbol.all_symbols - current_symbols)
   end
 
   def test_does_not_add_drop_methods_to_symbol_table
     current_symbols = Symbol.all_symbols
 
     assigns = { 'drop' => Drop.new }
-    assert_equal("", Template.parse("{{ drop.custom_method_1 }}", assigns).render!)
-    assert_equal("", Template.parse("{{ drop.custom_method_2 }}", assigns).render!)
-    assert_equal("", Template.parse("{{ drop.custom_method_3 }}", assigns).render!)
+    assert_equal '', Template.parse('{{ drop.custom_method_1 }}', assigns).render!
+    assert_equal '', Template.parse('{{ drop.custom_method_2 }}', assigns).render!
+    assert_equal '', Template.parse('{{ drop.custom_method_3 }}', assigns).render!
 
-    assert_equal([], (Symbol.all_symbols - current_symbols))
+    assert_equal [], (Symbol.all_symbols - current_symbols)
   end
 
   def test_max_depth_nested_blocks_does_not_raise_exception
     depth = Liquid::Block::MAX_DEPTH
-    code  = "{% if true %}" * depth + "rendered" + "{% endif %}" * depth
-    assert_equal("rendered", Template.parse(code).render!)
+    code = '{% if true %}' * depth + 'rendered' + '{% endif %}' * depth
+    assert_equal 'rendered', Template.parse(code).render!
   end
 
   def test_more_than_max_depth_nested_blocks_raises_exception
     depth = Liquid::Block::MAX_DEPTH + 1
-    code  = "{% if true %}" * depth + "rendered" + "{% endif %}" * depth
+    code = '{% if true %}' * depth + 'rendered' + '{% endif %}' * depth
     assert_raises(Liquid::StackLevelError) do
       Template.parse(code).render!
     end

test/integration/tags/break_tag_test.rb

@@ -8,8 +8,8 @@ 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 }
-    markup   = '{% break %}'
+    assigns = { 'i' => 1 }
+    markup = '{% break %}'
     expected = ''
 
     assert_template_result(expected, markup, assigns)

test/integration/tags/continue_tag_test.rb

@@ -8,8 +8,8 @@ class ContinueTagTest < Minitest::Test
   # tests that no weird errors are raised if continue is called outside of a
   # block
   def test_continue_with_no_block
-    assigns  = {}
-    markup   = '{% continue %}'
+    assigns = {}
+    markup = '{% continue %}'
     expected = ''
 
     assert_template_result(expected, markup, assigns)

test/integration/tags/echo_test.rb

@@ -1,13 +0,0 @@
-# frozen_string_literal: true
-
-require 'test_helper'
-
-class EchoTest < Minitest::Test
-  include Liquid
-
-  def test_echo_outputs_its_input
-    assert_template_result('BAR', <<~LIQUID, 'variable-name' => 'bar')
-      {%- echo variable-name | upcase -%}
-    LIQUID
-  end
-end

test/integration/tags/for_tag_test.rb

@@ -42,31 +42,31 @@ HERE
     assert_template_result(' 1  2  3 ', '{%for item in (1..3) %} {{item}} {%endfor%}')
 
     assert_raises(Liquid::ArgumentError) do
-      Template.parse('{% for i in (a..2) %}{% endfor %}').render!("a" => [1, 2])
+      Template.parse('{% for i in (a..2) %}{% endfor %}').render!('a' => [1, 2])
     end
 
-    assert_template_result(' 0  1  2  3 ', '{% for item in (a..3) %} {{item}} {% endfor %}', "a" => "invalid integer")
+    assert_template_result(' 0  1  2  3 ', '{% for item in (a..3) %} {{item}} {% endfor %}', 'a' => 'invalid integer')
   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)
+    foobar = { 'value' => 3 }
+    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('abcd', '{%for item in array%}{{item}}{%endfor%}', 'array' => %w[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
@@ -74,8 +74,8 @@ HERE
   def test_for_helpers
     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)
@@ -87,8 +87,8 @@ HERE
   def test_for_and_if
     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
@@ -106,7 +106,7 @@ HERE
   end
 
   def test_limiting_with_invalid_limit
-    assigns  = { 'array' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] }
+    assigns = { 'array' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] }
     template = <<-MKUP
       {% for i in array limit: true offset: 1 %}
         {{ i }}
@@ -116,11 +116,11 @@ HERE
     exception = assert_raises(Liquid::ArgumentError) do
       Template.parse(template).render!(assigns)
     end
-    assert_equal("Liquid error: invalid integer", exception.message)
+    assert_equal('Liquid error: invalid integer', exception.message)
   end
 
   def test_limiting_with_invalid_offset
-    assigns  = { 'array' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] }
+    assigns = { 'array' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] }
     template = <<-MKUP
       {% for i in array limit: 1 offset: true %}
         {{ i }}
@@ -130,12 +130,12 @@ HERE
     exception = assert_raises(Liquid::ArgumentError) do
       Template.parse(template).render!(assigns)
     end
-    assert_equal("Liquid error: invalid integer", exception.message)
+    assert_equal('Liquid error: invalid integer', exception.message)
   end
 
   def test_dynamic_variable_limiting
-    assigns           = { 'array' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] }
-    assigns['limit']  = 2
+    assigns = { 'array' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] }
+    assigns['limit'] = 2
     assigns['offset'] = 2
 
     assert_template_result('34', '{%for i in array limit: limit offset: offset %}{{ i }}{%endfor%}', assigns)
@@ -152,65 +152,65 @@ HERE
   end
 
   def test_pause_resume
-    assigns  = { 'array' => { 'items' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 0] } }
-    markup   = <<-MKUP
+    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
       {%for i in array.items offset:continue limit: 3 %}{{i}}{%endfor%}
       next
       {%for i in array.items offset:continue limit: 3 %}{{i}}{%endfor%}
-      MKUP
+    MKUP
     expected = <<-XPCTD
       123
       next
       456
       next
       789
-      XPCTD
+    XPCTD
     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] } }
-    markup   = <<-MKUP
+    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
       {%for i in array.items offset:continue limit:3 %}{{i}}{%endfor%}
       next
       {%for i in array.items offset:continue limit:1 %}{{i}}{%endfor%}
-      MKUP
+    MKUP
     expected = <<-XPCTD
       123
       next
       456
       next
       7
-      XPCTD
+    XPCTD
     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] } }
-    markup   = <<-MKUP
+    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
       {%for i in array.items offset:continue limit:3 %}{{i}}{%endfor%}
       next
       {%for i in array.items offset:continue limit:1000 %}{{i}}{%endfor%}
-      MKUP
+    MKUP
     expected = <<-XPCTD
       123
       next
       456
       next
       7890
-      XPCTD
+    XPCTD
     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   = '{%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
@@ -226,26 +226,26 @@ HERE
   def test_for_with_break
     assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] } }
 
-    markup   = '{% for i in array.items %}{% break %}{% endfor %}'
-    expected = ""
+    markup = '{% for i in array.items %}{% break %}{% endfor %}'
+    expected = ''
     assert_template_result(expected, markup, assigns)
 
-    markup   = '{% for i in array.items %}{{ i }}{% break %}{% endfor %}'
-    expected = "1"
+    markup = '{% for i in array.items %}{{ i }}{% break %}{% endfor %}'
+    expected = '1'
     assert_template_result(expected, markup, assigns)
 
-    markup   = '{% for i in array.items %}{% break %}{{ i }}{% endfor %}'
-    expected = ""
+    markup = '{% for i in array.items %}{% break %}{{ i }}{% endfor %}'
+    expected = ''
     assert_template_result(expected, markup, assigns)
 
-    markup   = '{% for i in array.items %}{{ i }}{% if i > 3 %}{% break %}{% endif %}{% endfor %}'
-    expected = "1234"
+    markup = '{% for i in array.items %}{{ i }}{% if i > 3 %}{% break %}{% endif %}{% endfor %}'
+    expected = '1234'
     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 %}' \
+    assigns = { 'array' => [[1, 2], [3, 4], [5, 6]] }
+    markup = '{% for item in array %}' \
                '{% for i in item %}' \
                  '{% if i == 1 %}' \
                    '{% break %}' \
@@ -257,8 +257,8 @@ HERE
     assert_template_result(expected, markup, assigns)
 
     # test break does nothing when unreached
-    assigns  = { 'array' => { 'items' => [1, 2, 3, 4, 5] } }
-    markup   = '{% for i in array.items %}{% if i == 9999 %}{% break %}{% endif %}{{ i }}{% endfor %}'
+    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
@@ -266,29 +266,29 @@ HERE
   def test_for_with_continue
     assigns = { 'array' => { 'items' => [1, 2, 3, 4, 5] } }
 
-    markup   = '{% for i in array.items %}{% continue %}{% endfor %}'
-    expected = ""
+    markup = '{% for i in array.items %}{% continue %}{% endfor %}'
+    expected = ''
     assert_template_result(expected, markup, assigns)
 
-    markup   = '{% for i in array.items %}{{ i }}{% continue %}{% endfor %}'
-    expected = "12345"
+    markup = '{% for i in array.items %}{{ i }}{% continue %}{% endfor %}'
+    expected = '12345'
     assert_template_result(expected, markup, assigns)
 
-    markup   = '{% for i in array.items %}{% continue %}{{ i }}{% endfor %}'
-    expected = ""
+    markup = '{% for i in array.items %}{% continue %}{{ i }}{% endfor %}'
+    expected = ''
     assert_template_result(expected, markup, assigns)
 
-    markup   = '{% for i in array.items %}{% if i > 3 %}{% continue %}{% endif %}{{ i }}{% endfor %}'
-    expected = "123"
+    markup = '{% for i in array.items %}{% if i > 3 %}{% continue %}{% endif %}{{ i }}{% endfor %}'
+    expected = '123'
     assert_template_result(expected, markup, assigns)
 
-    markup   = '{% for i in array.items %}{% if i == 3 %}{% continue %}{% else %}{{ i }}{% endif %}{% endfor %}'
-    expected = "1245"
+    markup = '{% for i in array.items %}{% if i == 3 %}{% continue %}{% else %}{{ i }}{% endif %}{% endfor %}'
+    expected = '1245'
     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 %}' \
+    assigns = { 'array' => [[1, 2], [3, 4], [5, 6]] }
+    markup = '{% for item in array %}' \
                '{% for i in item %}' \
                  '{% if i == 1 %}' \
                    '{% continue %}' \
@@ -300,8 +300,8 @@ HERE
     assert_template_result(expected, markup, assigns)
 
     # test continue does nothing when unreached
-    assigns  = { 'array' => { 'items' => [1, 2, 3, 4, 5] } }
-    markup   = '{% for i in array.items %}{% if i == 9999 %}{% continue %}{% endif %}{{ i }}{% endfor %}'
+    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)
   end
@@ -312,49 +312,49 @@ 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]])
+                           '{% 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]])
+                           '{% 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 %}')
+    assert_template_result 'oo', '{% for a in (1..2) %}o{% for b in empty %}{% endfor %}{% endfor %}'
   end
 
   def test_blank_string_not_iterable
-    assert_template_result('', "{% for char in characters %}I WILL NOT BE OUTPUT{% endfor %}", 'characters' => '')
+    assert_template_result('', '{% for char in characters %}I WILL NOT BE OUTPUT{% endfor %}', 'characters' => '')
   end
 
   def test_bad_variable_naming_in_for_loop
@@ -389,41 +389,41 @@ HERE
   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)
-    assert(loader.each_called)
-    assert(!loader.load_slice_called)
+    assert loader.each_called
+    assert !loader.load_slice_called
   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)
-    assert(!loader.each_called)
-    assert(loader.load_slice_called)
+    assert !loader.each_called
+    assert loader.load_slice_called
   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)
-    assert(!loader.each_called)
-    assert(loader.load_slice_called)
+    assert !loader.each_called
+    assert loader.load_slice_called
   end
 
   def test_iterate_with_load_slice_returns_same_results_as_without
-    loader         = LoaderDrop.new([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 %}'
+    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
@@ -435,6 +435,6 @@ HERE
       Liquid::Template.parse('{% for i in (1..2) %}{{ standard_error }}{% endfor %}').render!(context)
     end
 
-    assert(context.registers[:for_stack].empty?)
+    assert context.registers[:for_stack].empty?
   end
 end

test/integration/tags/if_else_tag_test.rb

@@ -8,7 +8,7 @@ class IfElseTagTest < Minitest::Test
   def test_if
     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 %} ')
+                           ' {% 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
 
@@ -45,18 +45,18 @@ class IfElseTagTest < Minitest::Test
 
   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 }
+    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)
+    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
@@ -77,14 +77,14 @@ class IfElseTagTest < Minitest::Test
     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' => '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' => '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' => [] })
@@ -92,11 +92,11 @@ class IfElseTagTest < Minitest::Test
     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" %} 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 %} 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 })
@@ -156,7 +156,7 @@ 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
@@ -168,7 +168,7 @@ class IfElseTagTest < Minitest::Test
   end
 
   def test_multiple_conditions
-    tpl = "{% if a or b and c %}true{% else %}false{% endif %}"
+    tpl = '{% if a or b and c %}true{% else %}false{% endif %}'
 
     tests = {
       [true, true, true] => true,

test/integration/tags/include_tag_test.rb

@@ -5,38 +5,35 @@ require 'test_helper'
 class TestFileSystem
   def read_template_file(template_path)
     case template_path
-    when "product"
-      "Product: {{ product.title }} "
+    when 'product'
+      'Product: {{ product.title }} '
 
-    when "product_alias"
-      "Product: {{ product.title }} "
+    when 'locale_variables'
+      'Locale: {{echo1}} {{echo2}}'
 
-    when "locale_variables"
-      "Locale: {{echo1}} {{echo2}}"
+    when 'variant'
+      'Variant: {{ variant.title }}'
 
-    when "variant"
-      "Variant: {{ variant.title }}"
-
-    when "nested_template"
+    when 'nested_template'
       "{% include 'header' %} {% include 'body' %} {% include 'footer' %}"
 
-    when "body"
+    when 'body'
       "body {% include 'body_detail' %}"
 
-    when "nested_product_template"
+    when 'nested_product_template'
       "Product: {{ nested_product_template.title }} {%include 'details'%} "
 
-    when "recursively_nested_template"
+    when 'recursively_nested_template'
       "-{% include 'recursively_nested_template' %}"
 
-    when "pick_a_source"
-      "from TestFileSystem"
+    when 'pick_a_source'
+      'from TestFileSystem'
 
     when 'assignments'
       "{% assign foo = 'bar' %}"
 
     when 'break'
-      "{% break %}"
+      '{% break %}'
 
     else
       template_path
@@ -54,22 +51,21 @@ class CountingFileSystem
   attr_reader :count
   def read_template_file(_template_path)
     @count ||= 0
-    @count  += 1
+    @count += 1
     'from CountingFileSystem'
   end
 end
 
 class CustomInclude < Liquid::Tag
-  Syntax = /(#{Liquid::QuotedFragment}+)(\s+(?:with|for)\s+(#{Liquid::QuotedFragment}+))?/o
+  SYNTAX = /(#{Liquid::QUOTED_FRAGMENT}+)(\s+(?:with|for)\s+(#{Liquid::QUOTED_FRAGMENT}+))?/o.freeze
 
   def initialize(tag_name, markup, tokens)
-    markup =~ Syntax
+    markup =~ SYNTAX
     @template_name = Regexp.last_match(1)
     super
   end
 
-  def parse(tokens)
-  end
+  def parse(tokens); end
 
   def render_to_output_buffer(_context, output)
     output << @template_name[1..-2]
@@ -85,66 +81,56 @@ class IncludeTagTest < Minitest::Test
   end
 
   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 }))
+    assert_equal 'from OtherFileSystem',
+                 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' }])
-  end
-
-  def test_include_tag_with_alias
-    assert_template_result("Product: Draft 151cm ",
-                           "{% include 'product_alias' with products[0] as product %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
-  end
-
-  def test_include_tag_for_alias
-    assert_template_result("Product: Draft 151cm Product: Element 155cm ",
-                           "{% include 'product_alias' for products as product %}", "products" => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }])
+    assert_template_result 'Product: Draft 151cm ',
+                           "{% 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' })
+    assert_template_result 'Product: 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' }])
+    assert_template_result 'Product: Draft 151cm Product: Element 155cm ',
+                           "{% include 'product' for products %}", 'products' => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }]
   end
 
   def test_include_tag_with_local_variables
-    assert_template_result("Locale: test123 ", "{% include 'locale_variables' echo1: 'test123' %}")
+    assert_template_result 'Locale: test123 ', "{% include 'locale_variables' echo1: 'test123' %}"
   end
 
   def test_include_tag_with_multiple_local_variables
-    assert_template_result("Locale: test123 test321",
-      "{% include 'locale_variables' echo1: 'test123', echo2: 'test321' %}")
+    assert_template_result 'Locale: test123 test321',
+                           "{% include 'locale_variables' echo1: 'test123', echo2: 'test321' %}"
   end
 
   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' })
+    assert_template_result 'Locale: test123 test321',
+                           "{% include 'locale_variables' echo1: echo1, echo2: more_echos.echo2 %}",
+                           'echo1' => 'test123', 'more_echos' => { 'echo2' => 'test321' }
   end
 
   def test_included_templates_assigns_variables
-    assert_template_result("bar", "{% include 'assignments' %}{{ foo }}")
+    assert_template_result 'bar', "{% include 'assignments' %}{{ foo }}"
   end
 
   def test_nested_include_tag
-    assert_template_result("body body_detail", "{% include 'body' %}")
+    assert_template_result 'body body_detail', "{% include 'body' %}"
 
-    assert_template_result("header body body_detail footer", "{% include 'nested_template' %}")
+    assert_template_result 'header body body_detail footer', "{% include 'nested_template' %}"
   end
 
   def test_nested_include_with_variable
-    assert_template_result("Product: Draft 151cm details ",
-      "{% include 'nested_product_template' with product %}", "product" => { "title" => 'Draft 151cm' })
+    assert_template_result 'Product: Draft 151cm details ',
+                           "{% 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' }])
+    assert_template_result 'Product: Draft 151cm details Product: Element 155cm details ',
+                           "{% include 'nested_product_template' for products %}", 'products' => [{ 'title' => 'Draft 151cm' }, { 'title' => 'Element 155cm' }]
   end
 
   def test_recursively_included_template_does_not_produce_endless_loop
@@ -162,41 +148,41 @@ class IncludeTagTest < Minitest::Test
   end
 
   def test_dynamically_choosen_template
-    assert_template_result("Test123", "{% include template %}", "template" => 'Test123')
-    assert_template_result("Test321", "{% include template %}", "template" => 'Test321')
+    assert_template_result 'Test123', '{% include template %}', 'template' => 'Test123'
+    assert_template_result 'Test321', '{% include template %}', 'template' => 'Test321'
 
-    assert_template_result("Product: Draft 151cm ", "{% include template for product %}",
-      "template" => 'product', 'product' => { 'title' => 'Draft 151cm' })
+    assert_template_result 'Product: Draft 151cm ', '{% include template for product %}',
+                           '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 }))
-    assert_equal(1, file_system.count)
+    assert_equal 'from CountingFileSystemfrom CountingFileSystem',
+                 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 }))
-    assert_equal(1, file_system.count)
+    assert_equal 'from CountingFileSystem',
+                 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 }))
-    assert_equal(2, file_system.count)
+    assert_equal 'from CountingFileSystem',
+                 Template.parse("{% include 'pick_a_source' %}").render!({}, registers: { file_system: file_system })
+    assert_equal 2, file_system.count
   end
 
   def test_include_tag_within_if_statement
-    assert_template_result("foo_if_true", "{% if true %}{% include 'foo_if_true' %}{% endif %}")
+    assert_template_result 'foo_if_true', "{% if true %}{% include 'foo_if_true' %}{% endif %}"
   end
 
   def test_custom_include_tag
     original_tag = Liquid::Template.tags['include']
     Liquid::Template.tags['include'] = CustomInclude
     begin
-      assert_equal("custom_foo",
-        Template.parse("{% include 'custom_foo' %}").render!)
+      assert_equal 'custom_foo',
+                   Template.parse("{% include 'custom_foo' %}").render!
     ensure
       Liquid::Template.tags['include'] = original_tag
     end
@@ -206,8 +192,8 @@ class IncludeTagTest < Minitest::Test
     original_tag = Liquid::Template.tags['include']
     Liquid::Template.tags['include'] = CustomInclude
     begin
-      assert_equal("custom_foo_if_true",
-        Template.parse("{% if true %}{% include 'custom_foo_if_true' %}{% endif %}").render!)
+      assert_equal 'custom_foo_if_true',
+                   Template.parse("{% if true %}{% include 'custom_foo_if_true' %}{% endif %}").render!
     ensure
       Liquid::Template.tags['include'] = original_tag
     end
@@ -218,21 +204,21 @@ class IncludeTagTest < Minitest::Test
 
     a = Liquid::Template.parse(' {% include "nested_template" %}')
     a.render!
-    assert_empty(a.errors)
+    assert_empty a.errors
   end
 
   def test_passing_options_to_included_templates
     assert_raises(Liquid::SyntaxError) do
-      Template.parse("{% include template %}", error_mode: :strict).render!("template" => '{{ "X" || downcase }}')
+      Template.parse('{% include template %}', error_mode: :strict).render!('template' => '{{ "X" || downcase }}')
     end
     with_error_mode(:lax) do
-      assert_equal 'x', Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: true).render!("template" => '{{ "X" || downcase }}')
+      assert_equal 'x', Template.parse('{% include template %}', error_mode: :strict, include_options_blacklist: true).render!('template' => '{{ "X" || downcase }}')
     end
     assert_raises(Liquid::SyntaxError) do
-      Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: [:locale]).render!("template" => '{{ "X" || downcase }}')
+      Template.parse('{% include template %}', error_mode: :strict, include_options_blacklist: [:locale]).render!('template' => '{{ "X" || downcase }}')
     end
     with_error_mode(:lax) do
-      assert_equal 'x', Template.parse("{% include template %}", error_mode: :strict, include_options_blacklist: [:error_mode]).render!("template" => '{{ "X" || downcase }}')
+      assert_equal 'x', Template.parse('{% include template %}', error_mode: :strict, include_options_blacklist: [:error_mode]).render!('template' => '{{ "X" || downcase }}')
     end
   end
 
@@ -248,22 +234,22 @@ class IncludeTagTest < Minitest::Test
   end
 
   def test_including_via_variable_value
-    assert_template_result("from TestFileSystem", "{% assign page = 'pick_a_source' %}{% include page %}")
+    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 %}", 'product' => { 'title' => 'Draft 151cm' }
 
-    assert_template_result("Product: Draft 151cm ", "{% assign page = 'product' %}{% include page for foo %}", "foo" => { 'title' => 'Draft 151cm' })
+    assert_template_result 'Product: Draft 151cm ', "{% assign page = 'product' %}{% include page for foo %}", 'foo' => { 'title' => 'Draft 151cm' }
   end
 
   def test_including_with_strict_variables
     template = Liquid::Template.parse("{% include 'simple' %}", error_mode: :warn)
     template.render(nil, strict_variables: true)
 
-    assert_equal([], template.errors)
+    assert_equal [], template.errors
   end
 
   def test_break_through_include
-    assert_template_result("1", "{% for i in (1..3) %}{{ i }}{% break %}{{ i }}{% endfor %}")
-    assert_template_result("1", "{% for i in (1..3) %}{{ i }}{% include 'break' %}{{ i }}{% endfor %}")
+    assert_template_result '1', '{% for i in (1..3) %}{{ i }}{% break %}{{ i }}{% endfor %}'
+    assert_template_result '1', "{% for i in (1..3) %}{{ i }}{% include 'break' %}{{ i }}{% endfor %}"
   end
 end # IncludeTagTest