Merge pull request #303 from Shopify/strip_filter

Add strip, lstrip, rstrip filters

History.md

@@ -3,6 +3,7 @@
 ## 3.0.0 / not yet released / branch "master"
 
 * ...
+* Add strip, lstrip, and rstrip to standard filters [Florian Weingarten, fw42]
 * Make if, for & case tags return complete and consistent nodelists, see #250 [Nick Jones, dntj]
 * Prevent arbitrary method invocation on condition objects, see #274 [Dylan Thacker-Smith, dylanahsmith]
 * Don't call to_sym when creating conditions for security reasons, see #273 [Bouke van der Bijl, bouk]

lib/liquid/standardfilters.rb

@@ -63,6 +63,18 @@ module Liquid
       input.split(pattern)
     end
 
+    def strip(input)
+      input.to_s.strip
+    end
+
+    def lstrip(input)
+      input.to_s.lstrip
+    end
+
+    def rstrip(input)
+      input.to_s.rstrip
+    end
+
     def strip_html(input)
       input.to_s.gsub(/<script.*?<\/script>/m, '').gsub(/<!--.*?-->/m, '').gsub(/<style.*?<\/style>/m, '').gsub(/<.*?>/m, '')
     end

test/liquid/standard_filter_test.rb

@@ -209,6 +209,21 @@ class StandardFiltersTest < Test::Unit::TestCase
     assert_template_result 'foobar', "{{ 'foo|bar' | remove: '|' }}"
   end
 
+  def test_strip
+    assert_template_result 'ab c', "{{ source | strip }}", 'source' => " ab c  "
+    assert_template_result 'ab c', "{{ source | strip }}", 'source' => " \tab c  \n \t"
+  end
+
+  def test_lstrip
+    assert_template_result 'ab c  ', "{{ source | lstrip }}", 'source' => " ab c  "
+    assert_template_result "ab c  \n \t", "{{ source | lstrip }}", 'source' => " \tab c  \n \t"
+  end
+
+  def test_rstrip
+    assert_template_result " ab c", "{{ source | rstrip }}", 'source' => " ab c  "
+    assert_template_result " \tab c", "{{ source | rstrip }}", 'source' => " \tab c  \n \t"
+  end
+
   def test_strip_newlines
     assert_template_result 'abc', "{{ source | strip_newlines }}", 'source' => "a\nb\nc"
     assert_template_result 'abc', "{{ source | strip_newlines }}", 'source' => "a\r\nb\nc"