filtered variables for assign, case, and cycle

lib/liquid/tags/assign.rb

@@ -9,7 +9,7 @@ module Liquid
   #  {{ monkey }}
   #
   class Assign < Tag
-    Syntax = /(#{VariableSignature}+)\s*=\s*(#{QuotedFragment}+)/   
+    Syntax = /(#{VariableSignature}+)\s*=\s*(#{Expression}+)/   
   
     def initialize(tag_name, markup, tokens)          
       if markup =~ Syntax

lib/liquid/tags/case.rb

@@ -1,7 +1,7 @@
 module Liquid
   class Case < Block
-    Syntax     = /(#{QuotedFragment})/
-    WhenSyntax = /(#{QuotedFragment})(?:(?:\s+or\s+|\s*\,\s*)(#{QuotedFragment}.*))?/
+    Syntax     = /(#{Expression})/
+    WhenSyntax = /(#{Expression})(?:(?:\s+or\s+|\s*\,\s*)(#{Expression}.*))?/
 
     def initialize(tag_name, markup, tokens)      
       @blocks = []

lib/liquid/tags/cycle.rb

@@ -13,8 +13,8 @@ module Liquid
   #    <div class="green"> Item five</div>
   #
   class Cycle < Tag
-    SimpleSyntax = /#{QuotedFragment}/        
-    NamedSyntax = /(#{QuotedFragment})\s*\:\s*(.*)/
+    SimpleSyntax = /#{Expression}/        
+    NamedSyntax = /(#{Expression})\s*\:\s*(.*)/
   
     def initialize(tag_name, markup, tokens)      
       case markup
@@ -49,7 +49,7 @@ module Liquid
   
     def variables_from_string(markup)
       markup.split(',').collect do |var|
-    	  var =~ /\s*(#{QuotedFragment})\s*/
+    	  var =~ /\s*(#{Expression})\s*/
     	  $1 ? $1 : nil
     	end.compact
     end

test/assign_test.rb

@@ -0,0 +1,11 @@
+require File.dirname(__FILE__) + '/helper'
+
+class IfElseTest < Test::Unit::TestCase
+  include Liquid
+  
+  def test_with_filtered_expressions
+    assert_template_result('foo','{% assign foo = values|sort|last %}{{ foo }}', 'values' => %w{foo bar baz})
+    assert_template_result('foo','{% assign sorted = values|sort %}{{ sorted | last }}', 'values' => %w{foo bar baz})
+  end
+
+end

test/if_else_test.rb

@@ -117,6 +117,18 @@ class IfElseTest < Test::Unit::TestCase
     assert_template_result('yes','{% if "FOO BAR"|truncatewords:1,"--" == "FOO--" %}yes{% endif %}')
     assert_template_result('yes','{% if "FOO BAR"|truncatewords:1,"--"|downcase == "foo--" %}yes{% endif %}')
     assert_template_result('yes','{% if "foo--" == "FOO BAR"|truncatewords:1,"--"|downcase %}yes{% endif %}')
+    # array transformation, to make sure we aren't converting arrays to strings somewhere along the way:
+    assert_template_result('yes','{% if values|sort == sorted %}yes{% endif %}', 'values' => %w{foo bar baz}, 'sorted' => %w{bar baz foo})
+  end
+  
+  def test_allow_no_spaces_in_filtered_expressions
+    assert_template_result('','{% if "foo--" == "FOO BAR" |truncatewords:1,"--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"| truncatewords:1,"--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"|truncatewords :1,"--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"|truncatewords: 1,"--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"|truncatewords:1 ,"--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"|truncatewords:1, "--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"|truncatewords:1,"--" |downcase %}yes{% endif %}')
   end
   
   def test_syntax_error_no_variable