Merge pull request #210 from Shopify/truncate_utf8_test

UTF8 truncate test

.gitignore

@@ -4,3 +4,4 @@
 pkg
 *.rbc
 .rvmrc
+.ruby-version

lib/liquid/standardfilters.rb

@@ -43,7 +43,8 @@ module Liquid
       if input.nil? then return end
       l = length.to_i - truncate_string.length
       l = 0 if l < 0
-      input.length > length.to_i ? input[0...l] + truncate_string : input
+      truncated = RUBY_VERSION[0,3] == "1.8" ? input.scan(/./mu)[0...l].to_s : input[0...l]
+      input.length > length.to_i ? truncated + truncate_string : input
     end
 
     def truncatewords(input, words = 15, truncate_string = "...")

test/liquid/standard_filter_test.rb

@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 require 'test_helper'
 
 class Filters
@@ -37,6 +39,7 @@ class StandardFiltersTest < Test::Unit::TestCase
     assert_equal '1234567890', @filters.truncate('1234567890', 20)
     assert_equal '...', @filters.truncate('1234567890', 0)
     assert_equal '1234567890', @filters.truncate('1234567890')
+    assert_equal "测试...", @filters.truncate("测试测试测试测试", 5)
   end
 
   def test_strip
@@ -61,6 +64,7 @@ class StandardFiltersTest < Test::Unit::TestCase
     assert_equal 'one two...', @filters.truncatewords('one two three', 2)
     assert_equal 'one two three', @filters.truncatewords('one two three')
     assert_equal 'Two small (13&#8221; x 5.5&#8221; x 10&#8221; high) baskets fit inside one large basket (13&#8221;...', @filters.truncatewords('Two small (13&#8221; x 5.5&#8221; x 10&#8221; high) baskets fit inside one large basket (13&#8221; x 16&#8221; x 10.5&#8221; high) with cover.', 15)
+    assert_equal "测试测试测试测试", @filters.truncatewords('测试测试测试测试', 5)
   end
 
   def test_strip_html