Using ActiveSupport::JSON for better compatibility

test/unit/serializer_test.rb

@@ -3,11 +3,11 @@
 class CustomSerializer
  require 'json'
  def self.dump(object_hash)
- object_hash.to_json
+ ActiveSupport::JSON.encode object_hash
  end
 
  def self.load(string)
- JSON.parse string
+ ActiveSupport::JSON.decode string
  end
 end
 
@@ -63,8 +63,8 @@ class SerializerTest < ActiveSupport::TestCase
 
  # Check values are stored as JSON.
  hash = {"widget_id" => nil,"name" =>"Some text.","id" =>1}
- assert_equal hash.to_json, @fluxor.versions[1].object
- assert_equal hash, JSON.parse(@fluxor.versions[1].object)
+ assert_equal ActiveSupport::JSON.encode(hash), @fluxor.versions[1].object
+ assert_equal hash, ActiveSupport::JSON.decode(@fluxor.versions[1].object)
  end
 
  should 'store object_changes' do