Keep compatibility with ruby 1.9.3 and 2.0.0

spec/spec_helper.rb

@@ -11,8 +11,12 @@
 
 module Rails4Compatibility
   module Testing
-    def process(*args)
-      compatible_request(*args) { |*new_args| super(*new_args) }
+    def process_with_rails4_compat(*args)
+      compatible_request(*args) { |*new_args| process_without_rails4_compat(*new_args) }
+    end
+
+    def self.included(base)
+      base.alias_method_chain :process, :rails4_compat
     end
 
     def compatible_request(method, action, hash = {})
@@ -67,4 +71,5 @@ def compatible_request(method, action, hash = {})
 end
 
 require 'action_controller/test_case.rb'
-ActionController::TestCase::Behavior.prepend(Rails4Compatibility::Testing)
+# TODO: replace with prepend once we deprecate ruby 2.0.0
+ActionController::TestCase::Behavior.send(:include, Rails4Compatibility::Testing)