move env check to railtie

Author: grosser

lib/prototype-rails.rb

@@ -10,6 +10,12 @@ class Engine < Rails::Engine
 
       ActiveSupport.on_load(:action_view) do
         require 'prototype-rails/on_load_action_view'
+        if Rails.env.test?
+          ActionView::TestCase.class_eval do
+            include ActionView::Helpers::PrototypeHelper
+            include ActionView::Helpers::ScriptaculousHelper
+          end
+        end
       end
     end
   end

lib/prototype-rails/on_load_action_view.rb

@@ -14,11 +14,4 @@
   include ActionView::Helpers::ScriptaculousHelper
 end
 
-if Rails.env.test?
-  ActionView::TestCase.class_eval do
-    include ActionView::Helpers::PrototypeHelper
-    include ActionView::Helpers::ScriptaculousHelper
-  end
-end
-
 ActionView::Template.register_template_handler :rjs, ActionView::Template::Handlers::RJS.new