Run AC & AV railties on the testing app

Author: amatsuda

test/test_helper.rb

@@ -8,6 +8,8 @@
 require "active_support/cache/memory_store"
 require "active_support/json"
 require "active_model"
+require 'action_controller/railtie'
+require 'action_view/railtie'
 
 require "active_support/testing/autorun"
 require "mocha/minitest"