Second part of Mocking with RSpec assignment not working

In the post.rb file I created a method called save_with_initial_vote,
per the instructions.  I then modified the create action in the
post_controller.rb file to accomodate this new method.  It is throwing
an error stating "undefined method `save_with_initial_vote'".  I am not
sure if my original method is wrong, how I placed in the controller file
is wrong, or something else.