testing for a controller that does not exist

class StateControllerTest < ActionController::TestCase

   get :index


get :index works. However because of recent change in the controller name I want /mystate/index to go to the same place. I put in a FourOhFour cathcall controller which redirect user from /mystate/index to /state/index. It works.

But how do I get that /mystate/index goes to /state/index . The problem is that I do not have a controller named MystateController anymore.

Any suggestions.