How to test a controller mapped to a non-canonical path?

I have a controller `SuperPower` that is responsible for the paths under `/super-power`, and not the canonical `/super_power` (notice the hyphen instead of the underscore).

In my `routes.rb` I have

     resources 'super-power', as :super_power

My `super_power_test.rb` contains

     class SuperPowerControllerTest < ActionController::TestCase          test "shows all available" do              get :index

             assert_not_nil assign(:powers)          end      end

and the test fails with

     # Running tests:

     [1/1] SuperPowerControllerTest#test_shows_all_available = 0.08 s       1) Error:      test_shows_all_available(SuperPowerControllerTest):        ActionController::RoutingError: No route matches {:controller=>"super_power"}

The test fails because it doesn't use the correct path `/super-power` but uses the canonical `/super_power`.

Is there a way to associate the tests of a controller to a certain path? Is there a way to make this change for all the tests?