module ActionDispatch::Assertions::RoutingAssertions::ClassMethods

end
end
resources :users
set.draw do
with_routing do |set|

create some routes using `set.draw { match ... }`:
The new instance is yielded to the passed block. Typically the block will

temporarily replaces @routes with a new RouteSet instance before each test.
A helper to make it easier to test different route configurations. This method

def with_routing(&block)
  old_routes, old_controller = nil
  setup do
    old_routes, old_controller = @routes, @controller
    create_routes(&block)
  end
  teardown do
    reset_routes(old_routes, old_controller)
  end
end