module ActionView::TestCase::Behavior

def method_missing(selector, *args)
  begin
    routes = @controller.respond_to?(:_routes) && @controller._routes
  rescue
    # Don't call routes, if there is an error on _routes call
  end
  if routes &&
     (routes.named_routes.route_defined?(selector) ||
       routes.mounted_helpers.method_defined?(selector))
    @controller.__send__(selector, *args)
  else
    super
  end
end