How can I assert that no route matches in a Rails integration test?

Question

I have a Rails 3 integration test which tests my routes. It contains tests such as:

assert_routing(
    \"/#{@category.url.path}/#{@foo.url.path}\",
    { :c         


        

Answer 1

By calling #recognize_path you wont receive a false. Instead you'll get an error, but then you found the clue you were looking for.

test "No routes match when neither_foo_nor_ bar exist" do
  begin 
    assert_not(Rails.application.routes.recognize_path(
        'category/this-is-neither-a-foo-nor-a-bar'))
  rescue ActionController::RoutingError => error
    assert error.message.start_with? "No route matches"
  end
end

Answer 2

Have you tried method_missing(selector, *args, &block)? Defined Here

Answer 3

I ended up doing this:

  def test_no_routes_match_when_neither_foo_nor_bar_exist
    assert_raises(ActionController::RoutingError) do
      assert_recognizes({}, '/category/this-is-neither-a-foo-nor-a-bar')
    end
  end

Slightly silly, but it gets the job done.

Note that this does not work with Rails 4. See the answer below for a Rails 4 solution.

Answer 4

There is a similar way for checking this in Rails 4 by asserting on the UrlGenerationError exception:

def test_no_routes_match_when_neither_foo_nor_bar_exist
  assert_raises(ActionController::UrlGenerationError) do
    get '/category/this-is-neither-a-foo-nor-a-bar'
  end
end