How do you test for a routing error in Rails 3?

After searching, can't find the answer to this simple question. Yes, I read the Guides many times.

Here's what I got so far.

test "there开发者_如何转开发 is no route for this request" do
  assert_raise(Exception) {
    post :the_route
  }
end

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Are there any resources that explain the basics of testing (besides the Guides)?

Thanks.

---

Have you looked into the routing assertions at all? They could be what you're looking for. Most app's I've worked on have at least one "routes_test". check them out here:

http://api.rubyonrails.org/classes/ActionDispatch/Assertions/RoutingAssertions.html