Rails Ruby on Rails

In Rails 2.x, you used to be able to do things like this in integration tests:

get "/customers/500"
assert_response :not_found

This kind of test allows you to verify the behavior of your rescue handlers. In my case, I'm relying on the built-in default handler to catch the ActiveRecord::RecordNotFound exception and serve up :not_found (and I'm also making assertions about how the exception gets logged and reported).

But in Rails 3.x, the RecordNotFound exception propagates out through the "get" call above, and the whole test halts without ever serving up a response, as far as I can tell.

So how are we supposed to test rescue behavior in Rails 3?