Asserting that a method is called exactly one time

Question

I want to assert that a method is called exactly one time. I\'m using RhinoMocks 3.5.

Here\'s what I thought would work:

Answer 1

Having a feature called "Exactly" would be handy to write tests on code that might otherwise get into an infinite loop. I would love to write a test such that the second call to a method would raise an exception.

Some libraries for python allow you to sequence expectations, so the first returns false and the second raises an exception.

Rhino won't do that. A partial mock with .Once will intercept the first call, and the rest will be passed on to the original method. So that sucks, but it's true.

You'll have to create a hand-mock. Derive a "testable" class, and give it the ability to raise after the first call.