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

You can pass a delegate to WhenCalled to count calls:

...
uint callCount = 0;
source.Expect(x => x.GetSomethingThatTakesALotOfResources(key))
    .Return(new Something())
    .WhenCalled((y) => { callCount++; });
...
Assert.AreEqual(1, callCount);

Also, you should use a mock not a stub, and verify expectations on the mock too.