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

Here's how I'd verify a method is called once.

[Test]
public void just_once()
{
    // Arrange (Important to GenerateMock not GenerateStub)
    var a = MockRepository.GenerateMock();
    a.Expect(x => x.GetSomethingThatTakesALotOfResources()).Return(new Something()).Repeat.Once();

    // Act
    // First invocation should call GetSomethingThatTakesALotOfResources
    a.GetMeMyThing();

    // Second invocation should return cached result
    a.GetMeMyThing();

    // Assert
    a.VerifyAllExpectations();
}