Cannot set callback on function call that uses default parameter

[Custodia]

If you setup a callback on a function with a default parameter and then call the function without overriding the default parameter the callback function supplied to Moqs .Callback will never be called.

[stakx]

@Custodia: The following test does what you've described, and it passes just fine:

public interface IFoo
{
    void Do(int arg = 42);
}

[Fact]
void Callback_invoked_if_mocked_method_called_without_explicit_value_for_default_parameter()
{
    bool callbackInvoked = false;

    var mock = new Mock<IFoo>();
    mock.Setup(m => m.Do(It.IsAny<int>())).Callback(() => callbackInvoked = true);

    mock.Object.Do();

    Assert.True(callbackInvoked);
}

Can you post a brief failing test that demonstrates your problem?

[Custodia]

I'll look at this again on Monday.

[Custodia]

I'm actually not sure what I changed to resolve the issue but it does not indeed seem to be related to what the default parameter after all.

[stakx]

Well, I'm glad to hear you got things working. 👍