NMock2.0 - how to stub a non interface call?

Posted by dferraro on Stack Overflow See other posts from Stack Overflow or by dferraro
Published on 2010-02-19T16:11:12Z Indexed on 2010/04/26 16:43 UTC
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Hello,

I have a class API which has full code coverage and uses DI to mock out all the logic in the main class function (Job.Run) which does all the work.

I found a bug in production where we werent doing some validation on one of the data input fields.

So, I added a stub function called ValidateFoo()... Wrote a unit test against this function to Expect a JobFailedException, ran the test - it failed obviously because that function was empty. I added the validation logic, and now the test passes.

Great, now we know the validation works. Problem is - how do I write the test to make sure that ValidateFoo() is actually called inside Job.Run()? ValidateFoo() is a private method of the Job class - so it's not an interface...

Is there anyway to do this with NMock2.0? I know TypeMock supports fakes of non interface types. But changing mock libs right now is not an option. At this point if NMock can't support it, I will simply just add the ValidateFoo() call to the Run() method and test things manually - which obviously I'd prefer not to do considering my Job.Run() method has 100% coverage right now. Any Advice? Thanks very much it is appreciated.

EDIT: the other option I have in mind is to just create an integration test for my Job.Run functionality (injecting to it true implementations of the composite objects instead of mocks). I will give it a bad input value for that field and then validate that the job failed. This works and covers my test - but it's not really a unit test but instead an integration test that tests one unit of functionality.... hmm..

EDIT2: IS there any way to do tihs? Anyone have ideas? Maybe TypeMock - or a better design?

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