Writing good unit tests is made much easier by **dependency injection**. This lets you separate your code's behavior from that of your dependencies. Many people use **mocks** to add dependencies to unit tests. I think this is usually a mistake.

Always interesting to hear different points of view on this subject. Personally I think mocks make sense to capture complex sets of interactions or otherwise difficult to reach error conditions, so I don’t think it’s a do or do-not kind of thing.

  • UkcoderEnglish
    1·
    1 year ago

    Unless I’m missing something, the author seems to think that a “Mock” means verification of exact /fixed/fragile call sequences, but instead advocates use of (undefined) “Fake” objects or alternatively skipping those unit tests and relying on integration or other high level tests for those parts of the system…

    I can’t decide if they actually believe that “Fake” != “Mock” or it’s just to drum up traffic…