MVVM Approach

With the MVVM approach, I can just go ahead and test it using my view model. And then I can see that the view model is getting populated or not. But with heavy mocking, which is being advocated when you're testing your view controllers and view models, those tests are not a good return on your investment. Even if you refactor your code and the behavior remains the same, the test will start failing. So now we go back to the questionable, how do we test them? Well, we test writing a real integration of end to end test,.