I wish he gave actual examples to illustrate what he was talking about. So you have an additional API layer the tests hit to call the functions you’re testing?

I wish he gave actual examples to illustrate what he was talking about. So you have an additional API layer the tests hit to call the functions you’re testing? Do endpoints map to classes? Modules? So aren’t you just tightly coupling this API to your service? When the service changes, you still have to update the API. Can you explain to me how this solves the problem?