Functional
Tests have their place (just mocking api's doesn't seem very adequate...) but the devil is always in the non-functional testing space. If this was truly AI, then it could be of use in this space. As it's not, it can't.
Edit: Oh, and writing adequate unit tests is part of the job and if you deliver code into production without them you should be shown the comfy chair.
Biting the hand that feeds IT
