Exactly. I've always hated the "You can't test what you don't know so it's worthless." Well sorry, I can test what I do know and make sure that I don't break t

Exactly. I've always hated the "You can't test what you don't know so it's worthless." Well sorry, I can test what I do know and make sure that I don't break that. As new errors come upon, you add it to your tests (akin to checklists, essentially), and make sure you don't break that use case again.