I like this, in addition, I believe in documentation through unit tests. Especially when dealing with edge case business logic. Implement a test that has a verb

I like this, in addition, I believe in documentation through unit tests. Especially when dealing with edge case business logic. Implement a test that has a verbose name or description testing that logic. If someone breaks it- they are notified through a failing unit test, then they also have a clear reference of why the logic was there in the first place and they know that now they have to go to product to figure out if the logic is still relevant.