To be able to say to your bosses that you have 100% code coverage. No, I agree. Hitting the database is slower but not that much slower (at least if you use Po

To be able to say to your bosses that you have 100% code coverage. No, I agree. Hitting the database is slower but not that much slower (at least if you use PostgreSQL and do rollback after every test). And since the goal is correctness I think that this performance hit is small enough to be worth taking.