Mocks make me sad. They are so often misused by people with the best of intentions. I have seen so many tests that literally only assert the mock expectations a

Mocks make me sad. They are so often misused by people with the best of intentions. I have seen so many tests that literally only assert the mock expectations and say nothing about the code under test. I have watched upgrades and refactors take 5x longer because someone steps on a landmine of overmocking. It is so common to see people mocking dumb data objects, containers, and pure functions - creating Frankenstein widgets that break all contracts the original had except for the 1 code path the original developer used 6 months ago. I've listened to DRY/SRP fanatics defend mocks until they realized that their tests were littered with unreusable, low fidelity copies of their production system in the form of mocks. Mocks are a power tool and you can use them to do things that they are not the right tool for the job.