> if you encode all your edge cases into end-to-end integration tests I think that's what you should do. Your integration tests should check that all your spec

> if you encode all your edge cases into end-to-end integration tests I think that's what you should do. Your integration tests should check that all your specifications are validated. And your specifications should cover all edge cases. So yes that's a lot of "slow" tests. But I think the best would be to work on the tooling to make those tests faster and easier to setup, not limit their quantity.