100% agree. Full code coverage with acceptance and integration tests is really good. If you can get a test case for every feature that your app is supposed to h

100% agree. Full code coverage with acceptance and integration tests is really good. If you can get a test case for every feature that your app is supposed to have you can develop quickly and ship often knowing that nothing will break. Extensive unit tests that don't test what features do but test how features are implemented are usually a waste of time in my opinion, unless there is some complicated and critical algorithm that you need more visibility and protection for. Otherwise the only purpose of those unit tests is to break for good refactors and double dev time. When You are cleaning up tech debt and make hundreds of lines of changes and no acceptance tests break (because everything is still working as it should) but 50 unit tests break... I've wasted so much of my life