Yeah it all depends; unit tests can make refactoring even more difficult (especially if you heavily rely on mocking). I've done major refactoring (moving from

Yeah it all depends; unit tests can make refactoring even more difficult (especially if you heavily rely on mocking). I've done major refactoring (moving from one language to another) and the testing was done entirely on the rest api. With several thousand tests I felt very confident that the user experience and expected behavior remain unchanged. Honestly I don't hate unit testing and do I use it on a regular basis, the article was rather heavy handed.