>>edwinn+wd
Well, it depends on what you mean, I suppose. I've integrated Emacs with tools like those, so that I can (for example) get linting feedback on code in real time, or jump to locations from a unit test failure report. But I've never written unit tests, or used coverage or static analysis tools, that
depended on Emacs, or indeed on any other editor. I've never even seen that kind of tight coupling, much less perpetrated it myself. I'm not sure whether that's what you're talking about, or whether it only sounds like that's what you're talking about, but I hope it's the latter.