That's testament, a tool used for internal testing that has grown all the features we needed for testing. Much of it wasn't designed but grown. It's still better than unittest IME which is why I promoted it.
I typically write custom test code though and often I don't need more than `when isMainModule: assert`. `nimble search unittest` produces a couple of results, among it "unittest2": <https://github.com/status-im/nim-unittest2> Clicking on this link, I see documentation. It looks decent to me. Ok, it's no comparison to pytest indeed but then I read that pytest has over "800+ external plugins". For you this probably screams "yes, I wanna use that!". For me it screams "wtf, better avoid it".
