I’m sure you could end up writing a test that’s bad in just the right way to end up doing more harm than good, but I do think that’s the exception(heh).
That’s exactly why I’ve asked. That is where I’ve gone wrong with TDD in the past, especially where any sort of math is involved due to being absolutely horrible at it (and I do game dev these days!). I can problem solve and write the code, I just can’t manually proof the math without external help and have spent countless hours looking for where my issue was due to being 100% certain that the formula or algorithm was correct >.<
Nowadays anytime numbers are involved I write the tests after doing manual tests multiple times and getting the expected response, and/or having an LLM check the work and make suggestions. That in itself introduces more issues sometimes since that can also be wrong. Probably should have paid attention in school all those years ago lol