I feel like developers who don't write tests while writing their production code aren't doing a real job in 2024. Sure you might have a QA team or something, but that should be a vast minority of the tests being written. Test driven development and Agile and all that had some people upset and whiny 20 years ago, but if I see code without tests, I assume it's broken. The only way anyone knows anything works both now AND when the next 10, 100, 1000 commits roll in, your manually-tested edge cases have long been forgotten and I doubt you even got it right at all. Let's keep normalizing writing tests and thinking, up front, how to ensure our code works. That's the best time to think about all those pesky edge cases, and it's the only practical way to keep code working. Don't hoist this on to some poor chum because you are lazy or don't know how.
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