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Even the digital property liberators/internet pirates don’t test their software. I feel like I’m on an island with a small population of test enthusiasts.
Ultimately, what's the point. The tool either works, or it doesn't. Then you patch what doesn't work so it does work.
Heck even the Linux kernel isn't tested.
Unit tests are so management can have a good metric to sell code quality. I don't know any time unit testing has actually benefited shipping faster (which really is the only bottom line those above you care about)
There's a lot of empirical research about this. A. Lot. Starting in the 80's, even. It's as close as it gets to empirically proven that software testing greatly reduces bugs and regressions, and accelerates delivery over the long term. It's not as clear if the acceleration is entirely freed up resources that would otherwise be spent fixing bugs, or if it also makes people develop faster. Also, it's pretty clear that Automated testing doesn't accelerate short or short term projects.