> I just personally haven’t found any use for them in any of my projects or my clients’ projects. I wonder how that person makes sure that what they deliver ac

> I just personally haven’t found any use for them in any of my projects or my clients’ projects. I wonder how that person makes sure that what they deliver actually works. Testing by hand can only get you so far. And when the client calls a year later with some change requests, tests are a great way to know that you haven't fucked up something that used to work because you forgot a small implementation detail.