As far as testing goes, there's no one correct answer. It depends on what your goals are (and they'll probably change over time). E.g. if you're rewriting all t

As far as testing goes, there's no one correct answer. It depends on what your goals are (and they'll probably change over time). E.g. if you're rewriting all the code every other week unit tests won't help you much. And unit tests won't catch many bugs. On the other hand unit tests can be extremely useful if much of your code needs to be stable and consistent. My current second-best explanation of how to choose testing based on goals is written up here: https://codewithoutrules.com/2017/03/26/why-how-test-software/ https://codewithoutrules.com/2017/03/26/why-how-test-softwar... (My best explanation is currently a slide deck that will become the third version of that post.)