If you haven't encountered the concept before, I recommend looking at the testing pyramid[1]. Basically the idea is that UI/Functional tests take a long time to

If you haven't encountered the concept before, I recommend looking at the testing pyramid[1]. Basically the idea is that UI/Functional tests take a long time to run so you want just enough to test the main, important flow in the application while you want a ton of unit tests because they run quickly and give you very targeted feedback about what might be broken. [1] https://martinfowler.com/bliki/TestPyramid.html https://martinfowler.com/bliki/TestPyramid.html