Unit tests can be illuminating.
@olives Sure but also I meant anything specifically you are looking at and was asking if you wanted to share specific context? (what you're looking)
(So not just the general idea / https://en.wikipedia.org/wiki/Unit_testing)
@freeschool The point of an automated test is that you write hundreds or more tests which test little parts of a program with varying inputs to make sure that they work as they should.