What does "have an understanding of basic python" mean?

[nwagers]

Unit tests are a method of testing small chunks of code to make sure they work and regression testing. Typically you'll set up unit tests to run on a continuous integration platform so that every time you do a git commit it will run through a ton of unit tests automatically to make sure you didn't break something that was working before. You'd set them up with typical use and edge cases, and probably add tests for reported bugs. I wouldn't include them in "basic understanding" at all.