Skilled Python programmers agree that testing is one of the most important aspects of software development. Even though this chapter is placed near the end of the book, it is not an afterthought; everything we have studied so far will help us when writing tests. In this chapter, we'll look at the following topics:
- The importance of unit testing and test-driven development
- The standard unittest module
- The pytest automated testing suite
- The mock module
- Code coverage
- Cross-platform testing with tox
