Test_Driven Development in Python

Test-driven development is not about testing. Test-driven development is about development (and design), specifically improving the quality and design of code. The resulting unit tests are just an extremely useful by-product. That's all I'm going to tell you about test-driven development. The rest of this article will show you how it works. Come work on a project with me; we'll build a very simple tool together. I'll make mistakes, fix them, and change designs in response to what the tests tell me. Along the way, we'll throw in a few refactorings, design patterns, and object-oriented design principles. To make this project fun, we'll do it in Python.