Testing Your Code with `unittest` and `pytest`

Wed, 03 Dec 2025 00:00:00 +0000

Introduction to Testing Your Code

Welcome back, future Pythonista! So far, you’ve learned to write amazing Python code, build functions, create classes, and even handle errors. But how do you know your code actually works as intended, especially as it grows more complex? How do you ensure that adding a new feature doesn’t accidentally break an old one?

The answer, my friend, is testing! In this chapter, we’re going to dive into the incredibly important world of unit testing in Python. You’ll learn how to write small, focused tests for individual pieces of your code, giving you confidence that your programs are robust and reliable. We’ll explore Python’s built-in testing framework, unittest, and then introduce you to pytest, a hugely popular and powerful third-party testing tool that many developers prefer.

Unittest on AI VOID

Testing Your Code with `unittest` and `pytest`

Introduction to Testing Your Code