Unit Testing in Python

Learn the fundamentals of unit testing in Python projects. Explore techniques for test-driven development of a Python project using the pytest framework and a Docker container.

Introduction

• Python unit testing with pytest
• Why pytest?
• Roadmap
• Exercise files

1. Installation and Setup

• Docker and VS Code (Mac)
• Docker and VS Code (PC)
• Running pytest with Docker

2. Overview of Test-Driven Development and Pytest Features

• Overview of TDD
• Basic tests and assertions
• Exceptions
• Challenge: Exceptions
• Solution: Exceptions
• Happy path testing
• Sad path testing

3. Test Automation with Fixtures and Parametrization

• Fixtures to amortize costly operations
• Factory fixtures
• Parametrization
• Challenge: Parametrization
• Solution: Parameterization

4. Organizing Your Pytest Project

• Using Conftest.py for common functions
• Modularizing conftest.py

5. Using Pytest with an Existing Project

• Reading tests to surmise understand behavior
• Challenge: Adding test coverage
• Solution: Adding test coverage

Conclusion

• Next steps