Python Tutorial: Unit Testing Your Code with the unittest Module

Please Learn How To Write Tests in Python… • Pytest Tutorial

How to write unit tests in Python using pytest and PyCharm

Unit vs integration vs system testing - explained with examples

Python Mocking Tutorial: Unit Testing with unittest.mock for Beginners

Python Mocking: How to Wrap Methods Without Instantiating Objects

How to Mock a Method Globally with unittest.mock.patch in Python