11.1 Unit Testing with unittest
Unit testing is an essential method of testing that verifies the individual parts of a program – the 'units'. These units, also known as components, can be considered the smallest testable part of an application and can be a function, a method, or a class.
In Python, the built-in unittest module is used to perform unit testing. It's inspired by the xUnit architecture, which is a framework used to create test cases, and is present in almost all languages. The xUnit architecture is based on the concept of testing individual components of a software application in isolation from the rest of the system.
The unittest module provides a rich set of tools for constructing and running tests. This includes a framework for test suites (groupings of test cases), test cases, test loaders, and test runners. It's easy to create a complete testing suite in Python using the unittest module, which makes it an ideal choice for software developers...