48 - unittest: Testing Framework in Python

In Python, a unit test is a way of testing individual units or components of a program to ensure that they function as expected. The goal of unit testing is to validate that each unit of the software performs as designed.

Python has a built-in module called unittest that provides a framework for creating and running tests.

To run the tests, you typically execute the script. If all tests pass, there is usually no output. If a test fails, the testing framework provides information about which test failed and what the actual result was versus the expected result.

Unit testing is a fundamental practice in software development, promoting code reliability and maintainability by catching issues early in the development process. It is often a part of a broader testing strategy that includes integration tests, functional tests, and other types of tests.