Unit Testing

Unit testing is a software testing methodology where individual units or components of a software application are tested in isolation to verify that they function as intended. A unit is typically the smallest testable part of an application, such as a function, method, or class. The goal is to validate that each unit of the software performs correctly according to its design.

Also known as: Unit Tests, Unit Test, Unit Testing Framework, JUnit, pytest

Why learn Unit Testing?

Developers should learn and use unit testing to catch bugs early in the development cycle, reduce debugging time, and ensure code reliability and maintainability. It is essential for agile development, continuous integration, and refactoring, as it provides a safety net for code changes. Specific use cases include testing business logic, algorithms, and data processing functions in applications ranging from web services to mobile apps.

Learning Resources

• docs: JUnit 5 User Guide
• docs: Python Unit Testing with pytest
• book: Unit Testing Principles, Practices, and Patterns by Vladimir Khorikov
• tutorial: Introduction to Unit Testing in C# - Microsoft Learn
• tutorial: Unit Testing for Beginners - freeCodeCamp