How to Write JUnit Test Cases: Step-by-Step Guide

This article provides a comprehensive guide to writing JUnit test cases in Java. It explains the importance of automating unit tests using JUnit, and how it simplifies testing by offering features like annotations for structuring tests and seamless integration with build tools. The author then demonstrates how to write effective JUnit test cases using IntelliJ IDE, covering topics such as writing test cases with annotations, performing assertions, and running tests on the cloud. Finally, the article outlines best practices for writing JUnit test cases, including clear and descriptive test names, following the Arrange-Act-Assert pattern, testing one thing at a time, using assertions effectively, and keeping tests independent.