JUnit is supported by almost any Java IDEs and build tools, thus it is the default choice of programmers to test their code.Eclipse has very good support for JUnit - the IDE is shipped with JUnit as its default testing library. You as a programmer - should write and run unit tests to ensure that your code meets its design and behaves as intended.And JUnit is one of the most popular unit testing frameworks for Java development. Why using JUnit?Unit testing is an important part in Test Driven Development (TDD) as it helps finding problems in the code as early as possible, especially when you make changes to the existing code you can run unit tests again to make sure that the changes do not break the application (regression). The versions of JUnit covered in this tutorial are JUnit 4 and JUnit 5.By the end, you will understand how JUnit works and be able to write test classes and test methods for your daily coding. You will learn the structure of a test class, some JUnit annotations and assert methods, how to create a unit test case in Eclipse and run it. This tutorial helps you get started with JUnit - one of the most popular unit testing frameworks for Java application development.

How to use eclipse