JUnit 5 Full Course for Beginners [2025] - Java Unit Testing

JUnit 5 Full Course for Beginners [2025] - Java Unit Testing free download

Learn Unit testing in Java using JUnit 5, Java 21, JUnit 5, Maven, and IntelliJ IDEA. Unit Testing Banking App in Java.

This course is designed for beginners and experienced programmers to learn everything about the JUnit framework from scratch. All dependencies and examples in this tutorial are up-to-date and use the latest version of JUnit (JUnit 5+). In this course, you will learn unit testing for a banking app.

What is Unit Testing?

Unit testing is a way to check small parts of your program, like individual functions or methods, to make sure they work correctly. The main goals of unit testing are to:

• Make sure each part of the program works as expected.

• Make it easier to change and improve the code.

• Ensure the program is reliable and bug-free.

By focusing on small parts, developers can find and fix bugs early, leading to better and more stable programs.

What is the JUnit 5 Framework?

JUnit is a framework that allows developers to create and run tests easily. It helps you write tests that automatically check if your code works correctly. JUnit is widely used because it makes testing simple and helps ensure your code behaves as expected.

JUnit Framework is a de-facto standard for writing unit tests in Java.

JUnit is a commonly used testing framework for Java projects. Knowing how to use JUnit is a valuable skill for any Java developer.

Writing tests with JUnit helps you find and fix bugs early in the development process, saving time and effort later.

What You Will Learn

Here are the key topics you’ll explore in this course:

1. Introduction to JUnit 5

2. Writing Your First JUnit Test

3. Steps to Write JUnit Tests

4. JUnit @Test Annotation

5. JUnit Lifecycle Annotations: JUnit @BeforeEach, @AfterEach, @BeforeAll and @AfterAll Annotations

6. JUnit Assertions

7. JUnit Exception Testing

8. JUnit Test Suites

9. JUnit Parameterized Tests

10. JUnit Nested Tests

11. JUnit Disable Tests

12. JUnit Display Test Names

13. JUnit Repeated Tests

14. JUnit Test Execution Order

15. Build Banking App

16. Write a JUnit test for  Banking App

Tools and Technologies Used

1. Java 21

2. Maven

3. JUnit 5

4. IntelliJ IDEA