JUnit 5 Full Course for Beginners [2025] - Java Unit Testing
What you'll learn
- Learn to Write Unit tests using JUnit 5 Framework
- JUnit Lifecycle Annotations
- JUnit Assertions
- JUnit Exception Testing
- JUnit Test Suites
- JUnit Parameterized Tests
- JUnit Nested Tests
- JUnit Disable Tests
- JUnit Display Test Names
- JUnit Repeated Tests
- JUnit Test Execution Order
- Build Banking App in Java
- Write a JUnit tests for Banking App
Requirements
- Java
- IntelliJ IDEA
Description
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:
Introduction to JUnit 5
Writing Your First JUnit Test
Steps to Write JUnit Tests
JUnit @Test Annotation
JUnit Lifecycle Annotations: JUnit @BeforeEach, @AfterEach, @BeforeAll and @AfterAll Annotations
JUnit Assertions
JUnit Exception Testing
JUnit Test Suites
JUnit Parameterized Tests
JUnit Nested Tests
JUnit Disable Tests
JUnit Display Test Names
JUnit Repeated Tests
JUnit Test Execution Order
Build Banking App
Write a JUnit test for Banking App
Tools and Technologies Used
Java 21
Maven
JUnit 5
IntelliJ IDEA
Who this course is for:
- This course is for Java developers who want to learn complete JUnit 5 framework from the scratch.
Instructor
Hi, I'm Ramesh Fadatare, a Software Engineer with 12+ years of experience in Java, Spring Boot, Microservices, Hibernate, Angular, React, and related open-source technologies.
I am a VMware Spring Certified Professional. Check out my blog to learn more about this certification.
I am a founder and author of the top Java blog website Java Guides ( 1m views per month) - a technical blog dedicated to Java/Java EE, Spring Boot, Microservices, and Full-stack Java Development.
I am also a YouTuber with 170K+ subscribers.
I have published around 200+ free sample projects on GitHub (5K followers).
Note: All my courses are only available on the Udemy platform, so you can join here.