Gain insights into configuring and utilizing JUnit 5 for Java unit testing. Learn about writing effective unit tests, integrating assertions, assumptions, parameterized tests, and their significance.

Junit 5 is the most popular and widely used Java unit testing framework. In this course, you will learn step by step, how to configure and use JUnit 5 testing framework. This course will teach you how to write unit tests with JUnit 5, covering topics like why unit tests are important, the structure of good unit tests, assertions, assumptions and parameterized tests and more.

Java Unit Testing with JUnit 5

# Class Under Test ###

Let's first create a class with some functionality to test. This class will have the method for which we will write our test scenarios to demonstrate the @Test annotation’s usability. The class name in our example would be - `OddEven`, as shown in the code below.   

# Method Under Test ###

Inside `OddEven` class, let's create a method by name `isEvenNumber()`. This method will take in an integer value and return a boolean value that whether the given number is even number or not. If the number is even it will return true and if it is odd then it will return false. Let's have a look into the code below.

In this lesson, we’ll look into a quick review of JUnit’s 5 @Test annotation. This annotation provides a powerful tool for performing unit testing.

Getting Started

Assertions in Junit 5

Junit 5 Test Lifecycle Callbacks

Display Names

Dependency Injection for Constructors and Methods

Assumptions in Junit 5

Disable or Enable Tests in Junit 5

Nested Tests in Junit 5

JUnit 5 Integration with Maven

Parameterized Tests in Junit 5

Repeated Tests in Junit 5

Appendix

@Test Annotation

Class Under Test

Method Under Test