JUnit 5 Tutorial

This JUnit 5 tutorial teaches us how to write and run tests for our Java and Kotlin code. The tutorial targets both beginners and people already familiar with some version of JUnit.

The articles in the tutorial have been broken down to different sections.

Getting Started

Basics features of JUnit 5

  » Getting Started with JUnit 5: Writing Your First Test

  » JUnit 5 Assertions: Verifying Test Results

  » JUnit 5 Nested Tests: Grouping Related Tests Together

  » JUnit 5 Test Lifecycle: Before and After Annotations

  » A More Practical Guide to JUnit 5 Parameterized Tests

Advanced

When you already know the basics

  » Using Mockito with JUnit 5

  » JUnit 5 with Kotlin for Java developers

  » Migrating From JUnit 4 to JUnit 5: A Definitive Guide

Build Support

Running JUnit 5 tests

  » JUnit 5 Maven Example: Running Tests with Surefire

  » JUnit 5 Gradle Example: Running Tests with Gradle

Frequently Asked Questions

Answers to common questions

  » How to assert an exception is thrown?

  » How do I test private methods?