Testing

Using Mockito with JUnit 5

Learn how to use the Mockito mocking framework with JUnit 5. Learn both the test framework independent way, and using the Mockito JUnit 5 extension.

JUnit 5 Test Lifecycle: Before and After Annotations

Learn how to run code before and after each test or all tests in the test class. Also learn the execution order of lifecycle methods in different cases.

JUnit 5 Expected Exception: How to assert an exception is thrown?

In this article, we will learn how to assert an exception is thrown using JUnit 5. In addition, we will learn how to check the error message of the thrown exception.

A More Practical Guide to JUnit 5 Parameterized Tests

This tutorial teaches you how to write JUnit 5 parameterized tests. It is structured so that it also answers most asked questions about parameterized tests.

Getting Started with JUnit 5: Writing Your First Test

In this article, we will learn how to write and run a simple JUnit 5 test. We will learn how setup preconditions, interact with the object we want to test, and verify that it behaves like we expect.

JUnit 5 Assertions: Verifying Test Results

Learn how to verify test results using JUnit 5 assertions. Learn the basic assertion methods, error message customization and assertion grouping.

JUnit 5 with Kotlin

Learn the differences between writing JUnit 5 tests in Kotlin and Java. Learn to configure JUnit 5 in the build script using Gradle Kotlin DSL.

JUnit 5 Maven Example: Running Tests with Surefire

In this JUnit 5 Maven example, we will learn how to get the required dependencies for writing JUnit 5 tests with Maven. Also, we will learn how to configure the Maven Surefire plugin to run the tests.

JUnit 5 Gradle Example

In this JUnit 5 Gradle example, we will learn how to get the required dependencies for writing JUnit 5 tests with Gradle. Also, we will learn how to configure the JUnit Gradle plugin to run the tests.

Migrating from JUnit 4 to JUnit 5: A Definitive Guide

Learn how to migrate from JUnit 4 to JUnit 5. See how to run existing tests along with the new version, and what changes are needed to migrate the code.