Book Image

Mastering Software Testing with JUnit 5

By : Boni Garcia
Book Image

Mastering Software Testing with JUnit 5

By: Boni Garcia

Overview of this book

When building an application it is of utmost importance to have clean code, a productive environment and efficient systems in place. Having automated unit testing in place helps developers to achieve these goals. The JUnit testing framework is a popular choice among Java developers and has recently released a major version update with JUnit 5. This book shows you how to make use of the power of JUnit 5 to write better software. The book begins with an introduction to software quality and software testing. After that, you will see an in-depth analysis of all the features of Jupiter, the new programming and extension model provided by JUnit 5. You will learn how to integrate JUnit 5 with other frameworks such as Mockito, Spring, Selenium, Cucumber, and Docker. After the technical features of JUnit 5, the final part of this book will train you for the daily work of a software tester. You will learn best practices for writing meaningful tests. Finally, you will learn how software testing fits into the overall software development process, and sits alongside continuous integration, defect tracking, and test reporting.
Table of Contents (8 chapters)

Migration from JUnit 4 to JUnit 5

JUnit 5 does not support JUnit 4 features, such as Rules and Runners, natively. Nevertheless, JUnit 5 provides a gentle migration path via the JUnit Vintage test engine, which allows us to execute legacy test cases (including JUnit 4 but also JUnit 3) on the top of the JUnit Platform.

The following table can be used to summarize the main differences between JUnit 4 and 5:

Feature

JUnit 4

JUnit 5

Annotations package

org.junit

org.junit.jupiter.api

Declaring a test

@Test

@Test

Setup for all tests

@BeforeClass

@BeforeAll

Setup per test

@Before

@BeforeEach

Tear down per test

@After

@AfterEach

Tear down for all tests

@AfterClass

@AfterAll

Tagging and filtering

@Category

@Tag

Disable a test method or class

@Ignore

@Disabled

Nested tests

NA

@Nested

Repeated test

Using...