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)

Repeated tests

JUnit Jupiter provides for the ability to repeat a test a specified number of times simply by annotating a method with @RepeatedTest, specifying the total number of repetitions desired. Each repeated test behaves exactly as a regular @Test method. Moreover, each repeated test preserves the same lifecycle callbacks (@BeforeEach, @AfterEach, and so on).

The following Java class contains a test that is going to be repeated five times:

package io.github.bonigarcia;

import org.junit.jupiter.api.RepeatedTest;

class SimpleRepeatedTest {

@RepeatedTest(5)
void test() {
System.out.println("Repeated test");
}

}

Due to the fact that this test only writes a line (Repeated test) in the standard output, when executing this test in the console, we will see that trace five times:

Execution of repeated test in the console

In addition to specifying the number...