Developer Guide to JUnit5 Introduction & Setup in Maven

Introduction

JUnit is the most popular unit-testing framework in Java programming language. The latest version of JUnit is JUnit 5. 

Unlike the older versions of JUnit, JUnit 5 is composed of several different modules. 

JUnit5 = JUnit Platform + JUnit Jupiter + JUnit Vintage

JUnit5 requires Java 8 (or higher) at runtime.  

JUnit Platform provides the foundation for launching the testing frameworks on the JVM. Provides the interface between JUnit & programming clients (Build tools, IDEs, 3rd party test libraries). 

JUnit Jupiter is required for writing tests & extensions in JUnit5. Provides a TestEngine for running jupiter based tests on the platform

JUnit Vintage provides a TestEngine for running JUnit3 & JUnit4 based tests on the platform. 

Architecture of JUnit 5

Referred from: https://developer.ibm.com/tutorials/j-introducing-junit5-part1-jupiter-api/

 Setup in Maven

Following dependencies are required for the JUnit5 integration. 

https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-engine

<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>5.8.2</version>
<scope>test</scope>
</dependency>        

https://mvnrepository.com/artifact/org.junit.platform/junit-platform-runner

<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-runner</artifactId>
<version>1.8.2</version>
<scope>test</scope>
</dependency>        

These two dependencies are enough to write the JUnit test cases and run. 

The complete pom.xml can be found here. pom.xml

Check out the GitHub project at The Backend Pro