This tutorial will cover how to run Unit tests using the Maven’s Surefire plugin. If you are not familiar with Unit Testing, you can follow this tutorial for a quick catch-up.

In our Maven Project, we need the following mandatory dependencies:

<dependencies>    
<dependency>        
<groupId>org.junit.jupiter</groupId>        
<artifactId>junit-jupiter-api</artifactId>        
<version>5.4.2</version>        
<scope>test</scope>    
</dependency>    
<dependency>       
<groupId>org.junit.jupiter</groupId>        
<artifactId>junit-jupiter-engine</artifactId>        
<version>5.4.2</version>        
<scope>test</scope>    
</dependency>
</dependencies>

The junit-jupiter-engine dependency contains the implementation of the JUnit Jupiter test engine that runs our unit tests.

The junit-jupiter-api dependency provides API that allows us to write tests and extensions which use JUnit 5.

So Let’s create a very simple Java file:

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class Example1 {           
   public static int getNumber() {                        
      return 5;            
   }
   public static String getMeaningfulText() {                        
      return "Hello World";            
   }
}

Now let’s create a Test class for it:

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class TestExample1 {   
   @Test            
   public void testNumber() {                         
      assertEquals(5, Example1.getNumber());            
   }
   @Test            
   public void testMeaningfulText () {                         
      assertEquals(“Hello World”, Exampe1.getMeaningfulText ());            
   }    
}

Finally, we can run our program by using mvn clean build and we should see Superfire plugin running our unit tests

[INFO]
[INFO] --- maven-surefire-plugin:2.22.1:test (default-test) @ running-unit-tests ---
[INFO]------------------------------------------------------- T E S T S-------------------------------------------------------Running net.javatutorial.junit5.JUnit5Example1Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.039 sec -in net.javatutorial.junit5.JUnit5Example1Results :Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO] ------------------------------------------------------------------------[
INFO] BUILD SUCCESS[
INFO] ------------------------------------------------------------------------