JUnit - Suite Test

Test suite is used to bundle a few unit test cases and run them together. In JUnit, both @RunWith and @Suite annotations are used to run the suite tests. This chapter takes an example having two test classes, TestJunit1 & TestJunit2, that run together using Test Suite.

Create a Class

Create a java class to be tested, say, MessageUtil.java in C:\>JUNIT_WORKSPACE.

/*
* This class prints the given message on console.
*/
public class MessageUtil {
   private String message;

   //Constructor
   //@param message to be printed
   public MessageUtil(String message){
      this.message = message; 
   }

   // prints the message
   public String printMessage(){
      System.out.println(message);
      return message;
   }   

   // add "Hi!" to the message
   public String salutationMessage(){
      message = "Hi!" + message;
      System.out.println(message);
      return message;
   }   
} 

Create Test Case Classes

Create a java class file named TestJunit1.java in C:\>JUNIT_WORKSPACE.

import org.junit.Test;
import org.junit.Ignore;
import static org.junit.Assert.assertEquals;

public class TestJunit1 {
   String message = "Robert";
   MessageUtil messageUtil = new MessageUtil(message);
   
   @Test
   public void testPrintMessage() {
      System.out.println("Inside testPrintMessage()");    
      assertEquals(message, messageUtil.printMessage());     
   }
}

Create a java class file named TestJunit2.java in C:\>JUNIT_WORKSPACE.

import org.junit.Test;
import org.junit.Ignore;
import static org.junit.Assert.assertEquals;

public class TestJunit2 {

   String message = "Robert";
   MessageUtil messageUtil = new MessageUtil(message);
 
   @Test
   public void testSalutationMessage() {
      System.out.println("Inside testSalutationMessage()");
      message = "Hi!" + "Robert";
      assertEquals(message,messageUtil.salutationMessage());
   }
}

Create Test Suite Class

• Create a java class.
• Attach @RunWith(Suite.class) Annotation with the class.
• Add reference to JUnit test classes using @Suite.SuiteClasses annotation.

Create a java class file named TestSuite.java in C:\>JUNIT_WORKSPACE to execute test case(s).

import org.junit.runner.RunWith;
import org.junit.runners.Suite;

@RunWith(Suite.class)
@Suite.SuiteClasses({ TestJunit1.class, TestJunit2.class })
public class JunitTestSuite {   

} 

Create Test Runner Class

Create a java class file named TestRunner.java in C:\>JUNIT_WORKSPACE to execute test case(s).

import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;

public class TestRunner {

   public static void main(String[] args) {

      Result result = JUnitCore.runClasses(JunitTestSuite.class);
      for (Failure failure : result.getFailures()) {
         System.out.println(failure.toString());
      }

      System.out.println(result.wasSuccessful());
   }
} 

Compile all the java classes using javac.

C:\JUNIT_WORKSPACE>javac MessageUtil.java TestJunit1.java 

TestJunit2.java JunitTestSuite.java TestRunner.java

Now run the Test Runner, which will run the test case defined in the provided Test Case class.

C:\JUNIT_WORKSPACE>java TestRunner

Verify the output.

Inside testPrintMessage()

Robert

Inside testSalutationMessage()

Hi Robert

true