JUnit - Ignore Test

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Sometimes it happens that our code is not ready and test case written to test that method/code will fail if run. The @Ignore annotation helps in this regards.

  • A test method annotated with @Ignore will not be executed.

  • If a test class is annotated with @Ignore then none of its test methods will be executed.

Now let's see @Ignore in action.

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 Class

  • Create a java test class say TestJunit.java.

  • Add a test methods testPrintMessage(),testSalutationMessage() to your test class.

  • Add an Annotaion @Ignore to method testPrintMessage().

Create a java class file name TestJunit.java in C:\ > JUNIT_WORKSPACE

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

public class TestJunit {

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

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

Create Test Runner Class

Create a java class file name 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(TestJunit.class);
      for (Failure failure : result.getFailures()) {
         System.out.println(failure.toString());
      }
      System.out.println(result.wasSuccessful());
   }
}  	

Compile the MessageUtil, Test case and Test Runner classes using javac

C:\JUNIT_WORKSPACE>javac MessageUtil.java TestJunit.java TestRunner.java

Now run the Test Runner which will not run testPrintMessage() test case defined in provided Test Case class.

C:\JUNIT_WORKSPACE>java TestRunner

Verify the output. testPrintMessage() test case is not tested.

Inside testSalutationMessage()
Hi!Robert
true

Now update TestJunit in C:\ > JUNIT_WORKSPACE to ignore all test cases. Add @Ignore at class level

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

@Ignore
public class TestJunit {

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

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

Compile the Test case using javac

C:\JUNIT_WORKSPACE>javac TestJunit.java

Keep your Test Runner unchnaged as follows

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(TestJunit.class);
      for (Failure failure : result.getFailures()) {
         System.out.println(failure.toString());
      }
      System.out.println(result.wasSuccessful());
   }
}

Now run the Test Runner which will not run any test case defined in provided Test Case class.

C:\JUNIT_WORKSPACE>java TestRunner

Verify the output. No test case is tested.

true


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