JUnit - Eclipse plug-in

JUnit - Eclipse plug-in

In order to set up JUnit with eclipse, you need to follow these steps.

Step 1: Download Junit Archive

Download JUnit

Let's say you copied the above JAR file in the C:;JUnit folder.

Step 2: Set up the Eclipse environment

• Open eclipse -gt; right-click on project and click on property and Build Path and Configure Build Path, and then use the External Add Jar button to add junit-4.10 to the library.jar.

• Let's say your eclipse already has a junit plug-in built in and it's in the C:;eclipse/plugins directory, so if you can't get it, you can download it from JUnit Plugin. U nzip the downloaded zip file in eclipse's plug-in folder. F inally restart eclipse.

Now your eclipse is ready for the development of the JUnit test case.

Step 3: Verify the Junit installation in Eclipse

• Create a TestJunit project anywhere on eclipse.
• Create a MessageUtil class to test in your project.

/*
* 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;
   }   
} 

• Create a Test Class TestJunit in your project

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

public class TestJunit {

   String message = "Hello World";  
   MessageUtil messageUtil = new MessageUtil(message);

   @Test
   public void testPrintMessage() {   
      assertEquals(message,messageUtil.printMessage());
   }
}

The following is the project structure

Finally, verify the output of the program by right-clicking the program and run as junit.

Verify the results