How to setup JUnit ?

1. Ensure Java is installed and JAVA_HOME environment variable is set to point to the base directory location where Java is installed.

2. Download latest version of JUnit jar file from http://www.junit.org.

3. Set the JUNIT_HOME environment variable to point to the base directory location where JUNIT jar is stored.

  Windows : Set the environment variable JUNIT_HOME to C:\JUNIT

  Linux : export JUNIT_HOME= /usr/local/JUNIT

  Mac : export JUNIT_HOME= /Library/JUNIT

4. Set the CLASSPATH environment variable to point to the JUNIT jar location.

  Windows : Set the environment variable CLASSPATH to %CLASSPATH%;%JUNIT_HOME%\junit4.10.jar;.;

  Linux : export CLASSPATH=$CLASSPATH:$JUNIT_HOME/junit4.10.jar:.

  Mac : export CLASSPATH=$CLASSPATH:$JUNIT_HOME/junit4.10.jar:.

Setup is done. Next step to test the setup.

Test JUnit setup

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

import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class TestJunit {

   @Test

   public void testAdd() {

      String str= "Junit is working fine";

      assertEquals("Junit is working fine", str);

   }

}

2. Create a java class file name TestRunner 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());

   }

}      

3. Verify the Result

Compile the classes using javac compiler as follows

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

Now run the Test Runner to see the result

C:\JUNIT_WORKSPACE>java TestRunner

Verify the output

true