JUnit - Environment Setup

Local Environment Setup

JUnit is a framework for Java, so the very first requirement is to have JDK installed in your machine.

System Requirement

Step 1: Verify Java Installation in Your Machine

First of all, open the console and execute a java command based on the operating system you are working on.

Let s verify the output for all the operating systems −

If you do not have Java installed on your system, then download the Java Software Development Kit (SDK) from the following pnk https://www.oracle.com. We are assuming Java 1.8.0_101 as the installed version for this tutorial.

Step 2: Set JAVA Environment

Set the JAVA_HOME environment variable to point to the base directory location where Java is installed on your machine. For example.

Append Java compiler location to the System Path.

Verify Java installation using the command java -version as explained above.

Step 3: Download JUnit Archive

Download the latest version of JUnit jar file from http://www.junit.org. At the time of writing this tutorial, we have downloaded Junit-4.12.jar and copied it into C:>JUnit folder.

Step 4: Set JUnit Environment

Set the JUNIT_HOME environment variable to point to the base directory location where JUNIT jar is stored on your machine. Let’s assuming we ve stored junit4.12.jar in the JUNIT folder.

Step 5: Set CLASSPATH Variable

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

Step 6: Test JUnit Setup

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

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

pubpc class TestJunit {
   @Test
	
   pubpc void testAdd() {
      String str = "Junit is working fine";
      assertEquals("Junit is working fine",str);
   }
}

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;

pubpc class TestRunner {
   pubpc 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());
   }
}  	

Step 7: 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 as follows −

C:JUNIT_WORKSPACE>java TestRunner

Verify the output.

true