« Previous | 1 | 2 | 3 | Next »

JUNIT -EXECUTING TESTS

The test cases are executed using JUnitCore class. JUnitCore is a facade for running tests. It supports running JUnit 4 tests, JUnit 3.8.x tests, and mixtures. To run tests from the command line, run java org.junit.runner.JUnitCore <TestClass>. For one-shot test runs, use the static method runClasses(Class[]).

Following is the declaration for org.junit.runner.JUnitCore class:

public class JUnitCore extends java.lang.Object

Here we will see how to execute the tests with the help of JUnitCore.

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;
}
}

Create Test Case Class

Create a java test class, say, TestJunit.java.
Add a test method testPrintMessage() to your test class.
Add an Annotaion @Test to the method testPrintMessage().
Implement the test condition and check the condition using assertEquals API of Junit.

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

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());
}
}

Create Test Runner Class

Now create a java class file named TestRunner.java in C:\> JUNIT_WORKSPACE to execute test case(s). It imports the JUnitCore class and uses the runClasses() method that takes the test class name as its parameter.

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 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 run the test case defined in the provided Test Case class.

C:\JUNIT_WORKSPACE>java TestRunner

Verify the output.

Hello World
true

« Previous | 1 | 2 | 3 | Next »

The largest Interview Solution Library on the web

JUNIT -EXECUTING TESTS