JUnit provides a handy option of Timeout. If a test case takes more
time than the specified number of milliseconds, then JUnit will
automatically mark it as failed. The timeout parameter is used along with @Test annotation. Let us see the @Test(timeout) in action.
Add an infinite while loop inside the printMessage() method.
Create a java class file named TestJunit.java in C:\>JUNIT_WORKSPACE.
Create a Class
Create a java class to be tested, say, MessageUtil.java in C:\>JUNIT_WORKSPACE.Add an infinite while loop inside the printMessage() method.
/* * 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 void printMessage(){ System.out.println(message); while(true); } // 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 timeout of 1000 to testPrintMessage() test case.Create a java class file named 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); @Test(timeout = 1000) public void testPrintMessage() { System.out.println("Inside testPrintMessage()"); 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 named 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.javaNow run the Test Runner, which will run the test cases defined in the provided Test Case class.
C:\JUNIT_WORKSPACE>java TestRunnerVerify the output. testPrintMessage() test case will mark the unit testing failed.
Inside testPrintMessage() Robert Inside testSalutationMessage() Hi!Robert testPrintMessage(TestJunit): test timed out after 1000 milliseconds false
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