Examples of org.junit.runner.notification.RunListener

org.junit.runner.notification.RunListener
Register an instance of this class with {@link RunNotifier} to be notifiedof events that occur during a test run. All of the methods in this class are abstract and have no implementation; override one or more methods to receive events.
For example, suppose you have a Cowbell class that you want to make a noise whenever a test fails. You could write:
```
 public class RingingListener extends RunListener { public void testFailure(Failure failure) { Cowbell.ring(); } } 
```
To invoke your listener, you need to run your tests through JUnitCore.
```
 public void main(String... args) { JUnitCore core= new JUnitCore(); core.addListener(new RingingListener()); core.run(MyTestClass.class); } 
```
If a listener throws an exception for a test event, the other listeners will have their {@link RunListener#testFailure(Failure)} called with a {@code Description}of {@link Description#TEST_MECHANISM} to indicate the failure.
By default, JUnit will synchronize calls to your listener. If your listener is thread-safe and you want to allow JUnit to call your listener from multiple threads when tests are run in parallel, you can annotate your test class with {@link RunListener.ThreadSafe}.
Listener methods will be called from the same thread as is running the test, unless otherwise indicated by the method Javadoc @see org.junit.runner.JUnitCore @since 4.0

  /** Subscribe annotation listeners to the notifier. */
  private void subscribeListeners(RunNotifier notifier) {
    for (Listeners ann : getAnnotationsFromClassHierarchy(suiteClass, Listeners.class)) {
      for (Class<? extends RunListener> clazz : ann.value()) {
        try {
          RunListener listener = clazz.newInstance();
          autoListeners.add(listener);
          notifier.addListener(listener);
        } catch (Throwable t) {
          throw new RuntimeException("Could not initialize suite class: "
              + suiteClass.getName() + " because its @Listener is not instantiable: "

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  }




  private Result run(Runner runner) {
    Result result = new Result();
    RunListener listener = result.createListener();
    notifier.addFirstListener(listener);
    notifier.addListener(swRunListener);


    try {
      notifier.fireTestRunStarted(runner.getDescription());

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   * Test execution logic for the entire suite, executing under designated
   * {@link RunnerThreadGroup}.
   */
  private void runSuite(final RandomizedContext context, final RunNotifier notifier) {
    final Result result = new Result();
    final RunListener accounting = result.createListener();
    notifier.addListener(accounting);


    final Randomness classRandomness = runnerRandomness.clone(Thread.currentThread());
    context.push(classRandomness);
    try {

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  /** Subscribe annotation listeners to the notifier. */
  private void subscribeListeners(RunNotifier notifier) {
    for (Listeners ann : getAnnotationsFromClassHierarchy(suiteClass, Listeners.class)) {
      for (Class<? extends RunListener> clazz : ann.value()) {
        try {
          RunListener listener = clazz.newInstance();
          autoListeners.add(listener);
          notifier.addListener(listener);
        } catch (Throwable t) {
          throw new RuntimeException("Could not initialize suite class: "
              + suiteClass.getName() + " because its @Listener is not instantiable: "

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   * Test execution logic for the entire suite, executing under designated
   * {@link RunnerThreadGroup}.
   */
  private void runSuite(final RandomizedContext context, final RunNotifier notifier) {
    final Result result = new Result();
    final RunListener accounting = result.createListener();
    notifier.addListener(accounting);


    final Randomness classRandomness = runnerRandomness.clone(Thread.currentThread());
    context.push(classRandomness);
    try {

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  /** Subscribe annotation listeners to the notifier. */
  private void subscribeListeners(RunNotifier notifier) {
    for (Listeners ann : getAnnotationsFromClassHierarchy(suiteClass, Listeners.class)) {
      for (Class<? extends RunListener> clazz : ann.value()) {
        try {
          RunListener listener = clazz.newInstance();
          autoListeners.add(listener);
          notifier.addListener(listener);
        } catch (Throwable t) {
          throw new RuntimeException("Could not initialize suite class: "
              + suiteClass.getName() + " because its @Listener is not instantiable: "

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   * Test execution logic for the entire suite, executing under designated
   * {@link RunnerThreadGroup}.
   */
  private void runSuite(final RandomizedContext context, final RunNotifier notifier) {
    final Result result = new Result();
    final RunListener accounting = result.createListener();
    notifier.addListener(accounting);


    final Randomness classRandomness = runnerRandomness.clone(Thread.currentThread());
    context.push(classRandomness);
    try {

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  /** Subscribe annotation listeners to the notifier. */
  private void subscribeListeners(RunNotifier notifier) {
    for (Listeners ann : getAnnotationsFromClassHierarchy(suiteClass, Listeners.class)) {
      for (Class<? extends RunListener> clazz : ann.value()) {
        try {
          RunListener listener = clazz.newInstance();
          autoListeners.add(listener);
          notifier.addListener(listener);
        } catch (Throwable t) {
          throw new RuntimeException("Could not initialize suite class: "
              + suiteClass.getName() + " because its @Listener is not instantiable: "

View Full Code Here

   * Test execution logic for the entire suite, executing under designated
   * {@link RunnerThreadGroup}.
   */
  private void runSuite(final RandomizedContext context, final RunNotifier notifier) {
    final Result result = new Result();
    final RunListener accounting = result.createListener();
    notifier.addListener(accounting);


    context.push(runnerRandomness);
    try {
      // Check for automatically hookable listeners.

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  /** Subscribe annotation listeners to the notifier. */
  private void subscribeListeners(RunNotifier notifier) {
    for (Listeners ann : getAnnotationsFromClassHierarchy(suiteClass, Listeners.class)) {
      for (Class<? extends RunListener> clazz : ann.value()) {
        try {
          RunListener listener = clazz.newInstance();
          autoListeners.add(listener);
          notifier.addListener(listener);
        } catch (Throwable t) {
          throw new RuntimeException("Could not initialize suite class: "
              + suiteClass.getName() + " because its @Listener is not instantiable: "

View Full Code Here

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