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

      }
    };


    private GroovyWorkerRunnable(GrinderContextExecutor groovyRunner) throws EngineException {
      this.m_groovyThreadRunner = groovyRunner;
      this.notifier.addListener(new RunListener() {
        @Override
        public void testFailure(Failure failure) throws Exception {
          // Skip Generic Shutdown... It's not failure.
          Throwable rootCause = exceptionProcessor.getRootCause(failure.getException());
          if (exceptionProcessor.isGenericShutdown(rootCause)) {

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   }


   @Override
   public void run(RunNotifier notifier)
   {
      notifier.addListener(new RunListener()
      {
         @Override
         public void testRunFinished(Result result) throws Exception
         {
            try

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            return instance;
  }
  
  public RunNotifier getNotifier(final TestResult result) {
            RunNotifier notifier = new RunNotifier();
            notifier.addListener(new RunListener() {
                    public void testFailure(Failure failure) throws Exception {
                        result.addError(asTest(failure.getDescription()),
                                        failure.getException());
                    }

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    }


    private void beforeRun(RunNotifier notifier, final DebuggingInfo debuggingInfo) {
        debuggingInfo.collectData();


        RunListener listener = new RunListener() {
            @Override public void testFailure(Failure failure) throws Exception {
                debuggingInfo.printWarnings(logger);
            }
        };

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        System.out.println("Could not find class: " + each);
        Description description= Description.createSuiteDescription(each);
        Failure failure= new Failure(description, e);
        missingClasses.add(failure);
      }
    RunListener listener= new TextListener();
    addListener(listener);
    Result result= run(classes.toArray(new Class[0]));
    for (Failure each : missingClasses)
      result.getFailures().add(each);
    return result;

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  /**
   * Do not use. Testing purposes only.
   */
  public Result run(Runner runner) {
    Result result= new Result();
    RunListener listener= result.createListener();
    addFirstListener(listener);
    try {
      fNotifier.fireTestRunStarted(runner.getDescription());
      runner.run(fNotifier);
      fNotifier.fireTestRunFinished(result);

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  @Test
  public void testMaxFailures() {
    LuceneTestCase.replaceMaxFailureRule(new TestRuleIgnoreAfterMaxFailures(2));
    JUnitCore core = new JUnitCore();
    final StringBuilder results = new StringBuilder();
    core.addListener(new RunListener() {
      char lastTest;


      @Override
      public void testStarted(Description description) throws Exception {
        lastTest = 'S'; // success.

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  @Test
  public void testZombieThreadFailures() throws Exception {
    LuceneTestCase.replaceMaxFailureRule(new TestRuleIgnoreAfterMaxFailures(1));
    JUnitCore core = new JUnitCore();
    final StringBuilder results = new StringBuilder();
    core.addListener(new RunListener() {
      char lastTest;


      @Override
      public void testStarted(Description description) throws Exception {
        lastTest = 'S'; // success.

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    public CustomJUnitRunNotifier( final Event<TestResultMessage> testResultMessageEvent ) {


        this.testResultMessageEvent = testResultMessageEvent;


        addListener( new RunListener() {


            private boolean hasFailure = false;


            public void testFinished( final Description description ) throws Exception {
                if ( !hasFailure ) {

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                warn("Event serializer exception.", t);
              }
            }));


    if (flushFrequently) {
      core.addListener(new RunListener() {
        public void testRunFinished(Result result) throws Exception {
          serializer.flush();
        }
        
        public void testFinished(Description description) throws Exception {

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