AtomicBoolean interruptedExceptionThrown = new AtomicBoolean();
    CountDownLatch enterLatch = new CountDownLatch(1);
    CountDownLatch exitLatch = new CountDownLatch(1);
    TrustedListenableFutureTask<Integer> task =
        TrustedListenableFutureTask.create(
            () -> {
              enterLatch.countDown();
              try {
                new CountDownLatch(1).await(); // wait forever
                throw new AssertionError();

  }

  private static class SingleCallListener implements Runnable {

    private boolean expectCall = false;
    private final CountDownLatch calledCountDown = new CountDownLatch(1);

    @Override
    public void run() {
      assertTrue("Listener called before it was expected", expectCall);
      assertFalse("Listener called more than once", wasCalled());

  public void testRunOnPopulatedList() throws Exception {
    Executor exec = newCachedThreadPool();
    CountDownLatch countDownLatch = new CountDownLatch(3);
    list.add(new MockRunnable(countDownLatch), exec);
    list.add(new MockRunnable(countDownLatch), exec);
    list.add(new MockRunnable(countDownLatch), exec);
    assertEquals(3L, countDownLatch.getCount());

    list.execute();

    SettableFuture<String> input = SettableFuture.create();
    CountDownLatch inFunction = new CountDownLatch(1);
    CountDownLatch shouldCompleteFunction = new CountDownLatch(1);
    CountDownLatch gotException = new CountDownLatch(1);
    AsyncFunction<String, String> function =
        unused -> {
          inFunction.countDown();
          try {

    SettableFuture<String> input = SettableFuture.create();
    CountDownLatch inFunction = new CountDownLatch(1);
    CountDownLatch shouldCompleteFunction = new CountDownLatch(1);
    CountDownLatch gotException = new CountDownLatch(1);
    AsyncFunction<String, String> function =
        unused -> {
          inFunction.countDown();
          try {

        int numThreads = 8;
        int eventsPerThread = 200;
        ExecutorService executor = Executors.newFixedThreadPool(numThreads);
        CountDownLatch startLatch = new CountDownLatch(1);
        CountDownLatch doneLatch = new CountDownLatch(numThreads);
        AtomicInteger totalDrained = new AtomicInteger(0);

        for (int t = 0; t < numThreads; t++) {
            final int threadId = t;

  public void testRunOnPopulatedList() throws Exception {
    Executor exec = newCachedThreadPool();
    CountDownLatch countDownLatch = new CountDownLatch(3);
    list.add(new MockRunnable(countDownLatch), exec);
    list.add(new MockRunnable(countDownLatch), exec);
    list.add(new MockRunnable(countDownLatch), exec);
    assertEquals(3L, countDownLatch.getCount());

    list.execute();

    AtomicBoolean interruptedExceptionThrown = new AtomicBoolean();
    CountDownLatch enterLatch = new CountDownLatch(1);
    CountDownLatch exitLatch = new CountDownLatch(1);
    TrustedListenableFutureTask<Integer> task =
        TrustedListenableFutureTask.create(
            () -> {
              enterLatch.countDown();
              try {
                new CountDownLatch(1).await(); // wait forever
                throw new AssertionError();

    static final Set<FinalizableReference> references = newConcurrentHashSet();

    static void register(Object referent, CountDownLatch latch) {
      references.add(new FinalizableReference(referent, latch));
    }

    final CountDownLatch latch;

    FinalizableReference(Object referent, CountDownLatch latch) {
      super(referent, referenceQueue);
      this.latch = latch;
    }

    @Override

  // Regression test for a deadlock where a task could be stuck busy waiting for the task to
  // transition to DONE
  public void testInterruptThrows() throws Exception {
    CountDownLatch isInterruptibleRegistered = new CountDownLatch(1);
    SettableFuture<String> taskResult = SettableFuture.create();
    InterruptibleTask<String> task =
        new InterruptibleTask<String>() {
          @Override