compound.addListener(listener, directExecutor());

    // Satisfy each input and check the output
    assertFalse(compound.isDone());
    future1.set(DATA1);
    assertFalse(compound.isDone());
    future2.set(DATA2);
    assertFalse(compound.isDone());
    listener.expectCall();
    future3.set(DATA3);
    assertTrue(listener.wasCalled());

    List<String> results = getDone(compound);

    // don't execute 'immediately'.  By checking isDone here we avoid that.
    // A corollary to all that is that we don't need to check isDone inside the loop because if we
    // get into the loop we know that we weren't done when we entered and therefore we aren't under
    // an obligation to execute 'immediately'.
    if (!isDone()) {
      Listener oldHead = listeners();

   * returned future will emulate {@link ListenableFuture#addListener} by taking a thread from an
   * internal, unbounded pool at the first call to {@code addListener} and holding it until the
   * future is {@linkplain Future#isDone() done}.
   *
   * <p>Prefer to create {@code ListenableFuture} instances with {@link SettableFuture}, {@link
   * MoreExecutors#listeningDecorator( java.util.concurrent.ExecutorService)}, {@link

    assertThat(future.isDone()).isFalse();
    assertThat(future.set(1)).isTrue();
    assertSuccessful(future, 1);
  }

  @SuppressWarnings("nullness") // test of a bogus call
  public void testSetFutureNull() throws Exception {
    assertThrows(NullPointerException.class, () -> future.setFuture(null));

    assertThat(future.isDone()).isFalse();
    assertThat(future.set(1)).isTrue();

     */
    @CanIgnoreReturnValue
    @Override
    public V get() throws InterruptedException, ExecutionException {
      return sync.get();
    }

    @Override
    public boolean isDone() {
      return sync.isDone();
    }

    @Override
    public boolean isCancelled() {
      return sync.isCancelled();
    }

    @CanIgnoreReturnValue
    @Override

public interface AsyncFunction<I extends @Nullable Object, O extends @Nullable Object> {
  /**
   * Returns an output {@code Future} to use in place of the given {@code input}. The output {@code
   * Future} need not be {@linkplain Future#isDone done}, making {@code AsyncFunction} suitable for
   * asynchronous derivations.
   *
   * <p>Throwing an exception from this method is equivalent to returning a failing {@code Future}.
   */

    assertThat(future.isDone()).isFalse();
    assertThat(future.set(1)).isTrue();
    assertSuccessful(future, 1);
  }

  @SuppressWarnings("nullness") // test of a bogus call
  public void testSetFutureNull() throws Exception {
    assertThrows(NullPointerException.class, () -> future.setFuture(null));

    assertThat(future.isDone()).isFalse();
    assertThat(future.set(1)).isTrue();

          protected void finalize() {
            future.set(null);
          }
        };
    unused = null; // Hint to the JIT that unused is unreachable
    GcFinalization.awaitDone(future);
    assertTrue(future.isDone());
    assertFalse(future.isCancelled());
  }

  public void testAwaitDone_future_cancel() {
    SettableFuture<@Nullable Void> future = SettableFuture.create();
    Object unused =
        new Object() {

              Future<?> future = executor.submit(incrementTask);
              assertTrue(future.isDone());
              assertEquals(1, threadLocalCount.get().intValue());
              return null;
            });
    new Thread(otherTask).start();

    ListenableFuture<?> future = executor.submit(incrementTask);
    assertTrue(future.isDone());
    assertListenerRunImmediately(future);

              Future<?> future = executor.submit(incrementTask);
              assertTrue(future.isDone());
              assertEquals(1, threadLocalCount.get().intValue());
              return null;
            });
    new Thread(otherTask).start();

    ListenableFuture<?> future = executor.submit(incrementTask);
    assertTrue(future.isDone());
    assertListenerRunImmediately(future);