}
        };
    ScheduledFuture<?> future =
        TestingExecutors.noOpScheduledExecutor().schedule(task, 10, MILLISECONDS);
    Thread.sleep(20);
    assertFalse(taskDone);
    assertFalse(future.isDone());
  }

  public void testNoOpScheduledExecutorShutdown() {
    ListeningScheduledExecutorService executor = TestingExecutors.noOpScheduledExecutor();
    assertFalse(executor.isShutdown());

   * 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

            }
            throw e;
        }
        return true;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.DirFileEntryEnumIteratorBase#isDone()
     */
    @Override
    protected boolean isDone () {
        return false;
    }


    /**
     * @throws CIFSException
     */
    @Override
    protected void doCloseInternal () throws CIFSException {

                  assertTrue(future.isDone());
                  assertEquals(1, threadLocalCount.get().intValue());
                } catch (Throwable t) {
                  throwableFromOtherThread.set(t);
                }
              }
            });

    otherThread.start();

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

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

  public void testSetFutureNull() throws Exception {
    assertThrows(NullPointerException.class, () -> future.setFuture(null));

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

            isInterruptibleRegistered.countDown();
            new CountDownLatch(1).await(); // the interrupt will wake us up
            return null;
          }

          @Override
          boolean isDone() {
            return false;
          }

          @Override
          String toPendingString() {
            return "";
          }

          @Override

    out = null;

    // times out and throws RuntimeException on failure
    GcFinalization.awaitDone(
        new GcFinalization.FinalizationPredicate() {
          @Override
          public boolean isDone() {
            return !file.exists();
          }
        });
  }

                  assertTrue(future.isDone());
                  assertEquals(1, threadLocalCount.get().intValue());
                } catch (Throwable t) {
                  throwableFromOtherThread.set(t);
                }
              }
            });

    otherThread.start();

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

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}.
   */

/**
 * A {@link Future} that accepts completion listeners. Each listener has an associated executor, and
 * it is invoked using this executor once the future's computation is {@linkplain Future#isDone()
 * complete}. If the computation has already completed when the listener is added, the listener will
 * execute immediately.
 *
 * <p>See the Guava User Guide article on <a