select {
		case <-C:
			done <- true
		case <-stop:
		}
		close(done2)
	}()
	Sleep(sched)
	notDone(done)
	tim.Reset(sched / 2)
	Sleep(sched)
	waitDone(done)
	tim.Stop()
	close(stop)
	waitDone(done1)
	waitDone(done2)
	if isTicker {
		// extra send might have sent done again
		// (handled by buffering done above).
		select {
		default:
		case <-done:
		}

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

  public void testAwaitDone_Future_Cancel() {
    final SettableFuture<@Nullable Void> future = SettableFuture.create();

    frq = null;
  }


  public void testFinalizeReferentCalled() {
    final MockReference reference = new MockReference(frq = new FinalizableReferenceQueue());

    GcFinalization.awaitDone(
        new GcFinalization.FinalizationPredicate() {
          @Override
          public boolean isDone() {
            return reference.finalizeReferentCalled;
          }
        });
  }