manager.stopAsync();
    assertThrows(TimeoutException.class, () -> manager.awaitStopped(1, TimeUnit.MILLISECONDS));
    manager.awaitStopped(5, SECONDS); // no exception thrown
  }

  /**
   * This covers a case where if the last service to stop failed then the stopped callback would
   * never be called.
   */
  public void testSingleFailedServiceCallsStopped() {
    Service a = new FailStartService();

    manager.stopAsync();
    assertThrows(TimeoutException.class, () -> manager.awaitStopped(1, TimeUnit.MILLISECONDS));
    manager.awaitStopped(5, SECONDS); // no exception thrown
  }

  /**
   * This covers a case where if the last service to stop failed then the stopped callback would
   * never be called.
   */
  public void testSingleFailedServiceCallsStopped() {
    Service a = new FailStartService();