delegate.set(5);
    assertThat(future.setFuture(delegate)).isTrue();
    assertSuccessful(future, 5);
  }

  public void testSetFutureDelegateLaterSuccessful() throws Exception {
    assertThat(future.setFuture(delegate)).isTrue();
    delegate.set(6);
    assertSuccessful(future, 6);
  }

  public void testSetFutureDelegateAlreadyCancelled() throws Exception {