public void testCreate() throws Exception {
    SettableFuture<Integer> future = SettableFuture.create();
    assertFalse(future.isDone());
    assertFalse(future.isCancelled());
  }

  public void testSetValue_simpleThreaded() throws Exception {
    SettableFuture<Integer> future = SettableFuture.create();
    assertTrue(future.set(42));
    // Later attempts to set the future should return false.
    assertFalse(future.set(23));