assertFalse(future.isCancelled());
    assertEquals("foo", future.get());
  }

  private static class Foo {}

  private static class FooChild extends Foo {}

  public void testSetFuture_genericsHierarchy() throws Exception {
    SettableFuture<Foo> future = SettableFuture.create();
    SettableFuture<FooChild> nested = SettableFuture.create();
    assertTrue(future.setFuture(nested));