Google\Cloud\Tests\Datastore\KeyTest::testAncestorKeyIncompletePath PHP Method

    public function testAncestorKeyIncompletePath()
    {
        $ancestor = $this->prophesize(Key::class);
        $ancestor->state()->willReturn(Key::STATE_INCOMPLETE);
        $key = new Key('foo');
        $key->ancestorKey($ancestor->reveal());
    }