'Check results of flow.'

def CheckFlow(self):

    fd = aff4.FACTORY.Open(self.client_id.Add(self.test_output_path), token=self.token)
    hash_obj = fd.Get(fd.Schema.HASH)
    self.assertNotEqual(hash_obj, None)
    self.assertEqual(len(hash_obj.md5), 16)
    self.assertEqual(len(hash_obj.sha1), 20)
    self.assertEqual(len(hash_obj.sha256), 32)
