from tensorflow.python.platform import gfile


      s3 = save.save(sess, os.path.join(save_dir, "s3"))
      self.assertEqual([s2, s3], save.last_checkpoints)
      self.assertEqual(0, len(gfile.Glob(s1)))
      self.assertFalse(gfile.Exists(save._MetaGraphFilename(s1)))
      self.assertEqual(2, len(gfile.Glob(s2)))
