def setUpClass(cls):
        """Initializes a mock HDFS namenode connector to track connection attempts."""
        cls.NAMENODES = [HC.WARP_TURTLE_NN1, HC.WARP_TURTLE_NN2, HC.WARP_TURTLE_NN3]
        cls.suj = MockHdfsConnector()
Initializes a mock HDFS namenode connector to track connection attempts.
petastorm/hdfs/tests/test_hdfs_namenode.py