code: def test_client_send_intermittently(self) -> None:
      server = LogStreamingServer()
      server.start()
      time.sleep(1)
      client = LogStreamingClient("localhost", server.port)
      with patch_stderr() as output:
          client._connect()
          # test client send half message first
          client.send("msg part1")
          time.sleep(_SERVER_POLL_INTERVAL + 1)
          # test client send another half message
          client.send(" msg part2")
          time.sleep(_SERVER_POLL_INTERVAL + 1)
          output = output.getvalue()
          self.assertIn("msg part1\n msg part2\n", output)
      client.close()
      server.shutdown()
  
file_path: spark/python/pyspark/ml/torch/tests/test_log_communication.py
imports: from __future__ import absolute_import, division, print_function
  import contextlib
  from io import StringIO
  import sys
  import time
  from typing import Any, Callable
  import unittest
  import pyspark.ml.torch.log_communication
  from pyspark.ml.torch.log_communication import LogStreamingServer, LogStreamingClient, LogStreamingClientBase, _SERVER_POLL_INTERVAL
label_desc: Use image node_id 7 for calling the LogStreamingServiceTestCase obj's underlying member method code with example usage: obj.test_client_send_intermittently() without return types