code: def test_protocol_version(init_and_serve):
      server_handle = init_and_serve
      ray = _ClientContext()
      info1 = ray.connect("localhost:50051")
      local_py_version = ".".join(
          [str(x) for x in list(sys.version_info)[:3]]
      )
      assert (
          info1["protocol_version"] == CURRENT_PROTOCOL_VERSION
      ), info1
      ray.disconnect()
      time.sleep(1)
  
      def mock_connection_response():
          return ray_client_pb2.ConnectionInfoResponse(
              num_clients=1,
              python_version=local_py_version,
              ray_version="",
              ray_commit="",
              protocol_version="2050-01-01",  # from the future
          )
  
      # inject mock connection function
      server_handle.data_servicer._build_connection_response = (
          mock_connection_response
      )
  
      ray = _ClientContext()
      with pytest.raises(RuntimeError):
          _ = ray.connect("localhost:50051")
  
      ray = _ClientContext()
      info3 = ray.connect("localhost:50051", ignore_version=True)
      assert info3["num_clients"] == 1, info3
      ray.disconnect()
  
imports: import pytest
  import time
  import random
  import sys
  import subprocess
  from unittest.mock import patch
  import ray.util.client.server.server
  import ray.core.generated.ray_client_pb2
  from ray.util.client import _ClientContext, CURRENT_PROTOCOL_VERSION
  from ray.cluster_utils import cluster_not_supported
  import ray
label_desc: Use image node_id 9 for calling a global function with example usage: test_protocol_version(init_and_serve) and returns: ray_client_pb2