code: def test_client_connect_to_tls_server(use_tls, call_ray_start):
      tls_env = (
          build_env()
      )  # use_tls fixture sets TLS environment variables
      without_tls_env = {
          k: v for k, v in tls_env.items() if "TLS" not in k
      }
  
      # Attempt to connect without TLS
      with pytest.raises(subprocess.CalledProcessError) as exc_info:
          run_string_as_driver(
              """
  from ray.util.client import ray as ray_client
  ray_client.connect("localhost:10001")
       """,
              env=without_tls_env,
          )
      assert "ConnectionError" in exc_info.value.output.decode("utf-8")
  
      # Attempt to connect with TLS
      run_string_as_driver(
          """
  import ray
  from ray.util.client import ray as ray_client
  ray_client.connect("localhost:10001")
  assert ray.is_initialized()
       """,
          env=tls_env,
      )
  
file_path: ray/python/ray/tests/test_tls_auth.py
imports: import logging
  import os
  import sys
  import subprocess
  import pytest
  from ray._private.test_utils import run_string_as_driver
label_desc: Use image node_id 5 for calling a global function with example usage: test_client_connect_to_tls_server(use_tls, call_ray_start) without return types