code: def test_non_existent_modules():
      exception = None
      try:
          ray.client("badmodule://address")
      except RuntimeError as e:
          exception = e
  
      assert (
          exception is not None
      ), "Bad Module did not raise RuntimeException"
      assert "does not exist" in str(exception)
  
imports: import os
  import subprocess
  import sys
  import warnings
  from unittest.mock import Mock, patch
  import pytest
  import ray
  import ray.client_builder
  import ray.util.client.server.server
  from ray._private.test_utils import run_string_as_driver, run_string_as_driver_nonblocking, wait_for_condition, skip_flaky_core_test_premerge
  from ray.util.state import list_workers
label_desc: Use image node_id 6 for calling a global function with example usage: test_non_existent_modules() without return types