code: def test_module_lacks_client_builder():
      mock_importlib = Mock()
  
      def mock_import_module(module_string):
          if module_string == "ray":
              return ray
          else:
              # Mock() does not have a `ClientBuilder` in its scope
              return Mock()
  
      mock_importlib.import_module = mock_import_module
      with patch("ray.client_builder.importlib", mock_importlib):
          assert isinstance(ray.client(""), ray.ClientBuilder)
          assert isinstance(ray.client("ray://"), ray.ClientBuilder)
          exception = None
          try:
              ray.client("othermodule://")
          except AssertionError as e:
              exception = e
          assert (
              exception is not None
          ), "Module without ClientBuilder did not raise AssertionError"
          assert "does not have ClientBuilder" 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 7 for calling a global function with example usage: test_module_lacks_client_builder() and returns: ray, Mock