code: def test_autodetect_invalid_type(mock_os, mock_request, test_case):
      gce_or_gke, accelerator_type = test_case
      if gce_or_gke == "gce":
          mock_response = mock.MagicMock()
          mock_response.status_code = 200
          mock_response.text = accelerator_type
          mock_request.return_value = mock_response
          mock_os.return_value = None
      else:
          mock_os.return_value = accelerator_type
      assert (
          TPUAcceleratorManager.get_current_node_accelerator_type()
          is None
      )
  
imports: import os
  import sys
  import mock
  import pytest
  import requests
  from unittest.mock import patch
  import ray
  from ray._private.accelerators import TPUAcceleratorManager
  from ray._private.accelerators import tpu
label_desc: Use image node_id 7 for calling a global function with example usage: test_autodetect_invalid_type(mock_os, mock_request, test_case) without return types