code: def test_autodetect_num_npus(mock_glob):
      with patch.dict(sys.modules):
          sys.modules["acl"] = None
          mock_glob.return_value = [
              f"/dev/davinci{i}" for i in range(4)
          ]
          assert Accelerator.get_current_node_num_accelerators() == 4
  
file_path: ray/python/ray/tests/accelerators/test_npu.py
imports: import os
  import sys
  import pytest
  from unittest.mock import patch
  import ray
  from ray._private.accelerators import NPUAcceleratorManager
label_desc: Use image node_id 1 for calling a global function with example usage: test_autodetect_num_npus(mock_glob) without return types