code: def test_search_files(tmp_path, fname, extension):
      tmp_fname = fname + extension
      test_file = tmp_path / tmp_fname
      test_file.touch()
      actual_files_list = dcm2nii.search_files(
          str(tmp_path / fname), [extension]
      )
      for f in actual_files_list:
          assert str(test_file) == f
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_search_files(tmp_path, fname, extension) without return types