code: def test_check_os_kernel_no_warning_when_not_linux(self):
      # system must be Linux
      with patch(
          "platform.uname",
          return_value=Mock(
              release="5.4.0-35-generic", system="Darwin"
          ),
      ):
          with warnings.catch_warnings(record=True) as w:
              check_os_kernel()
          self.assertEqual(len(w), 0)
  
imports: import os
  import pickle
  import tempfile
  import unittest
  import warnings
  from collections import UserDict, namedtuple
  from unittest.mock import Mock, patch
  import torch
  from torch import nn
  from accelerate.state import PartialState
  from accelerate.test_utils.testing import require_cuda, require_torch_min_version
  from accelerate.test_utils.training import RegressionModel
  from accelerate.utils import CannotPadNestedTensorWarning, check_os_kernel, convert_outputs_to_fp32, extract_model_from_parallel, find_device, listify, pad_across_processes, patch_environment, recursively_apply, save, send_to_device
label_desc: Use image node_id 14 for calling the UtilsTester obj's underlying member method code with example usage: obj.test_check_os_kernel_no_warning_when_not_linux() without return types