docstr: Tests None is returned if the mxnet features could not be extracted from the libmxnet.so file
docstr_tok: ["Tests","None","is","returned","if","the","mxnet","features","could","not","be","extracted","from","the","libmxnet.so","file"]
code: def test_probe_variant_cuda_returns_none_on_no_features(
      self, mock_features
  ):
      """
      Tests None is returned if the mxnet features could not be extracted from the libmxnet.so file
      """
      mock_features.return_value = None
      self.assertIsNone(probe_mxnet_variant("libmxnet.so"))
  
imports: import unittest
  from unittest.mock import MagicMock, mock_open, patch
  from artifact_repository import *
label_desc: Use image node_id 16 for calling the TestArtifactRepositoryTool obj's underlying member method code with example usage: obj.test_probe_variant_cuda_returns_none_on_no_features(mock_features) without return types