docstr: Tests the git commit id from the git command is returned
  if neither MXNET_SHA nor GIT_COMMIT env vars are set
docstr_tok: ["Tests","the","git","commit","id","from","the","git","command","is","returned","if","neither","MXNET_SHA","nor","GIT_COMMIT","env","vars","are","set"]
code: def test_probe_commit_id_git_cmd(self, mock):
      """
      Tests the git commit id from the git command is returned
      if neither MXNET_SHA nor GIT_COMMIT env vars are set
      """
      mock.return_value = "abcd1234"
      self.assertEqual(probe_commit_id(), "abcd1234")
  
imports: import unittest
  from unittest.mock import MagicMock, mock_open, patch
  from artifact_repository import *
label_desc: Use image node_id 5 for calling the TestArtifactRepositoryTool obj's underlying member method code with example usage: obj.test_probe_commit_id_git_cmd(mock) without return types