code: def test_probe_operating_system_linux(self, mock_props, mock_sys):
      mock_props.return_value = {"ID": "ubuntu", "VERSION_ID": "16.04"}
  
      mock_sys.platform = "linux"
      self.assertEqual(probe_operating_system(), "ubuntu16.04")
  
      # sys.platform can return linux or linux2
      mock_sys.platform = "linux2"
      self.assertEqual(probe_operating_system(), "ubuntu16.04")
  
imports: import unittest
  from unittest.mock import MagicMock, mock_open, patch
  from artifact_repository import *
label_desc: Use image node_id 10 for calling the TestArtifactRepositoryTool obj's underlying member method code with example usage: obj.test_probe_operating_system_linux(mock_props, mock_sys) without return types