new_contents: from unittest import TestCase
  from unittest.mock import MagicMock, patch
  from sys import modules
  
  
  class TestLiveSync(TestCase):
      @patch('nativescript-plugin.toggle_livesync_command.ToggleLiveSyncNsCommand.on_finished', side_effect=lambda succeded: None)
      def test_toggle_livesync_command_when_project_is_none_should_return_none(self, on_finished):
          toggle_livesync_command = modules["nativescript-plugin.toggle_livesync_command"].ToggleLiveSyncNsCommand()
          self.assertIsNone(toggle_livesync_command.execute(None, {}))
  
      @patch('nativescript-plugin.toggle_livesync_command.ToggleLiveSyncNsCommand.on_finished', side_effect=lambda succeded: None)
      def test_toggle_livesync_command_when_device_is_none_should_return_none(self, on_finished):
          toggle_livesync_command = modules["nativescript-plugin.toggle_livesync_command"].ToggleLiveSyncNsCommand()
          self.assertIsNone(toggle_livesync_command.execute("some_project_path", None))
  
      def test_toggle_livesync_command_should_pass_correct_parameters(self):
          device_mock = {"platform": "Android", "identifier": "192.168.56.101:5555"}
          project_path = "some_project_path"
          toggle_livesync_command = modules["nativescript-plugin.toggle_livesync_command"].ToggleLiveSyncNsCommand()
          toggle_livesync_command.run_command = MagicMock()
          toggle_livesync_command.execute(project_path, device_mock)
          toggle_livesync_command.run_command.assert_called_with(["livesync",
                                                                  device_mock["platform"],
                                                                  "--watch",
                                                                  "--path", project_path,
                                                                  "--device",
                                                                  device_mock["identifier"]],
                                                                 False)
  
      def test_toggle_livesync_command_when_called_for_second_time_should_terminate_process(self):
          device_mock = {"platform": "Android", "identifier": "192.168.56.101:5555"}
          project_path = "some_project_path"
          toggle_livesync_command = modules["nativescript-plugin.toggle_livesync_command"].ToggleLiveSyncNsCommand()
          terminate_called = False
  
          class MockThread():
              def terminate(self):
                  nonlocal terminate_called
                  terminate_called = True
  
          mock_thread = MockThread()
          toggle_livesync_command.run_command = MagicMock(return_value=MockThread())
          toggle_livesync_command.execute(project_path, device_mock)
          toggle_livesync_command.run_command.assert_called_with(["livesync",
                                                                  device_mock["platform"],
                                                                  "--watch",
                                                                  "--path", project_path,
                                                                  "--device",
                                                                  device_mock["identifier"]],
                                                                 False)
          toggle_livesync_command.execute(project_path, device_mock)
          self.assertTrue(terminate_called)
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Add tests for Toggle LiveSync command