def test_returns_empty_list_for_no_output(self):
    with mock.patch.object(utils, 'execute', return_value=''):
        self.assertEqual(utils.find_child_pids((- 1)), [])
def test_returns_empty_list_for_no_output(self):
    with mock.patch.object(utils, 'execute', return_value=):
        self.assertEqual(utils.find_child_pids((- 1)), [])