def start_and_end_times(self):
        return [(x.node_monitor_launch_time, x.completion_time) for x in self.__tasks.values()
                if x.complete()]
Tests that the function returns successfully.
dataset/ETHPy150Open radlab/sparrow/src/main/python/parse_logs.py/Request.start_and_end_times--crossover with--dataset/ETHPy150Open saltstack/salt/tests/unit/cloud/clouds/opennebula_test.py/OpenNebulaTestCase.test_get_host_id_success