public IEnumerator getRemainedTimeTest()
        {
            SyncTriggerSystem system = createSystem();
            SyncTask          task   = system.request(1, new EventContext("discover")
            {
                { "cards", new int[] { 1, 2, 3 } }
            }, 3, ALambda.doNothing);

            yield return(new WaitForSeconds(1));

            Assert.True(1 < system.getRemainedTime(task) && system.getRemainedTime(task) <= 2);

            yield return(new WaitForSeconds(3));

            Assert.AreEqual(0, system.getRemainedTime(task));
        }