AlarmClock alarmClock = new AlarmClock() ;
assertEquals(0, alarmClock.getCount()) ;
// Very long - never happens.
Pingback<?> ping = alarmClock.add(callback, 10000000) ;
assertEquals(1, alarmClock.getCount()) ;
alarmClock.cancel(ping) ;
assertEquals(0, alarmClock.getCount()) ;
}
@Test public void alarm_02()
{