code: public void testQueryByDuedateLowerThan(){
    JobQuery query=managementService.createJobQuery().duedateLowerThan(testStartTime);
    verifyQueryResults(query,0);
    TimerJobQuery timerQuery=managementService.createTimerJobQuery().duedateLowerThan(testStartTime);
    verifyQueryResults(timerQuery,0);
    timerQuery=managementService.createTimerJobQuery().duedateLowerThan(new Date(timerOneFireTime.getTime() + ONE_SECOND));
    verifyQueryResults(timerQuery,1);
    timerQuery=managementService.createTimerJobQuery().duedateLowerThan(new Date(timerTwoFireTime.getTime() + ONE_SECOND));
    verifyQueryResults(timerQuery,2);
    timerQuery=managementService.createTimerJobQuery().duedateLowerThan(new Date(timerThreeFireTime.getTime() + ONE_SECOND));
    verifyQueryResults(timerQuery,3);
  }
  