// one task to drop, succeeds after dropping it
  public void testAddToScheduleOkAfterDrops() {
    log.debug("testAddToScheduleOkAfterDrops()");
    ConfigurationUtil.addFromArgs(
        TaskRunner.PARAM_DROP_TASK_MAX, "10", TaskRunner.PARAM_MIN_CLEANUP_INTERVAL, "0");
    StepTask t1 = task(100, 200, 50);
    StepTask t2 = task(100, 200, 100);
    Schedule sched1 = sched(ListUtil.list(t1));
    Schedule sched2 = sched(ListUtil.list(t2));
    fact.setResults(ListUtil.list(sched1, null, null, sched2, sched2));
    TimeBase.step(101);
    assertTrue(tr.addToSchedule(t1));
    assertIsomorphic(ListUtil.list(t1), fact.scheduler.tasks);
    assertEquals(SetUtil.set(t1), SetUtil.theSet(tr.getAcceptedTasks()));
    assertForegroundStat(1, TaskRunner.STAT_ACCEPTED);
    assertForegroundStat(0, TaskRunner.STAT_REFUSED);
    assertForegroundStat(1, TaskRunner.STAT_WAITING);
    assertForegroundStat(0, TaskRunner.STAT_DROPPED);

    assertTrue(tr.addToSchedule(t2));
    assertEquals(
        ListUtil.list(
            ListUtil.list(t1),
            ListUtil.list(t1, t2),
            ListUtil.list(t1),
            Collections.EMPTY_SET,
            ListUtil.list(t1, t2)),
        fact.createArgs);
    assertEquals(SetUtil.set(t1, t2), SetUtil.theSet(fact.scheduler.tasks));
    assertTrue(t1.isDropped());
    assertEquals(sched2, tr.getCurrentSchedule());
    assertEquals(SetUtil.set(t1, t2), SetUtil.theSet(tr.getAcceptedTasks()));
    assertEquals(SetUtil.set(t1), SetUtil.theSet(tr.getOverrunTasks()));
    assertForegroundStat(2, TaskRunner.STAT_ACCEPTED);
    assertForegroundStat(0, TaskRunner.STAT_REFUSED);
    assertForegroundStat(1, TaskRunner.STAT_WAITING);
    assertForegroundStat(1, TaskRunner.STAT_DROPPED);

    t2.cancel();
    assertForegroundStat(2, TaskRunner.STAT_ACCEPTED);
    assertForegroundStat(0, TaskRunner.STAT_REFUSED);
    assertForegroundStat(0, TaskRunner.STAT_WAITING);
    assertForegroundStat(1, TaskRunner.STAT_DROPPED);
    assertForegroundStat(1, TaskRunner.STAT_CANCELLED);
  }
  // one task not ready to start yet, so not droppable
  public void testAddToScheduleFailNoDroppable() {
    log.debug("testAddToScheduleOkAfterDrops()");
    ConfigurationUtil.addFromArgs(
        TaskRunner.PARAM_DROP_TASK_MAX, "10", TaskRunner.PARAM_MIN_CLEANUP_INTERVAL, "0");
    StepTask t1 = task(100, 200, 50);
    StepTask t2 = task(100, 200, 100);
    Schedule sched1 = sched(ListUtil.list(t1));
    Schedule sched2 = sched(ListUtil.list(t2));
    fact.setResults(ListUtil.list(sched1, null, null, sched2, sched2));
    assertTrue(tr.addToSchedule(t1));
    assertIsomorphic(ListUtil.list(t1), fact.scheduler.tasks);
    assertEquals(SetUtil.set(t1), SetUtil.theSet(tr.getAcceptedTasks()));

    assertFalse(tr.addToSchedule(t2));
    assertEquals(
        ListUtil.list(ListUtil.list(t1), ListUtil.list(t1, t2), ListUtil.list(t1)),
        fact.createArgs);
    assertEquals(SetUtil.set(t1), SetUtil.theSet(fact.scheduler.tasks));
    assertFalse(t1.isDropped());
    assertEquals(sched1, tr.getCurrentSchedule());
    assertEquals(SetUtil.set(t1), SetUtil.theSet(tr.getAcceptedTasks()));
    assertEmpty(SetUtil.theSet(tr.getOverrunTasks()));
  }