@Test
public void testHudsonCeil() throws ANTLRException {
  final Calendar cal = Calendar.getInstance();
  cal.set(2011, 0, 16, 0, 0, 0); // Sunday, Jan 16th 2011, 00:00
  final String cronStr = "0 23 * * 1-5"; // execute on weekdays @23:00
  final CronTab cron = new CronTab(cronStr);
  final Calendar next = cron.ceil(cal);
  final Calendar expectedDate = Calendar.getInstance();
  expectedDate.set(2011, 0, 17, 23, 0, 0); // Expected next: Monday, Jan 17th 2011, 23:00
  Assert.assertEquals(expectedDate.get(Calendar.HOUR), next.get(Calendar.HOUR));
  Assert.assertEquals(expectedDate.get(Calendar.MINUTE), next.get(Calendar.MINUTE));
  Assert.assertEquals(expectedDate.get(Calendar.YEAR), next.get(Calendar.YEAR));
  Assert.assertEquals(expectedDate.get(Calendar.MONTH), next.get(Calendar.MONTH));
  Assert.assertEquals(expectedDate.get(Calendar.DAY_OF_MONTH), next.get(Calendar.DAY_OF_MONTH)); // FAILS: is Monday, Jan 10th, 23:00
}