test sheduler

@Test
public void testThatWatchedCronExpressionIsCorrect() {
    CronTrigger trigger =
            new CronTrigger(watchedCron);
    Calendar today = Calendar.getInstance();
    today.set(Calendar.HOUR_OF_DAY, 9);
    today.set(Calendar.MINUTE, 0);

    final Date yesterday = today.getTime();
    Date nextExecutionTime = trigger.nextExecutionTime(
            new TriggerContext() {
                @Override
                public Date lastScheduledExecutionTime() {
                    return yesterday;
                }

                @Override
                public Date lastActualExecutionTime() {
                    return yesterday;
                }

                @Override
                public Date lastCompletionTime() {
                    return yesterday;
                }
            });

    assertEquals(nextExecutionTime.getHours(), 9);
    assertEquals(nextExecutionTime.getMinutes(), 0);
    ZoneId defaultZoneId = ZoneId.systemDefault();
    LocalDate yesterdayLocalDate = LocalDate.ofInstant(yesterday.toInstant(), defaultZoneId);
    LocalDate nextExecutionLocalDate = LocalDate.ofInstant(nextExecutionTime.toInstant(), defaultZoneId);
    long difference = DAYS.between(yesterdayLocalDate, nextExecutionLocalDate);
    assertEquals(1, difference);
}
@Test
public void testThatExpiredCronExpressionIsCorrect() {
    CronTrigger trigger =
            new CronTrigger(expiredCron);
    Calendar halfAnHour = Calendar.getInstance();
    halfAnHour.set(Calendar.MINUTE, 30);
    halfAnHour.set(Calendar.SECOND, 0);
    halfAnHour.set(Calendar.MILLISECOND, 0);

    final Date firstExecutionTime = halfAnHour.getTime();
    Date nextExecutionTime = trigger.nextExecutionTime(
            new TriggerContext() {
                @Override
                public Date lastScheduledExecutionTime() {
                    return firstExecutionTime;
                }

                @Override
                public Date lastActualExecutionTime() {
                    return firstExecutionTime;
                }

                @Override
                public Date lastCompletionTime() {
                    return firstExecutionTime;
                }
            });
    var diffInMillis = nextExecutionTime.getTime() - firstExecutionTime.getTime();
    assertEquals(30, TimeUnit.MILLISECONDS.toMinutes(diffInMillis));
}