public void GetCronExpressionFromSchedule_NullClone_Works()
 {
     var schedule = new NullSchedule();
     var cloned = schedule.Clone();
     var clonedTyped = Assert.IsType<NullSchedule>(cloned);
     Assert.Equal(schedule.GetType(), clonedTyped.GetType());
     Assert.NotSame(schedule, clonedTyped);
 }