/// <summary>
/// The witching hour prep is every Saturday night at midnight in October
/// except on Halloween when the main event occurs (separate event).
/// </summary>
/// <returns></returns>
private static TemporalExpression BuildWitchingHourPrepTemporalExpression()
{
var halloween = new FixedHolidayTE(10, 31);
var holidays = new UnionTE();
holidays.Add(halloween);
var everySaturdayNight = new DayOfMonthTE(6);
var october = new RangeEachYearTE(10);
var saturdays = new UnionTE();
saturdays.Add(everySaturdayNight);
var intersection = new IntersectionTE();
intersection.Add(october);
intersection.Add(saturdays);
var diff = new DifferenceTE(intersection, holidays);
return diff;
}
/// <summary>
/// Street cleaning occurs from April to October on the first and third Monday of the
/// month, excluding holidays. In this test there are two holidays: July 4 and Labor
/// Day (first Monday in Sep). The street cleaning example is taken directly from
/// Martin Fowler's white paper "Recurring Events for Calendars".
/// </summary>
private static TemporalExpression BuildStreetCleaningTemporalExpression()
{
var maHolidays = new UnionTE();
var independenceDay = new FixedHolidayTE(7, 4);
var laborDay = new FloatingHolidayTE(9, 1, 1);
maHolidays.Add(independenceDay);
maHolidays.Add(laborDay);
var firstMondayFirstWeek = new DayInMonthTE(1, 1);
var firstMondayThirdWeek = new DayInMonthTE(1, 3);
var firstAndThirdMonday = new UnionTE();
firstAndThirdMonday.Add(firstMondayThirdWeek);
firstAndThirdMonday.Add(firstMondayFirstWeek);
var streetCleaningMonths = new IntersectionTE();
streetCleaningMonths.Add(firstAndThirdMonday);
streetCleaningMonths.Add(new RangeEachYearTE(3, 9));
var diff = new DifferenceTE(streetCleaningMonths, maHolidays);
return diff;
}