private static CalendarMonth TweakBy(
this CalendarMonth calendarMonth,
int amount,
CalendarMonthComponent componentToTweak)
{
if (componentToTweak == CalendarMonthComponent.Month)
{
var referenceMonth = new DateTime(calendarMonth.Year, (int)calendarMonth.MonthOfYear, 1);
var updatedMonth = referenceMonth.AddMonths(amount);
var result = new CalendarMonth(updatedMonth.Year, (MonthOfYear)updatedMonth.Month);
return(result);
}
if (componentToTweak == CalendarMonthComponent.Year)
{
var result = new CalendarMonth(calendarMonth.Year + amount, calendarMonth.MonthOfYear);
return(result);
}
throw new NotSupportedException("this calendar month component is not supported: " + componentToTweak);
}
private static CalendarMonth TweakComponentOfCalendarMonth(this CalendarMonth calendarMonth, CalendarMonthComponent componentToTweak)
{
if (componentToTweak == CalendarMonthComponent.Month)
{
var tweakedMonth = A.Dummy <MonthOfYear>().ThatIsNot(calendarMonth.MonthOfYear);
var result = new CalendarMonth(calendarMonth.Year, tweakedMonth);
return(result);
}
if (componentToTweak == CalendarMonthComponent.Year)
{
var tweakedYear = A.Dummy <PositiveInteger>().ThatIs(y => y != calendarMonth.Year && y <= 9999);
var result = new CalendarMonth(tweakedYear, calendarMonth.MonthOfYear);
return(result);
}
throw new NotSupportedException("this calendar month component is not supported: " + componentToTweak);
}
