private static CalendarQuarter TweakBy(
this CalendarQuarter calendarQuarter,
int amount,
CalendarQuarterComponent componentToTweak)
{
if (componentToTweak == CalendarQuarterComponent.Quarter)
{
var referenceMonth = new DateTime(calendarQuarter.Year, (int)calendarQuarter.QuarterNumber * 3, 1);
var updatedMonth = referenceMonth.AddMonths(amount * 3);
var result = new CalendarQuarter(updatedMonth.Year, (QuarterNumber)(updatedMonth.Month / 3));
return(result);
}
if (componentToTweak == CalendarQuarterComponent.Year)
{
var result = new CalendarQuarter(calendarQuarter.Year + amount, calendarQuarter.QuarterNumber);
return(result);
}
throw new NotSupportedException("this calendar quarter component is not supported: " + componentToTweak);
}
private static CalendarQuarter TweakComponentOfCalendarQuarter(this CalendarQuarter calendarQuarter, CalendarQuarterComponent componentToTweak)
{
if (componentToTweak == CalendarQuarterComponent.Quarter)
{
var tweakedQuarter = A.Dummy <QuarterNumber>().ThatIsNot(calendarQuarter.QuarterNumber);
var result = new CalendarQuarter(calendarQuarter.Year, tweakedQuarter);
return(result);
}
if (componentToTweak == CalendarQuarterComponent.Year)
{
var tweakedYear = A.Dummy <PositiveInteger>().ThatIs(y => y != calendarQuarter.Year && y <= 9999);
var result = new CalendarQuarter(tweakedYear, calendarQuarter.QuarterNumber);
return(result);
}
throw new NotSupportedException("this calendar quarter component is not supported: " + componentToTweak);
}
