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