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