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