public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var d = value as DateOffset;
if (d == null)
{
return(DependencyProperty.UnsetValue);
}
return(DateOffsetFormatter.GetUnitString(d.Offset, d.Unit));
}
public override object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
if (values.Length < 2 || !(values[0] is DateUnit) || !(values[1] is int?))
{
return(DependencyProperty.UnsetValue);
}
var unit = (DateUnit)values[0];
int?offset = (int?)values[1];
return(DateOffsetFormatter.GetUnitString(offset, unit));
}
public void UnitNegative()
{
var str = DateOffsetFormatter.GetUnitString(-1, DateUnit.Day);
Assert.AreEqual(PluralsHelper.days[0], str);
}
public void OffsetNull()
{
var str = DateOffsetFormatter.GetUnitString(null, DateUnit.Day);
Assert.AreEqual(PluralsHelper.days[2], str);
}