IntegerToLocalizedStringTransformer::reverseTransform() causes the input to be cast to an integer without respecting the rounding_mode option.

So an input of 1233.5 with ROUND_UP causes the data/view data to become int(1233) rather than int(1234).

The NumberToLocalizedStringTransformer doesn't have this problem as it stores the data as an unrounded double, so doing the same with a precision of 0 causes the data to be double(1233.5) and the view data is then correctly int(1234).

(The docs also state that there's a precision option for the integer type, which doesn't make a lot of sense...)