Function predicate

tests/base.py:82–89

(
    func: typing.Callable[[typing.Any], bool],
)

def predicate(
    func: typing.Callable[[typing.Any], bool],
) -> typing.Callable[[typing.Any], None]:
    def validate(value: typing.Any) -> None:
        if func(value) is False:
            raise ValidationError("Invalid value.")

    return validate


##### Models #####