from dataclasses import dataclass
from ipaddress import IPv4Address, IPv4Network

import pytest

from apischema import ValidationError, deserialize, validator
from apischema.objects import get_alias


@dataclass
class SubnetIps:
    subnet: IPv4Network
    ips: list[IPv4Address]

    @validator
    def check_ips_in_subnet(self):
        for index, ip in enumerate(self.ips):
            if ip not in self.subnet:
                # yield <error path>, <error message>
                yield (get_alias(self).ips, index), "ip not in subnet"


with pytest.raises(ValidationError) as err:
    deserialize(
        SubnetIps,
        {"subnet": "126.42.18.0/24", "ips": ["126.42.18.1", "126.42.19.0", "0.0.0.0"]},
    )
assert err.value.errors == [
    {"loc": ["ips", 1], "err": "ip not in subnet"},
    {"loc": ["ips", 2], "err": "ip not in subnet"},
]