from dataclasses import dataclass

import pytest

from apischema import ValidationError, deserialize, validator


@dataclass
class PasswordForm:
    password: str
    confirmation: str

    @validator
    def password_match(self):
        # DO NOT use assert
        if self.password != self.confirmation:
            raise ValidationError("password doesn't match its confirmation")


with pytest.raises(ValidationError) as err:
    deserialize(PasswordForm, {"password": "p455w0rd", "confirmation": "..."})
assert err.value.errors == [
    {"loc": [], "err": "password doesn't match its confirmation"}
]