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from dataclasses import dataclass, field
import pytest
from apischema import ValidationError, deserialize, validator
from apischema.objects import AliasedStr, get_alias
@dataclass
class A:
a: int = field()
@validator(a)
def validate_a(self):
yield (get_alias(self).a, "b", 0, AliasedStr("c")), f"error {self.a}"
def test_validator_aliasing():
with pytest.raises(ValidationError) as err:
deserialize(A, {"A": 42}, aliaser=str.upper)
assert err.value.errors == [{"loc": ["A", "A", "b", 0, "C"], "err": "error 42"}]
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