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from dataclasses import dataclass, field
import pytest
from apischema import ValidationError, schema, validator
from apischema.validation import validate
@dataclass
class Foo:
bar: int = field(metadata=schema(min=0, max=10))
baz: int
@validator
def not_equal(self):
if self.bar == self.baz:
yield "bar cannot be equal to baz"
# validate don't validate constraints, but only validators
validate(Foo(-1, 0))
with pytest.raises(ValidationError) as err:
validate(Foo(2, 2))
assert err.value.errors == [{"loc": [], "err": "bar cannot be equal to baz"}]
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