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from dataclasses import dataclass, field
import pytest
from apischema import ValidationError, deserialize, serialize
from apischema.json_schema import deserialization_schema, serialization_schema
from apischema.metadata import none_as_undefined
@dataclass
class Foo:
bar: str | None = field(default=None, metadata=none_as_undefined)
assert (
deserialization_schema(Foo)
== serialization_schema(Foo)
== {
"$schema": "http://json-schema.org/draft/2020-12/schema#",
"type": "object",
"properties": {"bar": {"type": "string"}},
"additionalProperties": False,
}
)
with pytest.raises(ValidationError):
deserialize(Foo, {"bar": None})
assert serialize(Foo, Foo(None)) == {}
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