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from dataclasses import dataclass, field
import pytest
from mashumaro import DataClassDictMixin, field_options
from mashumaro.core.const import PY_310_MIN
if not PY_310_MIN:
pytest.skip("requires python>=3.10", allow_module_level=True)
def test_field_options_in_dataclass_with_slots():
@dataclass(slots=True)
class DataClass(DataClassDictMixin):
x: int = field(metadata=field_options(serialize=str, alias="alias"))
instance = DataClass(123)
assert DataClass.from_dict({"alias": 123}) == instance
assert instance.to_dict() == {"x": "123"}
def test_field_options_in_inherited_dataclass_with_slots():
@dataclass
class BaseDataClass(DataClassDictMixin):
y: int
@dataclass(slots=True)
class DataClass(BaseDataClass):
x: int = field(metadata=field_options(serialize=str, alias="alias"))
instance = DataClass(x=123, y=456)
assert DataClass.from_dict({"alias": 123, "y": 456}) == instance
assert instance.to_dict() == {"x": "123", "y": 456}
def test_no_field_options_in_inherited_dataclass_with_slots():
@dataclass
class BaseDataClass(DataClassDictMixin):
y: int
@dataclass(slots=True)
class DataClass(BaseDataClass):
x: int
instance = DataClass(x=123, y=456)
assert DataClass.from_dict({"x": 123, "y": 456}) == instance
assert instance.to_dict() == {"x": 123, "y": 456}
def test_no_field_options_in_inherited_dataclass_with_slots_and_default():
@dataclass
class BaseDataClass(DataClassDictMixin):
y: int
@dataclass(slots=True)
class DataClass(BaseDataClass):
x: int = 123
instance = DataClass(y=456)
assert DataClass.from_dict({"y": 456}) == instance
assert instance.to_dict() == {"x": 123, "y": 456}
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