python/pyfory/tests/test_duplicate_field_names.py

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"""
Tests for field shadowing in inheritance.
"""

from dataclasses import dataclass
from pyfory import Fory
from pyfory.meta.typedef_encoder import encode_typedef


@dataclass
class Parent:
    name: str
    value: int


@dataclass
class ChildWithShadow(Parent):
    name: str  # Shadows Parent.name
    extra: float


def test_shadowed_fields_serialization():
    """Serialization with shadowed and inherited fields."""
    fory = Fory(xlang=True)
    fory.register(Parent, namespace="test", typename="Parent")
    fory.register(ChildWithShadow, namespace="test", typename="ChildWithShadow")

    # Verify TypeDef has exactly 3 fields (no duplicate 'name')
    typedef = encode_typedef(fory.type_resolver, ChildWithShadow)
    assert len(typedef.fields) == 3

    obj = ChildWithShadow(name="shadowed", value=10, extra=3.14)
    data = fory.serialize(obj)
    result = fory.deserialize(data)

    assert result.name == "shadowed"
    assert result.value == 10  # inherited field
    assert result.extra == 3.14