Function test_struct_meta_subclass_with_encoder

tests/unit/test_struct_meta.py:335–370

Test compatibility of structs created by StructMeta subclasses with encoders.

()

def test_struct_meta_subclass_with_encoder():
    """Test compatibility of structs created by StructMeta subclasses with encoders."""

    # Define a custom metaclass
    class EncoderMeta(StructMeta):
        """Custom metaclass for testing encoders"""

    # Use the custom metaclass to create a struct class
    class EncoderStruct(metaclass=EncoderMeta):
        id: int
        name: str
        tags: list[str] = []

    # Create an instance
    obj = EncoderStruct(id=123, name="test")

    # Test JSON encoding and decoding
    json_bytes = msgspec.json.encode(obj)
    decoded = msgspec.json.decode(json_bytes, type=EncoderStruct)

    assert decoded.id == 123
    assert decoded.name == "test"
    assert decoded.tags == []

    # Test encoding and decoding with nested structs
    class Container(metaclass=EncoderMeta):
        item: EncoderStruct
        count: int

    container = Container(item=obj, count=1)
    json_bytes = msgspec.json.encode(container)
    decoded = msgspec.json.decode(json_bytes, type=Container)

    assert decoded.count == 1
    assert decoded.item.id == 123
    assert decoded.item.name == "test"


def test_structmeta_abcmeta_mixed_behaves_like_abc():