def test_encode_unsupported():
    unserializable = Unserializable()
    with pytest.raises(ValueError):
        jsonable_encoder(unserializable)


@needs_pydanticv2
def test_encode_custom_json_encoders_model_pydanticv2():
    from pydantic import field_serializer

    class ModelWithCustomEncoder(BaseModel):
        dt_field: datetime

        @field_serializer("dt_field")