test_init_validator_blocks_deserialization() — langchain Function Reference

Source Code

libs/core/tests/unit_tests/load/test_serializable.py lines 609–622

    def test_init_validator_blocks_deserialization(self) -> None:
        """Test that `init_validator` can block deserialization by raising."""
        doc = Document(page_content="test", metadata={"source": "test.txt"})
        serialized = dumpd(doc)

        def block_metadata(
            _class_path: tuple[str, ...], kwargs: dict[str, Any]
        ) -> None:
            if "metadata" in kwargs:
                msg = "Metadata not allowed"
                raise ValueError(msg)

        with pytest.raises(ValueError, match="Metadata not allowed"):
            load(serialized, allowed_objects=[Document], init_validator=block_metadata)