test_autostrategy_with_anonymous_json_schema() — langchain Function Reference

Source Code

libs/langchain_v1/tests/unit_tests/agents/test_response_format.py lines 200–229

    def test_autostrategy_with_anonymous_json_schema(self) -> None:
        """Test response_format as anonymous JSON schema (AutoStrategy).

        Verifies that tool name mismatch is avoided when using AutoStrategy with
        schemas that generate random names by ensuring the ToolStrategy instance
        is reused during execution.
        """
        anonymous_schema = {
            "type": "object",
            "properties": {
                "result": {"type": "string"},
            },
            "required": ["result"],
        }

        with patch("langchain.agents.factory._supports_provider_strategy", return_value=False):
            model = FakeToolCallingModel(tool_calls=[])
            agent = create_agent(model, [], response_format=anonymous_schema)

            # We expect a recursion error or similar because we didn't mock the tool call
            # matching our anonymous schema, but it should NOT raise ValueError
            # during the binding phase.
            try:
                agent.invoke({"messages": [HumanMessage("hi")]}, config={"recursion_limit": 1})
            except ValueError as e:
                if "which wasn't declared" in str(e):
                    pytest.fail(f"Tool name mismatch occurred: {e}")
            except Exception:  # noqa: S110
                # Other exceptions mean we passed the binding phase
                pass