langchain Architecture Docs
Home / Function/ test_custom_callable_detector() — langchain Function Reference

test_custom_callable_detector() — langchain Function Reference

Architecture documentation for the test_custom_callable_detector() function in test_pii.py from the langchain codebase.

Function python LangChainCore Runnables

Entity Profile

Dependency Diagram

graph TD
  1360b6fe_5bcd_382a_b076_d28c73bb0fba["test_custom_callable_detector()"]
  e5e43364_b415_657a_0443_07c4b33daca1["TestCustomDetector"]
  1360b6fe_5bcd_382a_b076_d28c73bb0fba -->|defined in| e5e43364_b415_657a_0443_07c4b33daca1
  style 1360b6fe_5bcd_382a_b076_d28c73bb0fba fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_pii.py lines 532–558

    def test_custom_callable_detector(self) -> None:
        # Custom detector function
        def detect_custom(content: str) -> list[PIIMatch]:
            matches = []
            if "CONFIDENTIAL" in content:
                idx = content.index("CONFIDENTIAL")
                matches.append(
                    PIIMatch(
                        type="confidential",
                        value="CONFIDENTIAL",
                        start=idx,
                        end=idx + 12,
                    )
                )
            return matches

        middleware = PIIMiddleware(
            "confidential",
            detector=detect_custom,
            strategy="redact",
        )

        state = AgentState[Any](messages=[HumanMessage("This is CONFIDENTIAL information")])
        result = middleware.before_model(state, Runtime())

        assert result is not None
        assert "[REDACTED_CONFIDENTIAL]" in result["messages"][0].content

Domain

Subdomains

Defined In

Source

Frequently Asked Questions

What does test_custom_callable_detector() do?
test_custom_callable_detector() is a function in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_pii.py.
Where is test_custom_callable_detector() defined?
test_custom_callable_detector() is defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_pii.py at line 532.

Analyze Your Own Codebase

Get architecture documentation, dependency graphs, and domain analysis for your codebase in minutes.

Try Supermodel Free