test_response_dependency_chain() — fastapi Function Reference

Architecture documentation for the test_response_dependency_chain() function in test_response_dependency.py from the fastapi codebase.

Function python FastAPI Responses

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FastAPI→ Responses→ test_response_dependency_chain() — fastapi Function Reference

Dependency Diagram

graph TD
  19edd903_6d0f_2300_26ba_9b450d04031c["test_response_dependency_chain()"]
  b16d0181_b13b_77f6_4428_f731d5a25f66["test_response_dependency.py"]
  19edd903_6d0f_2300_26ba_9b450d04031c -->|defined in| b16d0181_b13b_77f6_4428_f731d5a25f66
  style 19edd903_6d0f_2300_26ba_9b450d04031c fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

tests/test_response_dependency.py lines 71–94

def test_response_dependency_chain():
    """Response dependency should work in a chain of dependencies."""
    app = FastAPI()

    def first_modifier(response: Response) -> Response:
        response.headers["X-First"] = "1"
        return response

    def second_modifier(
        response: Annotated[Response, Depends(first_modifier)],
    ) -> Response:
        response.headers["X-Second"] = "2"
        return response

    @app.get("/")
    def endpoint(response: Annotated[Response, Depends(second_modifier)]):
        return {"status": "ok"}

    client = TestClient(app)
    resp = client.get("/")

    assert resp.status_code == 200
    assert resp.headers.get("X-First") == "1"
    assert resp.headers.get("X-Second") == "2"