test_merged_mixed_state_lifespans() — fastapi Function Reference

Architecture documentation for the test_merged_mixed_state_lifespans() function in test_router_events.py from the fastapi codebase.

Function python FastAPI Routing

Entity Profile

FastAPI→ Routing→ test_merged_mixed_state_lifespans() — fastapi Function Reference

Dependency Diagram

graph TD
  503ec5a3_af45_dc91_cbf5_cdb4e015c441["test_merged_mixed_state_lifespans()"]
  05561238_1d26_3221_b177_440da9d6e710["test_router_events.py"]
  503ec5a3_af45_dc91_cbf5_cdb4e015c441 -->|defined in| 05561238_1d26_3221_b177_440da9d6e710
  style 503ec5a3_af45_dc91_cbf5_cdb4e015c441 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

tests/test_router_events.py lines 223–243

def test_merged_mixed_state_lifespans() -> None:
    @asynccontextmanager
    async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
        yield

    @asynccontextmanager
    async def router_lifespan(app: FastAPI) -> AsyncGenerator[dict[str, bool], None]:
        yield {"router": True}

    @asynccontextmanager
    async def sub_router_lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
        yield

    sub_router = APIRouter(lifespan=sub_router_lifespan)
    router = APIRouter(lifespan=router_lifespan)
    app = FastAPI(lifespan=lifespan)
    router.include_router(sub_router)
    app.include_router(router)

    with TestClient(app) as client:
        assert client.app_state == {"router": True}