test_depend_validation() — fastapi Function Reference

Architecture documentation for the test_depend_validation() function in test_ws_router.py from the fastapi codebase.

Function python FastAPI Routing calls 1

Entity Profile

FastAPI→ Routing→ test_depend_validation() — fastapi Function Reference

Dependency Diagram

graph TD
  9dd8d5e2_dc81_0024_ce18_a03f51e1055d["test_depend_validation()"]
  b2e4c2fb_8042_93dc_9d79_2ae1a12773d6["test_ws_router.py"]
  9dd8d5e2_dc81_0024_ce18_a03f51e1055d -->|defined in| b2e4c2fb_8042_93dc_9d79_2ae1a12773d6
  afb5e1a2_9bfc_75af_3be4_6639f67befbd["make_app()"]
  9dd8d5e2_dc81_0024_ce18_a03f51e1055d -->|calls| afb5e1a2_9bfc_75af_3be4_6639f67befbd
  style 9dd8d5e2_dc81_0024_ce18_a03f51e1055d fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

tests/test_ws_router.py lines 210–233

def test_depend_validation():
    """
    Verify that a validation in a dependency invokes the correct exception handler
    """
    caught = []

    @websocket_middleware
    async def catcher(websocket, call_next):
        try:
            return await call_next()
        except Exception as e:  # pragma: no cover
            caught.append(e)
            raise

    myapp = make_app(middleware=[Middleware(catcher)])

    client = TestClient(myapp)
    with pytest.raises(WebSocketDisconnect) as e:
        with client.websocket_connect("/depends-validate/"):
            pass  # pragma: no cover
    # the validation error does produce a close message
    assert e.value.code == status.WS_1008_POLICY_VIOLATION
    # and no error is leaked
    assert caught == []