"root_path": "",
        "headers": [],
        "server": ("test", 80),
    }

    with anyio.move_on_after(timeout) as cancel_scope:
        await app(scope, receive, send)  # type: ignore[arg-type]

    # If we got here within the timeout the generator was cancellable.
    # cancel_scope.cancelled_caught is True when move_on_after fired.
    return cancel_scope.cancelled_caught or len(chunks) > 0