Function handler

tests/test_web_websocket_functional.py:20–25

(request)

async def test_websocket_can_prepare(loop, aiohttp_client) -> None:
    async def handler(request):
        ws = web.WebSocketResponse()
        if not ws.can_prepare(request):
            raise web.HTTPUpgradeRequired()

        return web.Response()

    app = web.Application()
    app.router.add_route("GET", "/", handler)