Bug: Arbitrary dependencies in WebSocketListener fail

[provinzkraut]

Description

Injecting arbitrary dependencies (that is, dependencies that are not "reserved" like state) cannot be successfully injected into a WebSocketListener subclass. The injection works as intended when using the websocket_listener decorator.

MCVE

from litestar import WebSocket, Litestar
from litestar.handlers import WebsocketListener
from litestar.testing import TestClient


class Listener(WebsocketListener):
    path = "/ws"

    def on_accept(self, socket: WebSocket, foo: str) -> None:
        pass

    async def on_receive(self, data: dict) -> dict:
        return data


app = Litestar(
    [Listener],
    dependencies={"foo": lambda: "bar"},
)


with TestClient(app) as client, client.websocket_connect("/ws") as ws:
    ws.send_json({"foo": "bar"})

Litestar Version

2.0.0alpha7