Attempt to fix #12

src/controller/client.py

@@ -1,6 +1,6 @@
 """Handles communication between one WebSocket tunnel and the game"""
 
-from typing import Callable, Any, TYPE_CHECKING
+from typing import Callable, Any, TYPE_CHECKING, Awaitable
 from pydantic import ValidationError
 
 from websockets.server import WebSocketServerProtocol
@@ -45,6 +45,8 @@ class ClientController:
 
     track_connection: Callable
 
+    on_message = Callable[[Message], Awaitable[None]]
+
     def __init__(
         self,
         game_controller: "GameController",
@@ -53,7 +55,10 @@ class ClientController:
         self.websocket = websocket
         self.game_controller = game_controller
         self.game_controller.clients.append(self)
-        self.on_message = lambda _: None
+        self.on_message = self.on_message_stub
+
+    async def on_message_stub(self, message: Message):
+        pass
 
     async def close(self):
         """Remove self from Game broadcasting list"""