RuntimeError for specific websocket connection init timeout

[Kwaidan00]

Let's consider the following code:

GraphQLTransportWSHandler(connection_init_wait_timeout=timedelta(minutes=0))

which is used in the Ariadne's test suite.

After the changes of the test client implementation introduced in Starlette 0.45.1 (https://github.com/encode/starlette/releases/tag/0.45.1), the following test fails every time:

FAILED tests/asgi/test_configuration.py::test_init_wait_timeout_graphql_transport_ws - RuntimeError: Cannot call "send" once a close message has been sent.

However, I don't think the failing test is caused by Starlette changes. It could just reveal an issue that existed before. I tried to run https://github.com/mirumee/ariadne-graphql-chat-example with the 0 timeout, I could see this RuntimeError as well. I double-checked it for both older and newest Starlette.

The problematic code lives in

ariadne/ariadne/asgi/handlers/graphql_transport_ws.py

Lines 108 to 113 in 9476a43

	timeout_handler = self.handle_connection_init_timeout(websocket, client_context)
	client_context.connection_init_timeout_task = asyncio.create_task(
	timeout_handler
	)
	await websocket.accept("graphql-transport-ws")

- the timeout handler task closes the connection, but after that accept is called.