Typing issue: ASGITransport's app argument is not compatible with FastAPI/Starlette app.

[AlexanderPodorov]

See example code:

from fastapi import FastAPI
from httpx import ASGITransport, AsyncClient

# I guess the same issue will be for Starlette app, since FastAPI class just inherits from Starlette
app = FastAPI()


async def test() -> None:
    # line below shows typing issue by pyright:
    async with AsyncClient(base_url="http://test-server.com", transport=ASGITransport(app)) as client:
        await client.get("")

I'm not sure is it a proper fix, but replacing all Dict with MutableMapping right there solves the issue:

httpx/httpx/_transports/asgi.py

Lines 19 to 26 in 326b943

	_Message = typing.Dict[str, typing.Any]
	_Receive = typing.Callable[[], typing.Awaitable[_Message]]
	_Send = typing.Callable[
	[typing.Dict[str, typing.Any]], typing.Coroutine[None, None, None]
	]
	_ASGIApp = typing.Callable[
	[typing.Dict[str, typing.Any], _Receive, _Send], typing.Coroutine[None, None, None]
	]

httpx==0.27.0
fastapi==0.109.2
pyright==1.1.351