#5 incorrect lifespan pass-in

[kdcokenny]

async with LifespanManager(app, lifespan) as manager: is incorrect and throws the error: TypeError: '<=' not supported between instances of 'function' and 'int'.

Based on this, the example should be:

from contextlib import asynccontextmanager
from typing import AsyncIterator

import anyio
from asgi_lifespan import LifespanManager
from httpx import AsyncClient, ASGITransport
from fastapi import FastAPI

@asynccontextmanager
async def lifespan(app: FastAPI) -> AsyncIterator[None]:
    print("Starting app")
    yield
    print("Stopping app")

app = FastAPI(lifespan=lifespan)

@app.get("/")
async def read_root():
    return {"Hello": "World"}

async def main():
    async with LifespanManager(app) as manager:
        async with AsyncClient(transport=ASGITransport(app=manager.app)) as client:
            response = await client.get("/")
            assert response.status_code == 200
            assert response.json() == {"Hello": "World"}

anyio.run(main)

Instead of the current:

from contextlib import asynccontextmanager
from typing import AsyncIterator

import anyio
from asgi_lifespan import LifespanManager
from httpx import AsyncClient, ASGITransport
from fastapi import FastAPI

@asynccontextmanager
async def lifespan(app: FastAPI) -> AsyncIterator[None]:
    print("Starting app")
    yield
    print("Stopping app")

app = FastAPI(lifespan=lifespan)

@app.get("/")
async def read_root():
    return {"Hello": "World"}

async def main():
    async with LifespanManager(app, lifespan) as manager:
        async with AsyncClient(transport=ASGITransport(app=manager.app)) as client:
            response = await client.get("/")
            assert response.status_code == 200
            assert response.json() == {"Hello": "World"}

anyio.run(main)