Bug: ResourceWarning: Unclosed <MemoryObjectReceiveStream> with AsyncTestClient and anyio>=4.4

[gsakkis]

Description

I started running tests with -W error and one of the (intermittent) warnings turned to errors was Unclosed <MemoryObjectReceiveStream>. After lots of digging I managed to reduce it to the MCVE below:

• The test_httpx_async_client passes with both anyio==4.3.0 and anyio==4.4.0
• The test_litestar_async_client passes only with anyio==4.3.0 (and previous versions)

Related anyio change: agronholm/anyio#715

URL to code causing the issue

No response

MCVE

import httpx
from litestar import Litestar
from litestar.testing import AsyncTestClient


app = Litestar(route_handlers=[])


async def test_httpx_async_client():
    for _ in range(10):
        async with httpx.AsyncClient(transport=httpx.ASGITransport(app)):
            pass


async def test_litestar_async_client():
    for _ in range(10):
        async with AsyncTestClient(app=app):
            pass

Steps to reproduce

`python -W error -m pytest test_resourcewarning.py`

Screenshots

"![SCREENSHOT_DESCRIPTION](SCREENSHOT_LINK.png)"

Logs

No response

Litestar Version

2.12.1

Platform

• Linux
• Mac
• Windows
• Other (Please specify in the description above)

[github-actions]

This issue has been closed in #3836. The change will be included in upcoming releases.

[github-actions]

A fix for this issue has been released in v2.13.0