LifespanManager AsyncClient TimeOut Error - Apple Mac M1

[Ian-Hart]

I enjoyed this Fastapi series and had everything working until I updated my computer from Mac Pro 2015 to Mac Air (M1). From there I experienced unexplained concurrency and time out errors when running pytest. Tests would sometimes work other times fail. After several days of trial and error I narrowed the issue to httpx AsyncClient or LIfespan manager. Sharing the solution in case anyone else has the same issue.

1. Updated requirement.txts to add async_asgi_testclient and remove httpx and asgi-lifespan

fastapi==0.65.0
uvicorn==0.15.0
pydantic==1.4
email-validator== 1.1.1

databases[postgresql]==0.5.3
SQLAlchemy==1.4.27
alembic== 1.7.5
psycopg2-binary==2.9.2

pytest== 6.2.5
pytest-asyncio== 0.16.0
async_asgi_testclient==1.4.7

2. Updated the client in conftest.py to async_asgi_testclient

from async_asgi_testclient import TestClient

@pytest.fixture
async def client(app: FastAPI) -> TestClient:
async with TestClient(app) as client:
yield client

3. Updated the tests to use the TestClient. For instance in test_cleanings.py

from async_asgi_testclient import TestClient

class TestCreateCleaning:
async def test_valid_input_creates_cleaning(
self, app: FastAPI, client: TestClient, new_cleaning: CleaningCreate
) -> None:
res = await client.post(
app.url_path_for("cleanings:create-cleaning"),
headers={"Content-Type": "application/json"},
json={"new_cleaning": new_cleaning.dict()}
)
assert res.status_code == HTTP_201_CREATED

[pablo-johnson]

Thank you very much!

[SuperHao-Wu]

Thank you very much, M1 is really good but also very painful, I also spent whole day to figure out the reason.
and for "OAuth2PasswordRequestForm" use "form" instead of "data" in the async_asgi_testclient

[natuspati]

I'm also having concurrency issues in dockerized exection on M1. async_asgi_testclient TestClient helps with timing out issue.

Another problem is pytest.fixture decorated co-routines either miss attributes (see: this question) or are not detected at all. As indicated in the top answer, pytest_asyncio.fixture solved all issues.

[VladislavYak]

thanks!

In my case i had to also update @pytest_asyncio.fixture:

# Make requests in our tests
@pytest_asyncio.fixture
async def client(app: FastAPI) -> TestClient:
    async with TestClient(app) as client:
        yield client