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Graph/pytest

Package

pytest

pytest

pytest

Node Details

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Updated4/30/2026

PageRank0.0003

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16 linked nodes

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AFFECTSRootCause

`conn.execute()` gives you a coroutine instead of your `AsyncContextMock` — Your fake_execute is async function. Tension: the async with doesn't know what to do with a coroutine. Outcome: it needs something with aenter and aexit.

AFFECTSRootCause

The Beanie/Mongo (Motor) initialization and FastAPI lifespan effects are tied to fixtures with session scope, so the same event loop/client/app state is reused across multiple tests, causing conflicts or stale connections.

AFFECTSRootCause

app.dependency_overrides[connection] = lambda: mock_motor_client.

AFFECTSRootCause

Async fixtures do not work out of the box. Tension: You need to install helper packages, such as `anyio` or `pytest-asyncio`. Outcome: mark your fixture as requiring async semantics.

AFFECTSRootCause

An async fixture for the SQLAlchemy engine was declared with scope="session", causing pytest-asyncio to create/use a different event loop than the one used by the test tasks, so Futures/Tasks were bound to different loops.

AFFECTSRootCause

it doesn't handle the asynchronous nature of the FastAPI app's lifespan context properly — The main reason that the written test fails. Tension: `global_rw` is not set due to improper initialization. Outcome: the FastAPI app's lifespan context correctly works and `global_rw` is initialized properly.

AFFECTSRootCause

you probably will need to use and async client with the asyncio pytest plugins — Since you're writing an async lifespan. Tension: sync/async issue.

AFFECTSRootCause

FastAPI and Starlette versions were incompatible (FastAPI 0.101.1 with Starlette 0.46.0), causing request parsing/handling to fail at runtime.

AFFECTSRootCause

if the function declares the input parameter with `Annotated` and `Depends` — a simple API created in python with FastApi. Tension: the test fails. Outcome: The route responds with a 422 Unprocessable Entity status code.

REQUIRESSolution

use `pytest_asyncio` and the async fixture — If you don't want to utilize an `AsyncClient` like the one by `httpx`. Tension: ensuring that the FastAPI app's lifespan context correctly works.

PERTAIN_TOProblem

the mock-test is giving me an error — I have `async with connection.execute(query) as cursor:` block in my endpoint. Tension: the non-mock test is passing, but the mock-test is giving me an error. Outcome: delete the async from `fake_execute` just make it a regular function so it returns your context manager directly.

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