Coverage bug (SQLAlchemy + aiosqlite + strawberry-graphql)

docker-compose.yml

version: "3.8"

services:
  test:
    build:
      context: .

Dockerfile

FROM python:3.10.1-slim-bullseye

RUN pip install \
    sqlalchemy==1.4.31 \
    strawberry-graphql==0.95.1 \
    coverage==6.3.0 \
    aiosqlite==0.17.0

WORKDIR /src/

COPY example.py run.py /src/

CMD ["python", "run.py"]

example.py

import asyncio

from sqlalchemy import sql

import strawberry
from sqlalchemy.ext.asyncio import create_async_engine


@strawberry.type
class Mutation:
    @strawberry.field
    async def my_mutation(info) -> int:
        engine = create_async_engine("sqlite+aiosqlite://")

        async with engine.connect() as connection:
            await connection.execute(sql.text("SELECT 1"))

            print("This is not covered")
            return 123


@strawberry.type
class Query:
    garb: int


schema = strawberry.Schema(query=Query, mutation=Mutation)


async def test_bug() -> None:
    await schema.execute("mutation { myMutation }")


asyncio.run(test_bug())

run.py

import coverage

cov = coverage.Coverage(include="example.py", timid=True)
cov.start()

import example

cov.stop()
cov.save()

cov.report(show_missing=True)