async def get_db():
    db = DBSession()
    try:
        yield db
    finally:

    def read_root(c: Annotated[Any, Depends(get_db)]):
        return {"c": str(c)}

    client = TestClient(app)

    dbsession_mock = Mock()

    with patch(
        "docs_src.dependencies.tutorial010_py39.DBSession",
        return_value=dbsession_mock,
        create=True,
    ):
        response = client.get("/")

    assert response.status_code == 200

class MySuperContextManager:
    def __init__(self):
        self.db = DBSession()

    def __enter__(self):
        return self.db

    def __exit__(self, exc_type, exc_value, traceback):
        self.db.close()


async def get_db():
    with MySuperContextManager() as db:

        cm = asynccontextmanager(get_db)
        async with cm() as db_session:
            return db_session

    dbsession_moock = Mock()

    with patch(
        "docs_src.dependencies.tutorial007_py39.DBSession",
        return_value=dbsession_moock,
        create=True,
    ):
        value = asyncio.run(test_async_gen())

    assert value is dbsession_moock