async def METHOD_NAME(multiple, snapshot, mongo, fake2):
    user_1 = await fake2.users.create()
    user_2 = await fake2.users.create()
    documents = {"_id": "bar", "user": {"id": user_1.id}}
    if multiple:
        documents = [
            documents,
            {"_id": "foo", "user": {"id": user_2.id}},
            {"_id": "baz", "user": {"id": user_1.id}},
        ]
    assert await apply_transforms(documents, [AttachUserTransform(mongo)]) == snapshot