code: def test_create_modelkit_app_no_model(monkeypatch):
      monkeypatch.delenv("MODELKIT_DEFAULT_PACKAGE", raising=False)
      with pytest.raises(ModelsNotFound):
          create_modelkit_app(models=None)
  
imports: import asyncio
  import os
  import platform
  import fastapi
  import pydantic
  import pytest
  from starlette.testclient import TestClient
  from modelkit import testing
  from modelkit.api import ModelkitAutoAPIRouter, create_modelkit_app
  from modelkit.core.errors import ModelsNotFound
  from modelkit.core.model import Asset, AsyncModel, Model
  from tests import TEST_DIR
label_desc: Use image node_id 7 for calling a global function with example usage: test_create_modelkit_app_no_model(monkeypatch) without return types