code: def test_no_model_loaded():
      """
      Validates that TorchServe returns reponse code 404 if no model is loaded.
      """
  
      os.makedirs(
          MODELSTORE_DIR, exist_ok=True
      )  # Create modelstore directory
      test_utils.start_torchserve(model_store=MODELSTORE_DIR)
  
      response = requests.post(
          url="http://localhost:8080/models/alexnet/invoke",
          data=open(data_file_kitten, "rb"),
      )
      assert (
          response.status_code == 404
      ), "Model not loaded error expected"
  
file_path: serve/test/pytest/test_sm_mme_requirements.py
imports: import os
  import pathlib
  import pytest
  import requests
  import test_utils
  import torch
label_desc: Use image node_id 1 for calling a global function with example usage: test_no_model_loaded() without return types