code: def test_one_request_upon_cached(self):
      # TODO: For some reason this test fails on MPS where no HEAD call is made.
      if torch_device == "mps":
          return
  
      use_safetensors = False
  
      with tempfile.TemporaryDirectory() as tmpdirname:
          with requests_mock.mock(real_http=True) as m:
              UNet2DConditionModel.from_pretrained(
                  "hf-internal-testing/tiny-stable-diffusion-torch",
                  subfolder="unet",
                  cache_dir=tmpdirname,
                  use_safetensors=use_safetensors,
              )
  
          download_requests = [r.method for r in m.request_history]
          assert (
              download_requests.count("HEAD") == 2
          ), "2 HEAD requests one for config, one for model"
          assert (
              download_requests.count("GET") == 2
          ), "2 GET requests one for config, one for model"
  
          with requests_mock.mock(real_http=True) as m:
              UNet2DConditionModel.from_pretrained(
                  "hf-internal-testing/tiny-stable-diffusion-torch",
                  subfolder="unet",
                  cache_dir=tmpdirname,
                  use_safetensors=use_safetensors,
              )
  
          cache_requests = [r.method for r in m.request_history]
          assert (
              "HEAD" == cache_requests[0] and len(cache_requests) == 1
          ), "We should call only `model_info` to check for _commit hash and `send_telemetry`"
  
imports: import inspect
  import tempfile
  import traceback
  import unittest
  import unittest.mock
  import uuid
  from typing import Dict, List, Tuple
  import numpy
  import requests_mock
  import torch
  from huggingface_hub import delete_repo
  from requests.exceptions import HTTPError
  from diffusers.models import UNet2DConditionModel
  from diffusers.models.attention_processor import AttnProcessor, AttnProcessor2_0, XFormersAttnProcessor
  from diffusers.training_utils import EMAModel
  from diffusers.utils import is_xformers_available, logging
  from diffusers.utils.testing_utils import CaptureLogger, require_python39_or_higher, require_torch_2, require_torch_gpu, run_test_in_subprocess, torch_device
  from ..others.test_utils import TOKEN, USER, is_staging_test
label_desc: Use image node_id 4 for calling the ModelUtilsTest obj's underlying member method code with example usage: obj.test_one_request_upon_cached() without return types