code: def setUpClass(cls) -> None:
      img_url = "https://unsplash.com/photos/iFgRcqHznqg/download?ixid=MnwxMjA3fDB8MXxzZWFyY2h8MXx8ZmFjZXxlbnwwfHx8fDE2NjE5ODAyMTc&force=true&w=640"
      if not os.path.exists("tests"):
          os.makedirs("tests")
      response = requests.get(img_url)
      assert response.status_code == 200, "Network Error."
      with open("tests/test.jpg", "wb") as f:
          f.write(response.content)
      cls.module = hub.Module(name="pyramidbox_lite_server_mask")
  
file_path: PaddleHub/modules/image/face_detection/pyramidbox_lite_server_mask/test.py
imports: import os
  import shutil
  import unittest
  import cv2
  import requests
  import paddlehub
label_desc: Use image node_id 1 for calling the TestHubModule obj's underlying member method code with example usage: obj.setUpClass(cls) without return types