code: def setUpClass(cls) -> None:
      img_url = "https://unsplash.com/photos/pg_WCHWSdT8/download?ixid=MnwxMjA3fDB8MXxhbGx8fHx8fHx8fHwxNjYyNDM2ODI4&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)
      fourcc = cv2.VideoWriter_fourcc("M", "J", "P", "G")
      img = cv2.imread("tests/test.jpg")
      video = cv2.VideoWriter(
          "tests/test.avi", fourcc, 20.0, tuple(img.shape[:2])
      )
      for i in range(40):
          video.write(img)
      video.release()
      cls.module = hub.Module(name="humanseg_mobile")
  
imports: import os
  import shutil
  import unittest
  import cv2
  import numpy
  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