code: def test_predict1(self):
      results = self.module.predict(
          images=["tests/test.jpg"], visualization=False
      )
      gray = results[0]["gray"]
      hint = results[0]["hint"]
      real = results[0]["real"]
      fake_reg = results[0]["fake_reg"]
  
      self.assertIsInstance(gray, np.ndarray)
      self.assertIsInstance(hint, np.ndarray)
      self.assertIsInstance(real, np.ndarray)
      self.assertIsInstance(fake_reg, np.ndarray)
  
file_path: PaddleHub/modules/image/Image_editing/colorization/user_guided_colorization/test.py
imports: import os
  import shutil
  import unittest
  import cv2
  import requests
  import numpy
  import paddlehub
label_desc: Use image node_id 3 for calling the TestHubModule obj's underlying member method code with example usage: obj.test_predict1() without return types