code: def test_real_sr3(self):
      results = self.module.real_sr(
          image=cv2.imread("tests/test.jpg"), visualization=True
      )
  
      self.assertIsInstance(results, np.ndarray)
  
file_path: PaddleHub/modules/image/Image_editing/super_resolution/swinir_m_real_sr_x4/test.py
imports: import os
  import shutil
  import unittest
  import cv2
  import numpy
  import requests
  import paddlehub
label_desc: Use image node_id 5 for calling the TestHubModule obj's underlying member method code with example usage: obj.test_real_sr3() without return types