code: def test_real_sr1(self):
      results = self.module.real_sr(
          image="tests/test.jpg", visualization=False
      )
  
      self.assertIsInstance(results, np.ndarray)
  
file_path: PaddleHub/modules/image/Image_editing/super_resolution/swinir_l_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 3 for calling the TestHubModule obj's underlying member method code with example usage: obj.test_real_sr1() without return types