code: def test_get_md5(self):
      file, md5 = self.file1
      self.assertEqual(get_md5(file), md5)
      file, md5 = self.file2
      self.assertNotEqual(get_md5(file), md5)
  
imports: import json
  import os
  import tempfile
  import unittest
  from mmocr.utils import check_integrity, get_md5, is_archive, list_files, list_from_file, list_to_file
label_desc: Use image node_id 2 for calling the TextGetMD5 obj's underlying member method code with example usage: obj.test_get_md5() without return types