class_docstr: Test the Ubuntu Corpus trainer class.
class_docstr_tok: ["Test","the","Ubuntu","Corpus","trainer","class","."]
docstr: Test the download function for the Ubuntu corpus trainer.
docstr_tok: ["Test","the","download","function","for","the","Ubuntu","corpus","trainer","."]
code: def test_download(self):
      """
      Test the download function for the Ubuntu corpus trainer.
      """
      import requests
  
      requests.get = Mock(side_effect=self._mock_get_response)
      download_url = "https://example.com/download.tgz"
      self.trainer.download(download_url, show_status=False)
  
      file_name = download_url.split("/")[-1]
      downloaded_file_path = os.path.join(
          self.trainer.data_directory, file_name
      )
  
      requests.get.assert_called_with(download_url, stream=True)
      self.assertTrue(os.path.exists(downloaded_file_path))
  
      # Remove the dummy download_url
      os.remove(downloaded_file_path)
  
imports: from unittest.mock import Mock
  from io import BytesIO
  import tarfile
  import os
  from tests.base_case import ChatBotTestCase
  from chatterbot.trainers import UbuntuCorpusTrainer
label_desc: Use image node_id 8 for calling the UbuntuCorpusTrainerTestCase obj's underlying member method code with example usage: obj.test_download() without return types