class_docstr: Test the Ubuntu Corpus trainer class.
class_docstr_tok: ["Test","the","Ubuntu","Corpus","trainer","class","."]
code: def setUp(self):
      super().setUp()
      self.trainer = UbuntuCorpusTrainer(
          self.chatbot,
          ubuntu_corpus_data_directory="./.ubuntu_test_data/",
          show_training_progress=False,
      )
  
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 1 for calling the UbuntuCorpusTrainerTestCase obj's underlying member method code with example usage: obj.setUp() without return types