code: def test_load_corpus_english_greetings(self):
      data_files = corpus.list_corpus_files(
          "chatterbot.corpus.english.greetings"
      )
      corpus_data = list(corpus.load_corpus(*data_files))
  
      self.assertEqual(len(corpus_data), 1)
  
      conversations, categories, file_path = corpus_data[0]
  
      self.assertIn(["Hi", "Hello"], conversations)
      self.assertEqual(["greetings"], categories)
      self.assertIn(
          "chatterbot_corpus/data/english/greetings.yml", file_path
      )
  
imports: import os
  import io
  from unittest import TestCase
  from chatterbot import corpus
label_desc: Use image node_id 3 for calling the CorpusLoadingTestCase obj's underlying member method code with example usage: obj.test_load_corpus_english_greetings() without return types