code: def test_update_adds_new_statement(self):
      self.adapter.create(text="New statement")
  
      results = list(self.adapter.filter(text="New statement"))
  
      self.assertEqual(len(results), 1)
      self.assertEqual(results[0].text, "New statement")
  
imports: from unittest import TestCase
  from chatterbot.storage import MongoDatabaseAdapter
  from chatterbot.conversation import Statement
label_desc: Use image node_id 5 for calling the MongoDatabaseAdapterTestCase obj's underlying member method code with example usage: obj.test_update_adds_new_statement() without return types