code: def test_filter_equal_results(self):
      statement1 = Statement(text="Testing...", in_response_to=[])
      statement2 = Statement(
          text="Testing one, two, three.", in_response_to=[]
      )
      self.adapter.update(statement1)
      self.adapter.update(statement2)
  
      results = list(self.adapter.filter(in_response_to=[]))
  
      results_text = [result.text for result in results]
  
      self.assertEqual(len(results), 2)
      self.assertIn(statement1.text, results_text)
      self.assertIn(statement2.text, results_text)
  
imports: from unittest import TestCase
  from chatterbot.storage import MongoDatabaseAdapter
  from chatterbot.conversation import Statement
label_desc: Use image node_id 3 for calling the MongoAdapterFilterTestCase obj's underlying member method code with example usage: obj.test_filter_equal_results() without return types