class_docstr: Test that the search algorithm works correctly with the
  Levenshtein distance comparison function.
class_docstr_tok: ["Test","that","the","search","algorithm","works","correctly","with","the","Levenshtein","distance","comparison","function","."]
code: def test_confidence_exact_match(self):
      self.chatbot.storage.create(
          text="What is your quest?",
          in_response_to="What is your quest?",
      )
  
      statement = Statement(text="What is your quest?")
      results = list(self.search_algorithm.search(statement))
  
      self.assertIsLength(results, 1)
      self.assertEqual(results[0].confidence, 1)
  
imports: from tests.base_case import ChatBotTestCase
  from chatterbot.conversation import Statement
  from chatterbot.search import TextSearch, IndexedTextSearch
  from chatterbot import comparisons
label_desc: Use image node_id 3 for calling the IndexedTextSearchComparisonFunctionLevenshteinDistanceComparisonTests obj's underlying member method code with example usage: obj.test_confidence_exact_match() without return types