docstr: Test the case where a single statement is known, but
  it is not in response to any other statement.
docstr_tok: ["Test","the","case","where","a","single","statement","is","known",",","but","it","is","not","in","response","to","any","other","statement","."]
code: def test_one_statement_known_no_response(self):
      """
      Test the case where a single statement is known, but
      it is not in response to any other statement.
      """
      self.chatbot.storage.create(text="Hello", in_response_to=None)
  
      response = self.chatbot.get_response("Hi")
  
      self.assertEqual(response.confidence, 0)
      self.assertEqual(response.text, "Hello")
  
imports: from tests.base_case import ChatBotTestCase
  from chatterbot.logic import LogicAdapter
  from chatterbot.conversation import Statement
label_desc: Use image node_id 5 for calling the ChatterBotResponseTestCase obj's underlying member method code with example usage: obj.test_one_statement_known_no_response() without return types