docstr: If empty input is provided, anything may be returned.
docstr_tok: ["If","empty","input","is","provided",",","anything","may","be","returned","."]
code: def test_empty_input(self):
      """
      If empty input is provided, anything may be returned.
      """
      response = self.chatbot.get_response("")
  
      self.assertTrue(len(response.text) >= 0)
  
imports: from tests.base_case import ChatBotTestCase
  from chatterbot.trainers import ListTrainer
  from chatterbot import preprocessors
label_desc: Use image node_id 5 for calling the ChatterBotResponseTests obj's underlying member method code with example usage: obj.test_empty_input() without return types