code: def test_word_replacement(self, attacked_text):
      assert (
          attacked_text.replace_word_at_index(3, "down").text
          == "A person walks down stairs into a room and sees beer poured from a keg and people talking."
      )
      assert (
          attacked_text.replace_word_at_index(10, "wine").text
          == "A person walks up stairs into a room and sees wine poured from a keg and people talking."
      )
  
imports: import collections
  import pytest
label_desc: Use image node_id 9 for calling the TestAttackedText obj's underlying member method code with example usage: obj.test_word_replacement(attacked_text) without return types