code: def test_window_around_index_start(self, attacked_text):
      assert (
          attacked_text.text_window_around_index(0, 3)
          == "A person walks"
      )
  
imports: import collections
  import pytest
label_desc: Use image node_id 4 for calling the TestAttackedText obj's underlying member method code with example usage: obj.test_window_around_index_start(attacked_text) without return types