code: def setUp(self):
      text = self.text
      text.insert("1.0", code_sample)
      text.undo_block_start.reset_mock()
      text.undo_block_stop.reset_mock()
      zz = self.zz = zzdummy.ZzDummy(self.editor)
      zzdummy.ZzDummy.ztext = "# ignore #"
  
imports: from idlelib import zzdummy
  import unittest
  from test.support import requires
  from tkinter import Tk, Text
  from unittest import mock
  from idlelib import config
  from idlelib import editor
  from idlelib import format
label_desc: Use image node_id 3 for calling the ZZDummyTest obj's underlying member method code with example usage: obj.setUp() without return types