code: def setUpClass(cls):
      requires("gui")
      cls.root = Tk()
      cls.root.withdraw()
  
imports: import unittest
  import os
  from test.test_support import requires
  from Tkinter import Tk
  from idlelib import textView
  from idlelib.idle_test.mock_idle import Func
  from idlelib.idle_test.mock_tk import Mbox
label_desc: Use image node_id 1 for calling the textviewClassTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types