class_docstr: Simulate user clicking [Close] button
class_docstr_tok: ["Simulate","user","clicking","[","Close","]","button"]
code: def setUpClass(cls):
      requires("gui")
      cls.root = Tk()
      cls.root.withdraw()
      cls.dialog = About(cls.root, "About IDLE", _utest=True)
  
imports: from idlelib import help_about
  import unittest
  from test.support import requires, findfile
  from tkinter import Tk, TclError
  from idlelib.idle_test.mock_idle import Func
  from idlelib.idle_test.mock_tk import Mbox_func
  from idlelib import textview
  import os.path
  from platform import python_version
label_desc: Use image node_id 1 for calling the CloseTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types