code: def test_setcookedpat(self):
      engine = self.engine
      engine.setcookedpat(r"\s")
      self.assertEqual(engine.getpat(), r"\s")
      engine.revar.set(1)
      engine.setcookedpat(r"\s")
      self.assertEqual(engine.getpat(), r"\\s")
  
imports: from idlelib import searchengine
  import unittest
  from tkinter import BooleanVar, StringVar, TclError
  from tkinter import messagebox
  from idlelib.idle_test.mock_tk import Var, Mbox
  from idlelib.idle_test.mock_tk import Text
  import re
label_desc: Use image node_id 3 for calling the SearchEngineTest obj's underlying member method code with example usage: obj.test_setcookedpat() without return types