bpo-43013: Fix old tkinter module names in idlelib (GH-24326)

Lowercase 'tkColorChooser', 'tkFileDialog', 'tkSimpleDialog', and
'tkMessageBox' and remove 'tk'.  Just lowercase 'tkFont' as 'font'
is already used.  Adjust import.

Lib/idlelib/idle_test/mock_tk.py

@@ -59,27 +59,26 @@ class Mbox_func:
 class Mbox:
     """Mock for tkinter.messagebox with an Mbox_func for each function.
 
-    This module was 'tkMessageBox' in 2.x; hence the 'import as' in  3.x.
     Example usage in test_module.py for testing functions in module.py:
     ---
 from idlelib.idle_test.mock_tk import Mbox
 import module
 
-orig_mbox = module.tkMessageBox
+orig_mbox = module.messagebox
 showerror = Mbox.showerror  # example, for attribute access in test methods
 
 class Test(unittest.TestCase):
 
     @classmethod
     def setUpClass(cls):
-        module.tkMessageBox = Mbox
+        module.messagebox = Mbox
 
     @classmethod
     def tearDownClass(cls):
-        module.tkMessageBox = orig_mbox
+        module.messagebox = orig_mbox
     ---
     For 'ask' functions, set func.result return value before calling the method
-    that uses the message function. When tkMessageBox functions are the
+    that uses the message function. When messagebox functions are the
     only gui alls in a method, this replacement makes the method gui-free,
     """
     askokcancel = Mbox_func()     # True or False

Lib/idlelib/idle_test/test_configdialog.py

@@ -423,7 +423,7 @@ class HighPageTest(unittest.TestCase):
     def test_color(self):
         d = self.page
         d.on_new_color_set = Func()
-        # self.color is only set in get_color through ColorChooser.
+        # self.color is only set in get_color through colorchooser.
         d.color.set('green')
         self.assertEqual(d.on_new_color_set.called, 1)
         del d.on_new_color_set
@@ -540,8 +540,8 @@ class HighPageTest(unittest.TestCase):
     def test_get_color(self):
         eq = self.assertEqual
         d = self.page
-        orig_chooser = configdialog.tkColorChooser.askcolor
-        chooser = configdialog.tkColorChooser.askcolor = Func()
+        orig_chooser = configdialog.colorchooser.askcolor
+        chooser = configdialog.colorchooser.askcolor = Func()
         gntn = d.get_new_theme_name = Func()
 
         d.highlight_target.set('Editor Breakpoint')
@@ -582,7 +582,7 @@ class HighPageTest(unittest.TestCase):
         eq(d.color.get(), '#de0000')
 
         del d.get_new_theme_name
-        configdialog.tkColorChooser.askcolor = orig_chooser
+        configdialog.colorchooser.askcolor = orig_chooser
 
     def test_on_new_color_set(self):
         d = self.page

Lib/idlelib/idle_test/test_replace.py

@@ -10,7 +10,7 @@ from unittest.mock import Mock
 from idlelib.idle_test.mock_tk import Mbox
 import idlelib.searchengine as se
 
-orig_mbox = se.tkMessageBox
+orig_mbox = se.messagebox
 showerror = Mbox.showerror
 
 
@@ -20,7 +20,7 @@ class ReplaceDialogTest(unittest.TestCase):
     def setUpClass(cls):
         cls.root = Tk()
         cls.root.withdraw()
-        se.tkMessageBox = Mbox
+        se.messagebox = Mbox
         cls.engine = se.SearchEngine(cls.root)
         cls.dialog = ReplaceDialog(cls.root, cls.engine)
         cls.dialog.bell = lambda: None
@@ -32,7 +32,7 @@ class ReplaceDialogTest(unittest.TestCase):
 
     @classmethod
     def tearDownClass(cls):
-        se.tkMessageBox = orig_mbox
+        se.messagebox = orig_mbox
         del cls.text, cls.dialog, cls.engine
         cls.root.destroy()
         del cls.root

Lib/idlelib/idle_test/test_searchengine.py

@@ -4,7 +4,7 @@ from idlelib import searchengine as se
 import unittest
 # from test.support import requires
 from tkinter import  BooleanVar, StringVar, TclError  # ,Tk, Text
-import tkinter.messagebox as tkMessageBox
+from tkinter import messagebox
 from idlelib.idle_test.mock_tk import Var, Mbox
 from idlelib.idle_test.mock_tk import Text as mockText
 import re
@@ -19,13 +19,13 @@ def setUpModule():
     # Replace s-e module tkinter imports other than non-gui TclError.
     se.BooleanVar = Var
     se.StringVar = Var
-    se.tkMessageBox = Mbox
+    se.messagebox = Mbox
 
 def tearDownModule():
     # Restore 'just in case', though other tests should also replace.
     se.BooleanVar = BooleanVar
     se.StringVar = StringVar
-    se.tkMessageBox = tkMessageBox
+    se.messagebox = messagebox
 
 
 class Mock:

Lib/idlelib/idle_test/test_squeezer.py

@@ -396,7 +396,7 @@ class ExpandingButtonTest(unittest.TestCase):
         expandingbutton.base_text = expandingbutton.text
 
         # Patch the message box module to always return False.
-        with patch('idlelib.squeezer.tkMessageBox') as mock_msgbox:
+        with patch('idlelib.squeezer.messagebox') as mock_msgbox:
             mock_msgbox.askokcancel.return_value = False
             mock_msgbox.askyesno.return_value = False
             # Trigger the expand event.
@@ -407,7 +407,7 @@ class ExpandingButtonTest(unittest.TestCase):
         self.assertEqual(expandingbutton.text.get('1.0', 'end-1c'), '')
 
         # Patch the message box module to always return True.
-        with patch('idlelib.squeezer.tkMessageBox') as mock_msgbox:
+        with patch('idlelib.squeezer.messagebox') as mock_msgbox:
             mock_msgbox.askokcancel.return_value = True
             mock_msgbox.askyesno.return_value = True
             # Trigger the expand event.