bpo-45979: Fix Tkinter tests with old Tk (>= 8.5.12) (GH-31938)

Author: serhiy-storchaka

Lib/tkinter/test/test_tkinter/test_widgets.py

@@ -800,7 +800,7 @@ def test_configure_activestyle(self):
         self.checkEnumParam(widget, 'activestyle',
                             'dotbox', 'none', 'underline')
 
-    test_justify = requires_tcl(8, 6, 5)(StandardOptionsTests.test_configure_justify)
+    test_configure_justify = requires_tcl(8, 6, 5)(StandardOptionsTests.test_configure_justify)
 
     def test_configure_listvariable(self):
         widget = self.create()
@@ -939,7 +939,7 @@ def test_configure_digits(self):
 
     def test_configure_from(self):
         widget = self.create()
-        conv = False if get_tk_patchlevel() >= (8, 6, 10) else float_round
+        conv = float if get_tk_patchlevel() >= (8, 6, 10) else float_round
         self.checkFloatParam(widget, 'from', 100, 14.9, 15.1, conv=conv)
 
     def test_configure_label(self):

Lib/tkinter/test/test_ttk/test_style.py

@@ -4,7 +4,7 @@
 from tkinter import ttk
 from test import support
 from test.support import requires
-from tkinter.test.support import AbstractTkTest
+from tkinter.test.support import AbstractTkTest, get_tk_patchlevel
 
 requires('gui')
 
@@ -170,6 +170,8 @@ def test_map_custom_copy(self):
                     newname = f'C.{name}'
                     self.assertEqual(style.map(newname), {})
                     style.map(newname, **default)
+                    if theme == 'alt' and name == '.' and get_tk_patchlevel() < (8, 6, 1):
+                        default['embossed'] = [('disabled', '1')]
                     self.assertEqual(style.map(newname), default)
                     for key, value in default.items():
                         self.assertEqual(style.map(newname, key), value)