Issue #22236: Tkinter tests now don't reuse default root window. New root

window is created for every test class.

Fixed Tkinter images copying operations in NoDefaultRoot mode.

Tcl command names generated for "after" callbacks now contains a name of
original function.

Lib/test/test_ttk_guionly.py

@@ -6,7 +6,7 @@
 support.import_module('_tkinter')
 
 # Make sure tkinter._fix runs to set up the environment
-support.import_fresh_module('tkinter')
+tkinter = support.import_fresh_module('tkinter')
 
 # Skip test if tk cannot be initialized.
 support.requires('gui')
@@ -14,20 +14,24 @@
 from _tkinter import TclError
 from tkinter import ttk
 from tkinter.test import runtktests
-from tkinter.test.support import get_tk_root
 
+root = None
 try:
-    ttk.Button()
+    root = tkinter.Tk()
+    button = ttk.Button(root)
+    button.destroy()
+    del button
 except TclError as msg:
     # assuming ttk is not available
     raise unittest.SkipTest("ttk not available: %s" % msg)
+finally:
+    if root is not None:
+        root.destroy()
+    del root
 
 def test_main():
-    try:
     support.run_unittest(
             *runtktests.get_tests(text=False, packages=['test_ttk']))
-    finally:
-        get_tk_root().destroy()
 
 if __name__ == '__main__':
     test_main()

Lib/tkinter/__init__.py

@@ -562,6 +562,7 @@ def callit():
                         self.deletecommand(name)
                     except TclError:
                         pass
+            callit.__name__ = func.__name__
             name = self._register(callit)
             return self.tk.call('after', ms, name)
     def after_idle(self, func, *args):
@@ -3351,7 +3352,7 @@ def __init__(self, imgtype, name=None, cnf={}, master=None, **kw):
             master = _default_root
             if not master:
                 raise RuntimeError('Too early to create image')
-        self.tk = master.tk
+        self.tk = getattr(master, 'tk', master)
         if not name:
             Image._last_id += 1
             name = "pyimage%r" % (Image._last_id,) # tk itself would use image<x>
@@ -3422,20 +3423,20 @@ def __getitem__(self, key):
     # XXX copy -from, -to, ...?
     def copy(self):
         """Return a new PhotoImage with the same image as this widget."""
-        destImage = PhotoImage()
+        destImage = PhotoImage(master=self.tk)
         self.tk.call(destImage, 'copy', self.name)
         return destImage
     def zoom(self,x,y=''):
         """Return a new PhotoImage with the same image as this widget
         but zoom it with X and Y."""
-        destImage = PhotoImage()
+        destImage = PhotoImage(master=self.tk)
         if y=='': y=x
         self.tk.call(destImage, 'copy', self.name, '-zoom',x,y)
         return destImage
     def subsample(self,x,y=''):
         """Return a new PhotoImage based on the same image as this widget
         but use only every Xth or Yth pixel."""
-        destImage = PhotoImage()
+        destImage = PhotoImage(master=self.tk)
         if y=='': y=x
         self.tk.call(destImage, 'copy', self.name, '-subsample',x,y)
         return destImage

Lib/tkinter/test/support.py

@@ -3,30 +3,43 @@
 import unittest
 from test.support import requires
 
-def get_tk_root():
+class AbstractTkTest:
-    requires('gui')             # raise exception if tk unavailable
+
+    @classmethod
+    def setUpClass(cls):
+        cls._old_support_default_root = tkinter._support_default_root
+        destroy_default_root()
+        tkinter.NoDefaultRoot()
+        cls.root = tkinter.Tk()
+        cls.wantobjects = cls.root.wantobjects()
+        # De-maximize main window.
+        # Some window managers can maximize new windows.
+        cls.root.wm_state('normal')
         try:
-        root = tkinter._default_root
+            cls.root.wm_attributes('-zoomed', False)
-    except AttributeError:
+        except tkinter.TclError:
-        # it is possible to disable default root in Tkinter, although
+            pass
-        # I haven't seen people doing it (but apparently someone did it
-        # here).
-        root = None
 
-    if root is None:
+    @classmethod
-        # create a new master only if there isn't one already
+    def tearDownClass(cls):
-        root = tkinter.Tk()
+        cls.root.destroy()
+        cls.root = None
+        tkinter._default_root = None
+        tkinter._support_default_root = cls._old_support_default_root
 
-    return root
+    def setUp(self):
+        self.root.deiconify()
 
-def root_deiconify():
+    def tearDown(self):
-    root = get_tk_root()
+        for w in self.root.winfo_children():
-    root.deiconify()
+            w.destroy()
-
+        self.root.withdraw()
-def root_withdraw():
-    root = get_tk_root()
-    root.withdraw()
 
+def destroy_default_root():
+    if getattr(tkinter, '_default_root', None):
+        tkinter._default_root.update_idletasks()
+        tkinter._default_root.destroy()
+        tkinter._default_root = None
 
 def simulate_mouse_click(widget, x, y):
     """Generate proper events to click at the x, y position (tries to act

Lib/tkinter/test/test_tkinter/test_font.py

@@ -2,26 +2,20 @@
 import tkinter
 from tkinter import font
 from test.support import requires, run_unittest
-import tkinter.test.support as support
+from tkinter.test.support import AbstractTkTest
 
 requires('gui')
 
-class FontTest(unittest.TestCase):
+class FontTest(AbstractTkTest, unittest.TestCase):
-
-    def setUp(self):
-        support.root_deiconify()
-
-    def tearDown(self):
-        support.root_withdraw()
 
     def test_font_eq(self):
         fontname = "TkDefaultFont"
         try:
-            f = font.Font(name=fontname, exists=True)
+            f = font.Font(root=self.root, name=fontname, exists=True)
         except tkinter._tkinter.TclError:
-            f = font.Font(name=fontname, exists=False)
+            f = font.Font(root=self.root, name=fontname, exists=False)
-        font1 = font.nametofont(fontname)
+        font1 = font.Font(root=self.root, name=fontname, exists=True)
-        font2 = font.nametofont(fontname)
+        font2 = font.Font(root=self.root, name=fontname, exists=True)
         self.assertIsNot(font1, font2)
         self.assertEqual(font1, font2)
         self.assertNotEqual(font1, font1.copy())

Lib/tkinter/test/test_tkinter/test_geometry_managers.py

@@ -278,7 +278,7 @@ class PlaceTest(AbstractWidgetTest, unittest.TestCase):
 
     def create2(self):
         t = tkinter.Toplevel(self.root, width=300, height=200, bd=0)
-        t.wm_geometry('+0+0')
+        t.wm_geometry('300x200+0+0')
         f = tkinter.Frame(t, width=154, height=84, bd=2, relief='raised')
         f.place_configure(x=48, y=38)
         f2 = tkinter.Frame(t, width=30, height=60, bd=2, relief='raised')
@@ -479,7 +479,6 @@ def test_place_slaves(self):
 class GridTest(AbstractWidgetTest, unittest.TestCase):
 
     def tearDown(self):
-        super().tearDown()
         cols, rows = self.root.grid_size()
         for i in range(cols + 1):
             self.root.grid_columnconfigure(i, weight=0, minsize=0, pad=0, uniform='')
@@ -488,10 +487,10 @@ def tearDown(self):
         self.root.grid_propagate(1)
         if tcl_version >= (8, 5):
             self.root.grid_anchor('nw')
+        super().tearDown()
 
     def test_grid_configure(self):
         b = tkinter.Button(self.root)
-        self.addCleanup(b.destroy)
         self.assertEqual(b.grid_info(), {})
         b.grid_configure()
         self.assertEqual(b.grid_info()['in'], self.root)
@@ -578,7 +577,6 @@ def test_grid_configure_pady(self):
 
     def test_grid_configure_row(self):
         b = tkinter.Button(self.root)
-        self.addCleanup(b.destroy)
         with self.assertRaisesRegex(TclError, 'bad (row|grid) value "-1": '
                                     'must be a non-negative integer'):
             b.grid_configure(row=-1)
@@ -795,7 +793,7 @@ def test_grid_bbox(self):
             self.root.grid_bbox(0, 0, 0, 'x')
         with self.assertRaises(TypeError):
             self.root.grid_bbox(0, 0, 0, 0, 0)
-        t = tkinter.Toplevel(self.root)
+        t = self.root
         # de-maximize
         t.wm_geometry('1x1+0+0')
         t.wm_geometry('')
@@ -823,7 +821,7 @@ def test_grid_location(self):
             self.root.grid_location('x', 'y')
         with self.assertRaisesRegex(TclError, 'bad screen distance "y"'):
             self.root.grid_location('1c', 'y')
-        t = tkinter.Toplevel(self.root)
+        t = self.root
         # de-maximize
         t.wm_geometry('1x1+0+0')
         t.wm_geometry('')

Lib/tkinter/test/test_tkinter/test_images.py

@@ -1,16 +1,12 @@
 import unittest
 import tkinter
-from tkinter import ttk
 from test import support
-from tkinter.test.support import requires_tcl
+from tkinter.test.support import AbstractTkTest, requires_tcl
 
 support.requires('gui')
 
 
-class MiscTest(unittest.TestCase):
+class MiscTest(AbstractTkTest, unittest.TestCase):
-
-    def setUp(self):
-        self.root = ttk.setup_master()
 
     def test_image_types(self):
         image_types = self.root.image_types()
@@ -23,15 +19,13 @@ def test_image_names(self):
         self.assertIsInstance(image_names, tuple)
 
 
-class BitmapImageTest(unittest.TestCase):
+class BitmapImageTest(AbstractTkTest, unittest.TestCase):
 
     @classmethod
     def setUpClass(cls):
+        AbstractTkTest.setUpClass.__func__(cls)
         cls.testfile = support.findfile('python.xbm', subdir='imghdrdata')
 
-    def setUp(self):
-        self.root = ttk.setup_master()
-
     def test_create_from_file(self):
         image = tkinter.BitmapImage('::img::test', master=self.root,
                                     foreground='yellow', background='blue',
@@ -107,16 +101,13 @@ def test_configure_foreground(self):
                          '-foreground {} {} #000000 yellow')
 
 
-class PhotoImageTest(unittest.TestCase):
+class PhotoImageTest(AbstractTkTest, unittest.TestCase):
 
     @classmethod
     def setUpClass(cls):
+        AbstractTkTest.setUpClass.__func__(cls)
         cls.testfile = support.findfile('python.gif', subdir='imghdrdata')
 
-    def setUp(self):
-        self.root = ttk.setup_master()
-        self.wantobjects = self.root.wantobjects()
-
     def create(self):
         return tkinter.PhotoImage('::img::test', master=self.root,
                                   file=self.testfile)

Lib/tkinter/test/test_tkinter/test_misc.py

@@ -1,14 +1,11 @@
 import unittest
 import tkinter
-from tkinter import ttk
 from test import support
+from tkinter.test.support import AbstractTkTest
 
 support.requires('gui')
 
-class MiscTest(unittest.TestCase):
+class MiscTest(AbstractTkTest, unittest.TestCase):
-
-    def setUp(self):
-        self.root = ttk.setup_master()
 
     def test_tk_setPalette(self):
         root = self.root

Lib/tkinter/test/test_tkinter/test_text.py

@@ -1,19 +1,16 @@
 import unittest
 import tkinter
 from test.support import requires, run_unittest
-from tkinter.ttk import setup_master
+from tkinter.test.support import AbstractTkTest
 
 requires('gui')
 
-class TextTest(unittest.TestCase):
+class TextTest(AbstractTkTest, unittest.TestCase):
 
     def setUp(self):
-        self.root = setup_master()
+        super().setUp()
         self.text = tkinter.Text(self.root)
 
-    def tearDown(self):
-        self.text.destroy()
-
     def test_debug(self):
         text = self.text
         olddebug = text.debug()

Lib/tkinter/test/test_tkinter/test_variables.py

@@ -1,6 +1,6 @@
 import unittest
 
-from tkinter import Variable, StringVar, IntVar, DoubleVar, BooleanVar, Tk
+from tkinter import Variable, StringVar, IntVar, DoubleVar, BooleanVar, Tcl
 
 
 class Var(Variable):
@@ -16,10 +16,10 @@ def set(self, value):
 class TestBase(unittest.TestCase):
 
     def setUp(self):
-        self.root = Tk()
+        self.root = Tcl()
 
     def tearDown(self):
-        self.root.destroy()
+        del self.root
 
 
 class TestVariable(TestBase):
@@ -81,7 +81,7 @@ def test_null_in_name(self):
             self.root.setvar(b'var\x00name', "value")
 
     def test_initialize(self):
-        v = Var()
+        v = Var(self.root)
         self.assertFalse(v.side_effect)
         v.set("value")
         self.assertTrue(v.side_effect)

Lib/tkinter/test/test_tkinter/test_widgets.py

@@ -66,7 +66,7 @@ class ToplevelTest(AbstractToplevelTest, unittest.TestCase):
         'takefocus', 'use', 'visual', 'width',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Toplevel(self.root, **kwargs)
 
     def test_menu(self):
@@ -105,7 +105,7 @@ class FrameTest(AbstractToplevelTest, unittest.TestCase):
         'relief', 'takefocus', 'visual', 'width',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Frame(self.root, **kwargs)
 
 
@@ -120,7 +120,7 @@ class LabelFrameTest(AbstractToplevelTest, unittest.TestCase):
         'takefocus', 'text', 'visual', 'width',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.LabelFrame(self.root, **kwargs)
 
     def test_labelanchor(self):
@@ -158,7 +158,7 @@ class LabelTest(AbstractLabelTest, unittest.TestCase):
         'underline', 'width', 'wraplength',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Label(self.root, **kwargs)
 
 
@@ -175,7 +175,7 @@ class ButtonTest(AbstractLabelTest, unittest.TestCase):
         'state', 'takefocus', 'text', 'textvariable',
         'underline', 'width', 'wraplength')
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Button(self.root, **kwargs)
 
     def test_default(self):
@@ -199,7 +199,7 @@ class CheckbuttonTest(AbstractLabelTest, unittest.TestCase):
         'underline', 'variable', 'width', 'wraplength',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Checkbutton(self.root, **kwargs)
 
 
@@ -227,7 +227,7 @@ class RadiobuttonTest(AbstractLabelTest, unittest.TestCase):
         'underline', 'value', 'variable', 'width', 'wraplength',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Radiobutton(self.root, **kwargs)
 
     def test_value(self):
@@ -250,7 +250,7 @@ class MenubuttonTest(AbstractLabelTest, unittest.TestCase):
     )
     _conv_pixels = staticmethod(pixels_round)
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Menubutton(self.root, **kwargs)
 
     def test_direction(self):
@@ -268,7 +268,7 @@ def test_height(self):
                      'crashes with Cocoa Tk (issue19733)')
     def test_image(self):
         widget = self.create()
-        image = tkinter.PhotoImage('image1')
+        image = tkinter.PhotoImage(master=self.root, name='image1')
         self.checkParam(widget, 'image', image, conv=str)
         errmsg = 'image "spam" doesn\'t exist'
         with self.assertRaises(tkinter.TclError) as cm:
@@ -303,7 +303,7 @@ def test_width(self):
 
 class OptionMenuTest(MenubuttonTest, unittest.TestCase):
 
-    def _create(self, default='b', values=('a', 'b', 'c'), **kwargs):
+    def create(self, default='b', values=('a', 'b', 'c'), **kwargs):
         return tkinter.OptionMenu(self.root, None, default, *values, **kwargs)
 
 
@@ -322,7 +322,7 @@ class EntryTest(AbstractWidgetTest, unittest.TestCase):
         'validate', 'validatecommand', 'width', 'xscrollcommand',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Entry(self.root, **kwargs)
 
     def test_disabledbackground(self):
@@ -396,7 +396,7 @@ class SpinboxTest(EntryTest, unittest.TestCase):
         'width', 'wrap', 'xscrollcommand',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Spinbox(self.root, **kwargs)
 
     test_show = None
@@ -490,9 +490,9 @@ class TextTest(AbstractWidgetTest, unittest.TestCase):
         'xscrollcommand', 'yscrollcommand',
     )
     if tcl_version < (8, 5):
-        wantobjects = False
+        _stringify = True
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Text(self.root, **kwargs)
 
     def test_autoseparators(self):
@@ -644,9 +644,9 @@ class CanvasTest(AbstractWidgetTest, unittest.TestCase):
     )
 
     _conv_pixels = round
-    wantobjects = False
+    _stringify = True
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Canvas(self.root, **kwargs)
 
     def test_closeenough(self):
@@ -699,7 +699,7 @@ class ListboxTest(AbstractWidgetTest, unittest.TestCase):
         'takefocus', 'width', 'xscrollcommand', 'yscrollcommand',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Listbox(self.root, **kwargs)
 
     def test_activestyle(self):
@@ -709,7 +709,7 @@ def test_activestyle(self):
 
     def test_listvariable(self):
         widget = self.create()
-        var = tkinter.DoubleVar()
+        var = tkinter.DoubleVar(self.root)
         self.checkVariableParam(widget, 'listvariable', var)
 
     def test_selectmode(self):
@@ -831,7 +831,7 @@ class ScaleTest(AbstractWidgetTest, unittest.TestCase):
     )
     default_orient = 'vertical'
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Scale(self.root, **kwargs)
 
     def test_bigincrement(self):
@@ -897,10 +897,10 @@ class ScrollbarTest(AbstractWidgetTest, unittest.TestCase):
         'takefocus', 'troughcolor', 'width',
     )
     _conv_pixels = round
-    wantobjects = False
+    _stringify = True
     default_orient = 'vertical'
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Scrollbar(self.root, **kwargs)
 
     def test_activerelief(self):
@@ -946,7 +946,7 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
     )
     default_orient = 'horizontal'
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.PanedWindow(self.root, **kwargs)
 
     def test_handlepad(self):
@@ -1104,7 +1104,7 @@ class MenuTest(AbstractWidgetTest, unittest.TestCase):
     )
     _conv_pixels = noconv
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Menu(self.root, **kwargs)
 
     def test_postcommand(self):
@@ -1173,7 +1173,7 @@ class MessageTest(AbstractWidgetTest, unittest.TestCase):
     )
     _conv_pad_pixels = noconv
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return tkinter.Message(self.root, **kwargs)
 
     def test_aspect(self):

Lib/tkinter/test/test_ttk/test_extensions.py

@@ -2,34 +2,30 @@
 import unittest
 import tkinter
 from tkinter import ttk
-from test.support import requires, run_unittest
+from test.support import requires, run_unittest, swap_attr
-
+from tkinter.test.support import AbstractTkTest, destroy_default_root
-import tkinter.test.support as support
 
 requires('gui')
 
-class LabeledScaleTest(unittest.TestCase):
+class LabeledScaleTest(AbstractTkTest, unittest.TestCase):
-
-    def setUp(self):
-        support.root_deiconify()
 
     def tearDown(self):
-        support.root_withdraw()
+        self.root.update_idletasks()
-
+        super().tearDown()
 
     def test_widget_destroy(self):
         # automatically created variable
-        x = ttk.LabeledScale()
+        x = ttk.LabeledScale(self.root)
         var = x._variable._name
         x.destroy()
         self.assertRaises(tkinter.TclError, x.tk.globalgetvar, var)
 
         # manually created variable
-        myvar = tkinter.DoubleVar()
+        myvar = tkinter.DoubleVar(self.root)
         name = myvar._name
-        x = ttk.LabeledScale(variable=myvar)
+        x = ttk.LabeledScale(self.root, variable=myvar)
         x.destroy()
-        if x.tk.wantobjects():
+        if self.wantobjects:
             self.assertEqual(x.tk.globalgetvar(name), myvar.get())
         else:
             self.assertEqual(float(x.tk.globalgetvar(name)), myvar.get())
@@ -37,26 +33,36 @@ def test_widget_destroy(self):
         self.assertRaises(tkinter.TclError, x.tk.globalgetvar, name)
 
         # checking that the tracing callback is properly removed
-        myvar = tkinter.IntVar()
+        myvar = tkinter.IntVar(self.root)
         # LabeledScale will start tracing myvar
-        x = ttk.LabeledScale(variable=myvar)
+        x = ttk.LabeledScale(self.root, variable=myvar)
         x.destroy()
         # Unless the tracing callback was removed, creating a new
         # LabeledScale with the same var will cause an error now. This
         # happens because the variable will be set to (possibly) a new
         # value which causes the tracing callback to be called and then
         # it tries calling instance attributes not yet defined.
-        ttk.LabeledScale(variable=myvar)
+        ttk.LabeledScale(self.root, variable=myvar)
         if hasattr(sys, 'last_type'):
             self.assertNotEqual(sys.last_type, tkinter.TclError)
 
 
+    def test_initialization_no_master(self):
+        # no master passing
+        with swap_attr(tkinter, '_default_root', None), \
+             swap_attr(tkinter, '_support_default_root', True):
+            try:
+                x = ttk.LabeledScale()
+                self.assertIsNotNone(tkinter._default_root)
+                self.assertEqual(x.master, tkinter._default_root)
+                self.assertEqual(x.tk, tkinter._default_root.tk)
+                x.destroy()
+            finally:
+                destroy_default_root()
+
     def test_initialization(self):
         # master passing
-        x = ttk.LabeledScale()
+        master = tkinter.Frame(self.root)
-        self.assertEqual(x.master, tkinter._default_root)
-        x.destroy()
-        master = tkinter.Frame()
         x = ttk.LabeledScale(master)
         self.assertEqual(x.master, master)
         x.destroy()
@@ -64,25 +70,25 @@ def test_initialization(self):
         # variable initialization/passing
         passed_expected = (('0', 0), (0, 0), (10, 10),
             (-1, -1), (sys.maxsize + 1, sys.maxsize + 1))
-        if x.tk.wantobjects():
+        if self.wantobjects:
             passed_expected += ((2.5, 2),)
         for pair in passed_expected:
-            x = ttk.LabeledScale(from_=pair[0])
+            x = ttk.LabeledScale(self.root, from_=pair[0])
             self.assertEqual(x.value, pair[1])
             x.destroy()
-        x = ttk.LabeledScale(from_='2.5')
+        x = ttk.LabeledScale(self.root, from_='2.5')
         self.assertRaises(ValueError, x._variable.get)
         x.destroy()
-        x = ttk.LabeledScale(from_=None)
+        x = ttk.LabeledScale(self.root, from_=None)
         self.assertRaises(ValueError, x._variable.get)
         x.destroy()
         # variable should have its default value set to the from_ value
-        myvar = tkinter.DoubleVar(value=20)
+        myvar = tkinter.DoubleVar(self.root, value=20)
-        x = ttk.LabeledScale(variable=myvar)
+        x = ttk.LabeledScale(self.root, variable=myvar)
         self.assertEqual(x.value, 0)
         x.destroy()
         # check that it is really using a DoubleVar
-        x = ttk.LabeledScale(variable=myvar, from_=0.5)
+        x = ttk.LabeledScale(self.root, variable=myvar, from_=0.5)
         self.assertEqual(x.value, 0.5)
         self.assertEqual(x._variable._name, myvar._name)
         x.destroy()
@@ -91,25 +97,26 @@ def test_initialization(self):
         def check_positions(scale, scale_pos, label, label_pos):
             self.assertEqual(scale.pack_info()['side'], scale_pos)
             self.assertEqual(label.place_info()['anchor'], label_pos)
-        x = ttk.LabeledScale(compound='top')
+        x = ttk.LabeledScale(self.root, compound='top')
         check_positions(x.scale, 'bottom', x.label, 'n')
         x.destroy()
-        x = ttk.LabeledScale(compound='bottom')
+        x = ttk.LabeledScale(self.root, compound='bottom')
         check_positions(x.scale, 'top', x.label, 's')
         x.destroy()
-        x = ttk.LabeledScale(compound='unknown') # invert default positions
+        # invert default positions
+        x = ttk.LabeledScale(self.root, compound='unknown')
         check_positions(x.scale, 'top', x.label, 's')
         x.destroy()
-        x = ttk.LabeledScale() # take default positions
+        x = ttk.LabeledScale(self.root) # take default positions
         check_positions(x.scale, 'bottom', x.label, 'n')
         x.destroy()
 
         # extra, and invalid, kwargs
-        self.assertRaises(tkinter.TclError, ttk.LabeledScale, a='b')
+        self.assertRaises(tkinter.TclError, ttk.LabeledScale, master, a='b')
 
 
     def test_horizontal_range(self):
-        lscale = ttk.LabeledScale(from_=0, to=10)
+        lscale = ttk.LabeledScale(self.root, from_=0, to=10)
         lscale.pack()
         lscale.wait_visibility()
         lscale.update()
@@ -128,7 +135,7 @@ def test_horizontal_range(self):
         self.assertNotEqual(prev_xcoord, curr_xcoord)
         # the label widget should have been repositioned too
         linfo_2 = lscale.label.place_info()
-        self.assertEqual(lscale.label['text'], 0 if lscale.tk.wantobjects() else '0')
+        self.assertEqual(lscale.label['text'], 0 if self.wantobjects else '0')
         self.assertEqual(curr_xcoord, int(linfo_2['x']))
         # change the range back
         lscale.scale.configure(from_=0, to=10)
@@ -139,7 +146,7 @@ def test_horizontal_range(self):
 
 
     def test_variable_change(self):
-        x = ttk.LabeledScale()
+        x = ttk.LabeledScale(self.root)
         x.pack()
         x.wait_visibility()
         x.update()
@@ -151,13 +158,13 @@ def test_variable_change(self):
         # at the same time this shouldn't affect test outcome
         x.update()
         self.assertEqual(x.label['text'],
-                         newval if x.tk.wantobjects() else str(newval))
+                         newval if self.wantobjects else str(newval))
         self.assertGreater(x.scale.coords()[0], curr_xcoord)
         self.assertEqual(x.scale.coords()[0],
             int(x.label.place_info()['x']))
 
         # value outside range
-        if x.tk.wantobjects():
+        if self.wantobjects:
             conv = lambda x: x
         else:
             conv = int
@@ -171,7 +178,7 @@ def test_variable_change(self):
 
 
     def test_resize(self):
-        x = ttk.LabeledScale()
+        x = ttk.LabeledScale(self.root)
         x.pack(expand=True, fill='both')
         x.wait_visibility()
         x.update()
@@ -190,20 +197,20 @@ def test_resize(self):
         x.destroy()
 
 
-class OptionMenuTest(unittest.TestCase):
+class OptionMenuTest(AbstractTkTest, unittest.TestCase):
 
     def setUp(self):
-        support.root_deiconify()
+        super().setUp()
-        self.textvar = tkinter.StringVar()
+        self.textvar = tkinter.StringVar(self.root)
 
     def tearDown(self):
         del self.textvar
-        support.root_withdraw()
+        super().tearDown()
 
 
     def test_widget_destroy(self):
-        var = tkinter.StringVar()
+        var = tkinter.StringVar(self.root)
-        optmenu = ttk.OptionMenu(None, var)
+        optmenu = ttk.OptionMenu(self.root, var)
         name = var._name
         optmenu.update_idletasks()
         optmenu.destroy()
@@ -214,9 +221,9 @@ def test_widget_destroy(self):
 
     def test_initialization(self):
         self.assertRaises(tkinter.TclError,
-            ttk.OptionMenu, None, self.textvar, invalid='thing')
+            ttk.OptionMenu, self.root, self.textvar, invalid='thing')
 
-        optmenu = ttk.OptionMenu(None, self.textvar, 'b', 'a', 'b')
+        optmenu = ttk.OptionMenu(self.root, self.textvar, 'b', 'a', 'b')
         self.assertEqual(optmenu._variable.get(), 'b')
 
         self.assertTrue(optmenu['menu'])
@@ -228,7 +235,7 @@ def test_initialization(self):
     def test_menu(self):
         items = ('a', 'b', 'c')
         default = 'a'
-        optmenu = ttk.OptionMenu(None, self.textvar, default, *items)
+        optmenu = ttk.OptionMenu(self.root, self.textvar, default, *items)
         found_default = False
         for i in range(len(items)):
             value = optmenu['menu'].entrycget(i, 'value')
@@ -240,7 +247,7 @@ def test_menu(self):
 
         # default shouldn't be in menu if it is not part of values
         default = 'd'
-        optmenu = ttk.OptionMenu(None, self.textvar, default, *items)
+        optmenu = ttk.OptionMenu(self.root, self.textvar, default, *items)
         curr = None
         i = 0
         while True:
@@ -269,7 +276,7 @@ def test_menu(self):
         def cb_test(item):
             self.assertEqual(item, items[1])
             success.append(True)
-        optmenu = ttk.OptionMenu(None, self.textvar, 'a', command=cb_test,
+        optmenu = ttk.OptionMenu(self.root, self.textvar, 'a', command=cb_test,
             *items)
         optmenu['menu'].invoke(1)
         if not success:

Lib/tkinter/test/test_ttk/test_style.py

@@ -2,15 +2,15 @@
 import tkinter
 from tkinter import ttk
 from test.support import requires, run_unittest
-
+from tkinter.test.support import AbstractTkTest
-import tkinter.test.support as support
 
 requires('gui')
 
-class StyleTest(unittest.TestCase):
+class StyleTest(AbstractTkTest, unittest.TestCase):
 
     def setUp(self):
-        self.style = ttk.Style()
+        super().setUp()
+        self.style = ttk.Style(self.root)
 
 
     def test_configure(self):
@@ -25,7 +25,7 @@ def test_map(self):
         style = self.style
         style.map('TButton', background=[('active', 'background', 'blue')])
         self.assertEqual(style.map('TButton', 'background'),
-            [('active', 'background', 'blue')] if style.tk.wantobjects() else
+            [('active', 'background', 'blue')] if self.wantobjects else
             [('active background', 'blue')])
         self.assertIsInstance(style.map('TButton'), dict)
 

Lib/tkinter/test/test_ttk/test_widgets.py

@@ -4,9 +4,9 @@
 from test.support import requires
 import sys
 
-import tkinter.test.support as support
 from tkinter.test.test_ttk.test_functions import MockTclObj
-from tkinter.test.support import tcl_version, get_tk_patchlevel
+from tkinter.test.support import (AbstractTkTest, tcl_version, get_tk_patchlevel,
+                                  simulate_mouse_click)
 from tkinter.test.widget_tests import (add_standard_options, noconv,
     AbstractWidgetTest, StandardOptionsTests, IntegerSizeTests, PixelSizeTests,
     setUpModule)
@@ -53,19 +53,15 @@ def test_style(self):
         pass
 
 
-class WidgetTest(unittest.TestCase):
+class WidgetTest(AbstractTkTest, unittest.TestCase):
     """Tests methods available in every ttk widget."""
 
     def setUp(self):
-        support.root_deiconify()
+        super().setUp()
-        self.widget = ttk.Button(width=0, text="Text")
+        self.widget = ttk.Button(self.root, width=0, text="Text")
         self.widget.pack()
         self.widget.wait_visibility()
 
-    def tearDown(self):
-        self.widget.destroy()
-        support.root_withdraw()
-
 
     def test_identify(self):
         self.widget.update_idletasks()
@@ -128,7 +124,7 @@ class FrameTest(AbstractToplevelTest, unittest.TestCase):
         'width',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return ttk.Frame(self.root, **kwargs)
 
 
@@ -141,7 +137,7 @@ class LabelFrameTest(AbstractToplevelTest, unittest.TestCase):
         'text', 'underline', 'width',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return ttk.LabelFrame(self.root, **kwargs)
 
     def test_labelanchor(self):
@@ -161,8 +157,8 @@ def test_labelwidget(self):
 class AbstractLabelTest(AbstractWidgetTest):
 
     def checkImageParam(self, widget, name):
-        image = tkinter.PhotoImage('image1')
+        image = tkinter.PhotoImage(master=self.root, name='image1')
-        image2 = tkinter.PhotoImage('image2')
+        image2 = tkinter.PhotoImage(master=self.root, name='image2')
         self.checkParam(widget, name, image, expected=('image1',))
         self.checkParam(widget, name, 'image1', expected=('image1',))
         self.checkParam(widget, name, (image,), expected=('image1',))
@@ -199,7 +195,7 @@ class LabelTest(AbstractLabelTest, unittest.TestCase):
     )
     _conv_pixels = noconv
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return ttk.Label(self.root, **kwargs)
 
     def test_font(self):
@@ -216,7 +212,7 @@ class ButtonTest(AbstractLabelTest, unittest.TestCase):
         'underline', 'width',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return ttk.Button(self.root, **kwargs)
 
     def test_default(self):
@@ -225,7 +221,7 @@ def test_default(self):
 
     def test_invoke(self):
         success = []
-        btn = ttk.Button(command=lambda: success.append(1))
+        btn = ttk.Button(self.root, command=lambda: success.append(1))
         btn.invoke()
         self.assertTrue(success)
 
@@ -241,7 +237,7 @@ class CheckbuttonTest(AbstractLabelTest, unittest.TestCase):
         'underline', 'variable', 'width',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return ttk.Checkbutton(self.root, **kwargs)
 
     def test_offvalue(self):
@@ -258,7 +254,7 @@ def cb_test():
             success.append(1)
             return "cb test called"
 
-        cbtn = ttk.Checkbutton(command=cb_test)
+        cbtn = ttk.Checkbutton(self.root, command=cb_test)
         # the variable automatically created by ttk.Checkbutton is actually
         # undefined till we invoke the Checkbutton
         self.assertEqual(cbtn.state(), ('alternate', ))
@@ -289,15 +285,9 @@ class ComboboxTest(AbstractWidgetTest, unittest.TestCase):
 
     def setUp(self):
         super().setUp()
-        support.root_deiconify()
         self.combo = self.create()
 
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.combo.destroy()
-        support.root_withdraw()
-        super().tearDown()
-
-    def _create(self, **kwargs):
         return ttk.Combobox(self.root, **kwargs)
 
     def test_height(self):
@@ -405,7 +395,7 @@ def check_get_current(getval, currval):
         self.assertRaises(tkinter.TclError, self.combo.current, '')
 
         # testing creating combobox with empty string in values
-        combo2 = ttk.Combobox(values=[1, 2, ''])
+        combo2 = ttk.Combobox(self.root, values=[1, 2, ''])
         self.assertEqual(combo2['values'],
                          ('1', '2', '') if self.wantobjects else '1 2 {}')
         combo2.destroy()
@@ -423,15 +413,9 @@ class EntryTest(AbstractWidgetTest, unittest.TestCase):
 
     def setUp(self):
         super().setUp()
-        support.root_deiconify()
         self.entry = self.create()
 
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.entry.destroy()
-        support.root_withdraw()
-        super().tearDown()
-
-    def _create(self, **kwargs):
         return ttk.Entry(self.root, **kwargs)
 
     def test_invalidcommand(self):
@@ -558,15 +542,9 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
 
     def setUp(self):
         super().setUp()
-        support.root_deiconify()
         self.paned = self.create()
 
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.paned.destroy()
-        support.root_withdraw()
-        super().tearDown()
-
-    def _create(self, **kwargs):
         return ttk.PanedWindow(self.root, **kwargs)
 
     def test_orient(self):
@@ -588,13 +566,13 @@ def test_add(self):
         label.destroy()
         child.destroy()
         # another attempt
-        label = ttk.Label()
+        label = ttk.Label(self.root)
         child = ttk.Label(label)
         self.assertRaises(tkinter.TclError, self.paned.add, child)
         child.destroy()
         label.destroy()
 
-        good_child = ttk.Label()
+        good_child = ttk.Label(self.root)
         self.paned.add(good_child)
         # re-adding a child is not accepted
         self.assertRaises(tkinter.TclError, self.paned.add, good_child)
@@ -612,7 +590,7 @@ def test_forget(self):
         self.assertRaises(tkinter.TclError, self.paned.forget, None)
         self.assertRaises(tkinter.TclError, self.paned.forget, 0)
 
-        self.paned.add(ttk.Label())
+        self.paned.add(ttk.Label(self.root))
         self.paned.forget(0)
         self.assertRaises(tkinter.TclError, self.paned.forget, 0)
 
@@ -622,9 +600,9 @@ def test_insert(self):
         self.assertRaises(tkinter.TclError, self.paned.insert, 0, None)
         self.assertRaises(tkinter.TclError, self.paned.insert, 0, 0)
 
-        child = ttk.Label()
+        child = ttk.Label(self.root)
-        child2 = ttk.Label()
+        child2 = ttk.Label(self.root)
-        child3 = ttk.Label()
+        child3 = ttk.Label(self.root)
 
         self.assertRaises(tkinter.TclError, self.paned.insert, 0, child)
 
@@ -655,7 +633,7 @@ def test_insert(self):
     def test_pane(self):
         self.assertRaises(tkinter.TclError, self.paned.pane, 0)
 
-        child = ttk.Label()
+        child = ttk.Label(self.root)
         self.paned.add(child)
         self.assertIsInstance(self.paned.pane(0), dict)
         self.assertEqual(self.paned.pane(0, weight=None),
@@ -700,7 +678,7 @@ class RadiobuttonTest(AbstractLabelTest, unittest.TestCase):
         'underline', 'value', 'variable', 'width',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return ttk.Radiobutton(self.root, **kwargs)
 
     def test_value(self):
@@ -713,9 +691,11 @@ def cb_test():
             success.append(1)
             return "cb test called"
 
-        myvar = tkinter.IntVar()
+        myvar = tkinter.IntVar(self.root)
-        cbtn = ttk.Radiobutton(command=cb_test, variable=myvar, value=0)
+        cbtn = ttk.Radiobutton(self.root, command=cb_test,
-        cbtn2 = ttk.Radiobutton(command=cb_test, variable=myvar, value=1)
+                               variable=myvar, value=0)
+        cbtn2 = ttk.Radiobutton(self.root, command=cb_test,
+                                variable=myvar, value=1)
 
         if self.wantobjects:
             conv = lambda x: x
@@ -748,7 +728,7 @@ class MenubuttonTest(AbstractLabelTest, unittest.TestCase):
         'underline', 'width',
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return ttk.Menubutton(self.root, **kwargs)
 
     def test_direction(self):
@@ -774,17 +754,11 @@ class ScaleTest(AbstractWidgetTest, unittest.TestCase):
 
     def setUp(self):
         super().setUp()
-        support.root_deiconify()
         self.scale = self.create()
         self.scale.pack()
         self.scale.update()
 
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.scale.destroy()
-        support.root_withdraw()
-        super().tearDown()
-
-    def _create(self, **kwargs):
         return ttk.Scale(self.root, **kwargs)
 
     def test_from(self):
@@ -856,7 +830,7 @@ def test_set(self):
         self.assertEqual(conv(self.scale.get()), min)
 
         # changing directly the variable doesn't impose this limitation tho
-        var = tkinter.DoubleVar()
+        var = tkinter.DoubleVar(self.root)
         self.scale['variable'] = var
         var.set(max + 5)
         self.assertEqual(conv(self.scale.get()), var.get())
@@ -886,7 +860,7 @@ class ProgressbarTest(AbstractWidgetTest, unittest.TestCase):
     _conv_pixels = noconv
     default_orient = 'horizontal'
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return ttk.Progressbar(self.root, **kwargs)
 
     def test_length(self):
@@ -920,7 +894,7 @@ class ScrollbarTest(AbstractWidgetTest, unittest.TestCase):
     )
     default_orient = 'vertical'
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return ttk.Scrollbar(self.root, **kwargs)
 
 
@@ -932,21 +906,13 @@ class NotebookTest(AbstractWidgetTest, unittest.TestCase):
 
     def setUp(self):
         super().setUp()
-        support.root_deiconify()
         self.nb = self.create(padding=0)
-        self.child1 = ttk.Label()
+        self.child1 = ttk.Label(self.root)
-        self.child2 = ttk.Label()
+        self.child2 = ttk.Label(self.root)
         self.nb.add(self.child1, text='a')
         self.nb.add(self.child2, text='b')
 
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.child1.destroy()
-        self.child2.destroy()
-        self.nb.destroy()
-        support.root_withdraw()
-        super().tearDown()
-
-    def _create(self, **kwargs):
         return ttk.Notebook(self.root, **kwargs)
 
     def test_tab_identifiers(self):
@@ -985,7 +951,7 @@ def test_add_and_hidden(self):
         self.assertRaises(tkinter.TclError, self.nb.hide, 'hi')
         self.assertRaises(tkinter.TclError, self.nb.hide, None)
         self.assertRaises(tkinter.TclError, self.nb.add, None)
-        self.assertRaises(tkinter.TclError, self.nb.add, ttk.Label(),
+        self.assertRaises(tkinter.TclError, self.nb.add, ttk.Label(self.root),
             unknown='option')
 
         tabs = self.nb.tabs()
@@ -993,7 +959,7 @@ def test_add_and_hidden(self):
         self.nb.add(self.child1)
         self.assertEqual(self.nb.tabs(), tabs)
 
-        child = ttk.Label()
+        child = ttk.Label(self.root)
         self.nb.add(child, text='c')
         tabs = self.nb.tabs()
 
@@ -1051,7 +1017,7 @@ def test_insert(self):
         self.assertRaises(tkinter.TclError, self.nb.insert, -1, tabs[0])
 
         # new tab
-        child3 = ttk.Label()
+        child3 = ttk.Label(self.root)
         self.nb.insert(1, child3)
         self.assertEqual(self.nb.tabs(), (tabs[0], str(child3), tabs[1]))
         self.nb.forget(child3)
@@ -1117,7 +1083,7 @@ def test_traversal(self):
 
         self.nb.select(0)
 
-        support.simulate_mouse_click(self.nb, 5, 5)
+        simulate_mouse_click(self.nb, 5, 5)
         self.nb.focus_force()
         self.nb.event_generate('<Control-Tab>')
         self.assertEqual(self.nb.select(), str(self.child2))
@@ -1131,7 +1097,7 @@ def test_traversal(self):
         self.nb.tab(self.child1, text='a', underline=0)
         self.nb.enable_traversal()
         self.nb.focus_force()
-        support.simulate_mouse_click(self.nb, 5, 5)
+        simulate_mouse_click(self.nb, 5, 5)
         if sys.platform == 'darwin':
             self.nb.event_generate('<Option-a>')
         else:
@@ -1149,15 +1115,9 @@ class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
 
     def setUp(self):
         super().setUp()
-        support.root_deiconify()
         self.tv = self.create(padding=0)
 
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.tv.destroy()
-        support.root_withdraw()
-        super().tearDown()
-
-    def _create(self, **kwargs):
         return ttk.Treeview(self.root, **kwargs)
 
     def test_columns(self):
@@ -1393,7 +1353,7 @@ def test_heading(self):
 
     def test_heading_callback(self):
         def simulate_heading_click(x, y):
-            support.simulate_mouse_click(self.tv, x, y)
+            simulate_mouse_click(self.tv, x, y)
             self.tv.update()
 
         success = [] # no success for now
@@ -1582,7 +1542,7 @@ def test_tag_bind(self):
 
         self.assertEqual(len(pos_y), 2) # item1 and item2 y pos
         for y in pos_y:
-            support.simulate_mouse_click(self.tv, 0, y)
+            simulate_mouse_click(self.tv, 0, y)
 
         # by now there should be 4 things in the events list, since each
         # item had a bind for two events that were simulated above
@@ -1612,7 +1572,7 @@ class SeparatorTest(AbstractWidgetTest, unittest.TestCase):
     )
     default_orient = 'horizontal'
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return ttk.Separator(self.root, **kwargs)
 
 
@@ -1623,7 +1583,7 @@ class SizegripTest(AbstractWidgetTest, unittest.TestCase):
         # 'state'?
     )
 
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
         return ttk.Sizegrip(self.root, **kwargs)
 
 tests_gui = (

Lib/tkinter/test/widget_tests.py

@@ -3,9 +3,9 @@
 import unittest
 import sys
 import tkinter
-from tkinter.ttk import setup_master, Scale
+from tkinter.ttk import Scale
-from tkinter.test.support import (tcl_version, requires_tcl, get_tk_patchlevel,
+from tkinter.test.support import (AbstractTkTest, tcl_version, requires_tcl,
-                                  pixels_conv, tcl_obj_eq)
+                                  get_tk_patchlevel, pixels_conv, tcl_obj_eq)
 import test.support
 
 
@@ -22,33 +22,26 @@
 
 _sentinel = object()
 
-class AbstractWidgetTest:
+class AbstractWidgetTest(AbstractTkTest):
     _conv_pixels = staticmethod(pixels_round)
     _conv_pad_pixels = None
-    wantobjects = True
+    _stringify = False
 
-    def setUp(self):
+    @property
-        self.root = setup_master()
+    def scaling(self):
-        self.scaling = float(self.root.call('tk', 'scaling'))
+        try:
-        if not self.root.wantobjects():
+            return self._scaling
-            self.wantobjects = False
+        except AttributeError:
-
+            self._scaling = float(self.root.call('tk', 'scaling'))
-    def tearDown(self):
+            return self._scaling
-        for w in self.root.winfo_children():
-            w.destroy()
 
     def _str(self, value):
-        if self.wantobjects and tcl_version >= (8, 6):
+        if not self._stringify and self.wantobjects and tcl_version >= (8, 6):
             return value
         if isinstance(value, tuple):
             return ' '.join(map(self._str, value))
         return str(value)
 
-    def create(self, **kwargs):
-        widget = self._create(**kwargs)
-        self.addCleanup(widget.destroy)
-        return widget
-
     def assertEqual2(self, actual, expected, msg=None, eq=object.__eq__):
         if eq(actual, expected):
             return
@@ -61,7 +54,7 @@ def checkParam(self, widget, name, value, *, expected=_sentinel,
             expected = value
         if conv:
             expected = conv(expected)
-        if not self.wantobjects:
+        if self._stringify or not self.wantobjects:
             if isinstance(expected, tuple):
                 expected = tkinter._join(expected)
             else:
@@ -193,7 +186,7 @@ def checkReliefParam(self, widget, name):
                 errmsg=errmsg)
 
     def checkImageParam(self, widget, name):
-        image = tkinter.PhotoImage('image1')
+        image = tkinter.PhotoImage(master=self.root, name='image1')
         self.checkParam(widget, name, image, conv=str)
         self.checkInvalidParam(widget, name, 'spam',
                 errmsg='image "spam" doesn\'t exist')
@@ -414,7 +407,7 @@ def test_text(self):
 
     def test_textvariable(self):
         widget = self.create()
-        var = tkinter.StringVar()
+        var = tkinter.StringVar(self.root)
         self.checkVariableParam(widget, 'textvariable', var)
 
     def test_troughcolor(self):
@@ -475,7 +468,7 @@ def test_tristatevalue(self):
 
     def test_variable(self):
         widget = self.create()
-        var = tkinter.DoubleVar()
+        var = tkinter.DoubleVar(self.root)
         self.checkVariableParam(widget, 'variable', var)
 
 

Misc/NEWS

@@ -27,7 +27,9 @@ Core and Builtins
 Library
 -------
 
--- Issue #22191: Fix warnings.__all__.
+- Issue #22236: Fixed Tkinter images copying operations in NoDefaultRoot mode.
+
+- Issue #22191: Fix warnings.__all__.
 
 - Issue #15696: Add a __sizeof__ implementation for mmap objects on Windows.
 
@@ -279,6 +281,9 @@ IDLE
 Tests
 -----
 
+- Issue #22236: Tkinter tests now don't reuse default root window.  New root
+  window is created for every test class.
+
 - Issue #20746: Fix test_pdb to run in refleak mode (-R).  Patch by Xavier
   de Gaye.