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import unittest
import tkinter
from test.support import requires, swap_attr
from tkinter.test.support import AbstractDefaultRootTest
from tkinter.commondialog import Dialog
from tkinter.messagebox import showinfo
requires('gui')
class DefaultRootTest(AbstractDefaultRootTest, unittest.TestCase):
def test_showinfo(self):
def test_callback(dialog, master):
nonlocal ismapped
master.update()
ismapped = master.winfo_ismapped()
raise ZeroDivisionError
with swap_attr(Dialog, '_test_callback', test_callback):
ismapped = None
self.assertRaises(ZeroDivisionError, showinfo, "Spam", "Egg Information")
self.assertEqual(ismapped, False)
root = tkinter.Tk()
ismapped = None
self.assertRaises(ZeroDivisionError, showinfo, "Spam", "Egg Information")
self.assertEqual(ismapped, True)
root.destroy()
tkinter.NoDefaultRoot()
self.assertRaises(RuntimeError, showinfo, "Spam", "Egg Information")
if __name__ == "__main__":
unittest.main()