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When simple query dialogs (tkinter.simpledialog), message boxes (tkinter.messagebox) or color choose dialog (tkinter.colorchooser) are created without arguments master and parent, and the default root window is not yet created, a new temporary hidden root window will be created automatically. It will not be set as the default root window and will be destroyed right after closing the dialog window. It will help to use these simple dialog windows in programs which do not need other GUI. Previously, message boxes and color chooser created the blank root window and left it after closing the dialog window, and query dialogs just raised an exception. Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
38 lines
1.2 KiB
Python
38 lines
1.2 KiB
Python
import unittest
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import tkinter
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from test.support import requires, run_unittest, swap_attr
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from tkinter.test.support import AbstractDefaultRootTest
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from tkinter.commondialog import Dialog
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from tkinter.messagebox import showinfo
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requires('gui')
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class DefaultRootTest(AbstractDefaultRootTest, unittest.TestCase):
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def test_showinfo(self):
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def test_callback(dialog, master):
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nonlocal ismapped
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master.update()
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ismapped = master.winfo_ismapped()
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raise ZeroDivisionError
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with swap_attr(Dialog, '_test_callback', test_callback):
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ismapped = None
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self.assertRaises(ZeroDivisionError, showinfo, "Spam", "Egg Information")
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self.assertEqual(ismapped, False)
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root = tkinter.Tk()
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ismapped = None
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self.assertRaises(ZeroDivisionError, showinfo, "Spam", "Egg Information")
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self.assertEqual(ismapped, True)
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root.destroy()
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tkinter.NoDefaultRoot()
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self.assertRaises(RuntimeError, showinfo, "Spam", "Egg Information")
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tests_gui = (DefaultRootTest,)
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if __name__ == "__main__":
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run_unittest(*tests_gui)
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