Terry J. Reedy <[email protected]> added the comment:
Real use case for after_info() (with not arg): #33855 is about minimally
testing all IDLE modules. At least import the module and create class
instances when easily possible. For test_editor, I started with
def test_init(self): # Temporary.
e = Editor(root=self.root)
self.assertEqual(e.root, self.root)
and got in Shell
warning: callback failed in WindowList <class '_tkinter.TclError'> : invalid
command name ".!menu.windows"
and in the console
invalid command name "119640952recolorize"
while executing
"119640952recolorize"
("after" script)
invalid command name "119872312timer_event"
while executing
"119872312timer_event"
("after" script)
invalid command name "119872440config_timer_event"
while executing
"119872440config_timer_event"
("after" script)
Perhaps this is why I previously omitted something so obvious (it add 24% to
coverage).
I added e._close(), which tries to cleanup, and the messages, in console only,
are reduced to
bgerror failed to handle background error.
Original error: invalid command name "115211704timer_event"
Error in bgerror: can't invoke "tk" command: application has been destroyed
bgerror failed to handle background error.
Original error: invalid command name "115211832config_timer_event"
Error in bgerror: can't invoke "tk" command: application has been destroyed
I would like to know what _close misses, but it is hard to track them down.
print(self.root.tk.call('after', 'info')) after the close returned ('after#4',
'after#3', 'after#1', 'after#0'). Adding
for id in cls.root.tk.call('after', 'info'):
self.root.after_cancel(id)
before cls.root.destroy() in shutDownClass stops the messages.
--
For test_del in #32831, I think the following might work, and be much shorter
than the current code.
n = len(self.root.tk.call('after', 'info')
self.cc.__del__()
self.assertEqual(len(self.root.tk.call('after', 'info')), n-2)
----------
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<https://bugs.python.org/issue32839>
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