Thanks. I managed to work it out. I think the problem was twofold:
- I needed to call self.mywidget.focus_force(), because my test root
wasn't getting focus
- I needed to call self.root.update() before *and* after the key events
This got it working.
Thanks for your feedback!
On 02/01/2018 04:35 PM, Bryan Oakley wrote:
You might need to also generate a <FocusIn> event and/or move the
mouse over the widget with the warp option (widget.event_generate(...,
warp=True), but you may need to also specify an x and y coordinate. I
don't remember). I think some widgets check to see if they have focus,
and will ignore keyboard events if they aren't focused. At least, I
vaguely recall having done that a decade or two ago when I tried
writing a tcl/tk testing harness.
On Wed, Jan 31, 2018 at 12:09 PM, alan moore <m...@alandmoore.com
<mailto:m...@alandmoore.com>> wrote:
Hi all,
I'm attempting to write a unit test for a custom widget using
Python unittest. I'm trying to simulate actual keystrokes in my
unit test.
Following the example from the tkinter test suite, I created a
test that is approximately this:
from tkinter import Entry as MyWidget
from tkinter.test.support import AbstractTkTest
import unittest
class TestMyWidget(AbstractTkTest, unittest.TestCase):
def setUp(self):
super().setUp()
self.mywidget = self.create()
self.mywidget.wait_visibility()
def tearDown(self):
super().tearDown()
self.mywidget.destroy()
def create(self):
mw = MyWidget(self.root)
mw.pack()
return mw
def _keystroke(self, char):
self.mywidget.event_generate('<KeyPress-{}>'.format(char))
self.mywidget.event_generate('<KeyRelease-{}>'.format(char))
self.mywidget.update_idletasks()
def test_key_entry(self):
self._keystroke('a')
self.assertEqual(self.mywidget.get(), 'a')
if __name__ == '__main__':
unittest.main()
This doesn't work, though. The keypresses don't register and
create any text in the entry. I can add text using event_generate
inside a mainloop, but without mainloop it doesn't seem to work.
Interestingly, I can use the same method to generate mouse events
and they seem to be recognized. Is there a way to make keypresses
work without mainloop?
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