[3.13] gh-153716: Harden ttk/tkinter GUI tests against display scaling (GH-153717)#153743
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serhiy-storchaka merged 1 commit intoJul 15, 2026
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…pythonGH-153717) Compute probe coordinates from each widget's own realized geometry instead of hardcoding pixels such as (5, 5) or width - 5, which land on a different element, or miss it entirely, at a high display scaling. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> (cherry picked from commit 87411d0)
This was referenced Jul 15, 2026
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Manual backport of #153717 (gh-153716) to 3.13.
Conflicts in
Lib/test/test_ttk/test_widgets.py, in the Combobox/Spinbox arrow-click helpers: 3.13 hadassertRegex(identify(...), r'...arrow\Z'), which the PR replaced with the regex-free_arrow_xscan. Resolved by taking the PR's version (which also sidesteps\z, unsupported on 3.13).test_tkinter/test_widgets.pymerged cleanly.Verified: the affected
test_ttktests andtest_tkinterScaleTest.test_identifypass on Tk 8.6 at DPI 96 and 288.