Tkinter tests fail with Tk 8.7, 9.0 and 9.1

[serhiy-storchaka]

I build Python with the latest versions of Tk 8.7, 9.0 and 9.1. Multiple Tkinter tests fail (mostly the configure tests). Last time the tests were updated for pre-release version of Tk 8.7, this can be reason. Also, some fine details can be changed in bugfix releases.

Looking at the code, the past attempts to fix tests for 8.7 and 9.0 make some cases to be just omitted for new Tk versions, or replaced by tests for already covered cases. I tried to fix this too, and simplify the tests code.

Linked PRs

• gh-145736: Fix Tkinter tests for Tk 8.7, 9.0 and 9.1 #145738
• [3.14] gh-145736: Fix Tkinter tests for Tk 8.7, 9.0 and 9.1 (GH-145738) #145841

[ned-deily]

For the record, Tcl/Tk 8.7 was never officially released, with development abandoned after 8.7a5 (June 18, 2021). So we shouldn't worry about whether tests fail for it.

[serhiy-storchaka]

Ah, that's why the tests mostly used 9.0 as the threshold. Anyway, after making the tests passing on all four versions, keeping support for 8.7 is not a large burden.