bug#65734: [BUG] kill-whole-line on folded subtrees [9.6.8 (release_9.6.8-3-g21171d @ /home/w/usr/emacs/0/29/0/lisp/org/)]

[Eli Zaretskii <eliz@gnu.org>]

> From: Sebastian Miele <iota@whxvd.name>
> Cc: Eli Zaretskii <eliz@gnu.org>, Ihor Radchenko <yantar92@posteo.net>
> Date: Sun, 10 Sep 2023 18:31:20 +0200
> 
> I removed emacs-orgmode@gnu.org from CC.
> 
> > From: Sebastian Miele <iota@whxvd.name>
> > Date: Wed, 2023-09-06 15:30 +0200
> >
> > I will write the tests.  And I will probably come up with an updated
> > version of the original patch.  There is at least one cosmetic change.
> > And something else that I want to have tried.  May take some time.
> 
> Please have a look at the following patch.  For now it contains three
> tests, two of them with :expected-result :failed.  (They do not fail on
> the bug-fixed version of `kill-whole-line'.)

Yes, there should be more tests, ideally: there are situations where
kill-whole-line signals an error, and I don't think I see tests where
some of the text is invisible (as the function uses
forward-visible-line and end-of-visual-line).

> There probably will be more tests and further questions.  But for now, I
> would like to basically have a statement of whether the style of writing
> the tests goes in an acceptable direction.

Looks reasonable, but I'm not sure I understand what will the test
show if one of the tests fails: will the information shown then tell
enough to understand which of the sub-tests failed and why?

Thanks.