[bug#55420] [PATCH v2 1/2] guix: emacs-utils: Add emacs-batch-script.

[Fredrik Salomonsson <plattfot@posteo.net>]

Hi Maxime,

Maxime Devos <maximedevos@telenet.be> writes:

> Fredrik Salomonsson schreef op zo 05-06-2022 om 00:19 [+0000]:
>> +(test-equal "print foo from emacs"
>> +  "foo"
>> +  (emacs-batch-script '(princ "foo")))
>
> IIUC, this can only be run if emacs is in $PATH when running the tests,
> so sometimes the test needs to be skipped.  As an example on how to do
> this, see the "pypi->guix-package, wheels" test in tests/pypi.scm.

Yes, you are correct. All my tests started to fail when I added `--pure`
to my test command.

I just sent in a v3 of the patches when I skip the tests if emacs is not
in the PATH.

I also changed the tests for the `emacs-header-parse` to be wrapped by
`call-with-temporary-directory`. It felt wasteful to create and destroy that
file for each test when the file is static.

I opted to just have one test-skip and skip all five of them. Although
that migth be too fragile. Would be great to have something like:

    (unless (which "emacs")
      (test-skip "emacs-batch-script:")
      (test-skip "emacs-header-parse:"))

But the docs just mention a counter or the full name of a test.

-- 
s/Fred[re]+i[ck]+/Fredrik/g