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Subject: [bug#27650] [PATCH] gnu: services: admin: Add tailon.
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From: ludo@gnu.org (Ludovic =?UTF-8?Q?Court=C3=A8s?=)
References: <20170711065634.9717-1-mail@cbaines.net> <87shi1etui.fsf@gnu.org>
	<20170716165149.48c2fe19@cbaines.net>
Date: Mon, 17 Jul 2017 10:40:11 +0200
In-Reply-To: <20170716165149.48c2fe19@cbaines.net> (Christopher Baines's
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To: Christopher Baines <mail@cbaines.net>
Cc: 27650@debbugs.gnu.org

Christopher Baines <mail@cbaines.net> skribis:

> On Wed, 12 Jul 2017 14:13:25 +0200

[...]

>> Bonus points if you write a system test that checks that at least the
>> Web server shows up on port 8080.
>
> I've had a go at this, I'll send a separate patch. It doesn't pass for
> me yet, and I'm not sure how to work out what is going on inside the
> test system, does anyone have any tips for writing and debugging system
> tests in general?

No specific tips.  Beware of QEMU port forwarding: it doesn=E2=80=99t allow=
 you
to really diagnose what=E2=80=99s going on if you can=E2=80=99t connect fro=
m the host to
the guest (it=E2=80=99s hard to tell if that=E2=80=99s because the service =
in the guest
is not running.)  So on a few occasions I found that I=E2=80=99d first try
connecting from within the guest as my first attempt (using
=E2=80=98marionette-eval=E2=80=99), to see if this would work at all.

Sometimes you=E2=80=99ll also want to just run a VM of the system under test
interactively so experiment a bit.

HTH,
Ludo=E2=80=99.