GNU bug report logs - #27039
(tests guix-download) fails when DNS is bogus

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Leo Famulari <leo <at> famulari.name>
To: bug-guix <at> gnu.org
Subject: (tests guix-download) fails when DNS is bogus
Date: Tue, 23 May 2017 12:24:31 -0400

[Message part 1 (text/plain, inline)]

The guix-download test includes this snippet:

------
# Make sure it fails here.
if guix download http://does.not/exist
then false; else true; fi
------

Unfortunately, many ISPs (such as T-Mobile) return bogus results for
otherwise unclaimed domain names, causing this test to fail.

Does anyone know if there is some domain that is designed to fail as a
"standard", as <http://example.com> is intended to be used for examples
of good domains?

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Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: bug-guix <at> gnu.org,Leo Famulari <leo <at> famulari.name>,27039 <at> debbugs.gnu.org
Subject: Re: bug#27039: (tests guix-download) fails when DNS is bogus
Date: Tue, 23 May 2017 16:47:02 +0000

On May 23, 2017 9:24:31 AM PDT, Leo Famulari <leo <at> famulari.name> wrote:
>The guix-download test includes this snippet:
>
>------
># Make sure it fails here.
>if guix download http://does.not/exist
>then false; else true; fi
>------
>
>Unfortunately, many ISPs (such as T-Mobile) return bogus results for
>otherwise unclaimed domain names, causing this test to fail.
>
>Does anyone know if there is some domain that is designed to fail as a
>"standard", as <http://example.com> is intended to be used for examples
>of good domains?

Could we simply mock the expected response?

Maxim

Message #14 received at 27039 <at> debbugs.gnu.org (full text, mbox):

From: <ng0 <at> pragmatique.xyz>
To: "27039" <27039 <at> debbugs.gnu.org>
Subject: Re: bug#27039: (tests guix-download) fails when DNS is bogus
Date: Tue, 23 May 2017 19:07:23 +0200 (CEST)

On Tue, 23 May 2017 12:24:31 -0400, Leo Famulari <leo <at> famulari.name> wrote:

> The guix-download test includes this snippet:
> 
> ------
> # Make sure it fails here.
> if guix download http://does.not/exist
> then false; else true; fi
> ------
> 
> Unfortunately, many ISPs (such as T-Mobile) return bogus results for
> otherwise unclaimed domain names, causing this test to fail.
> 
> Does anyone know if there is some domain that is designed to fail as a
> "standard", as <http://example.com> is intended to be used for examples
> of good domains?

http://fail.0

fails to resolve with "ping: bad address 'fail.0'. This was run on an OpenNIC connected computer.

Message #17 received at 27039 <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: Leo Famulari <leo <at> famulari.name>
Cc: 27039 <at> debbugs.gnu.org
Subject: Re: bug#27039: (tests guix-download) fails when DNS is bogus
Date: Tue, 23 May 2017 23:03:13 +0200

Leo Famulari <leo <at> famulari.name> skribis:

> The guix-download test includes this snippet:
>
> ------
> # Make sure it fails here.
> if guix download http://does.not/exist
> then false; else true; fi
> ------
>
> Unfortunately, many ISPs (such as T-Mobile) return bogus results for
> otherwise unclaimed domain names, causing this test to fail.

Yes, this has been reported several times in the past and marked as
“wontfix”.  :-)

> Does anyone know if there is some domain that is designed to fail as a
> "standard", as <http://example.com> is intended to be used for examples
> of good domains?

There’s an RFC defining example.org et al.  These domain names are
guaranteed to exist, so we’d be testing something different; also, I
don’t know if the RFC defines pages guaranteed to be 404, for instance.

Ludo’.

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