From mboxrd@z Thu Jan  1 00:00:00 1970
From: Vincent Legoll <vincent.legoll@gmail.com>
Subject: Re: Need help fixing testcases with time-difference
Date: Thu, 18 Aug 2016 10:59:20 +0200
Message-ID: <CAEwRq=pO1PbxS_w4_yj2AjTS78b09B2BroMce-VR28Z6xJYHSw@mail.gmail.com>
References: <57B56C3D.4050705@crazy-compilers.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Return-path: <guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:58621)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <vincent.legoll@gmail.com>) id 1baJAY-00062S-QW
	for guix-devel@gnu.org; Thu, 18 Aug 2016 04:59:23 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <vincent.legoll@gmail.com>) id 1baJAX-0002Mv-NW
	for guix-devel@gnu.org; Thu, 18 Aug 2016 04:59:22 -0400
Received: from mail-qk0-x230.google.com ([2607:f8b0:400d:c09::230]:35467)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <vincent.legoll@gmail.com>) id 1baJAX-0002Mp-Iq
	for guix-devel@gnu.org; Thu, 18 Aug 2016 04:59:21 -0400
Received: by mail-qk0-x230.google.com with SMTP id v123so10233657qkh.2
	for <guix-devel@gnu.org>; Thu, 18 Aug 2016 01:59:21 -0700 (PDT)
In-Reply-To: <57B56C3D.4050705@crazy-compilers.com>
List-Id: "Development of GNU Guix and the GNU System distribution."
	<guix-devel.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/guix-devel>,
	<mailto:guix-devel-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/guix-devel/>
List-Post: <mailto:guix-devel@gnu.org>
List-Help: <mailto:guix-devel-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/guix-devel>,
	<mailto:guix-devel-request@gnu.org?subject=subscribe>
Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org
Sender: "Guix-devel" <guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org>
To: Hartmut Goebel <h.goebel@crazy-compilers.com>
Cc: guix-devel <guix-devel@gnu.org>

Hello,

On Thu, Aug 18, 2016 at 10:05 AM, Hartmut Goebel
<h.goebel@crazy-compilers.com> wrote:
> Hi,
>
> I'm currently working on django, the web application framework.
> Unfortunalty some tests fail. These are all testing time- and timezone
> calculations.
>
> Failures are like this:
>
> AssertionError: datetime.timedelta(0, 3600, 16) not less than
> datetime.timedelta(0, 2)
>
> which means the returned time difference is ca. 1 hour, but allowed are
> only 2 minutes. The testcase os this one
> https://github.com/django/django/blob/master/tests/file_storage/tests.py#L239>
>
> I already added tzdata to native-inputs, but this does not solve the issue.
>
> Any hints?

That looks like a Daylight Saving Time mismatch, could that be possible ?

DST is 1h delta, which would be datetime.timedelta(0, 3600), thus if we remove
that, the test assertion becomes true...

>>> assert datetime.timedelta(0, 3600, 16) < datetime.timedelta(0, 2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AssertionError
>>> assert (datetime.timedelta(0, 3600, 16) - datetime.timedelta(0, 3600)) < datetime.timedelta(0, 2)

WDYT?

-- 
Vincent Legoll