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Re: unittest weirdness

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To python-list@python.org
From Terry Reedy <tjreedy@udel.edu>
Subject Re: unittest weirdness
Date Tue, 11 Mar 2014 23:36:44 -0400
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On 3/11/2014 6:13 PM, John Gordon wrote:
> In <mailman.8062.1394573210.18130.python-list@python.org> Ethan Furman <ethan@stoneleaf.us> writes:
>
>>           if missing:
>>               raise ValueError('invoices %r missing from batch' % missing)
>
> It's been a while since I wrote test cases, but I recall using the assert*
> methods (assertEqual, assertTrue, etc.) instead of raising exceptions.
> Perhaps that's the issue?

Yes. I believe the methods all raise AssertionError on failure, and the 
test methods are wrapped with try:.. except AssertionError as err:

    if missing:
      raise ValueError('invoices %r missing from batch' % missing)

should be "assertEqual(missing, [], 'invoices missing from batch')" and 
if that fails, the non-empty list is printed along with the message.

-- 
Terry Jan Reedy

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Thread

unittest weirdness Ethan Furman <ethan@stoneleaf.us> - 2014-03-11 13:58 -0700
  Re: unittest weirdness John Gordon <gordon@panix.com> - 2014-03-11 22:13 +0000
    Re: unittest weirdness Ethan Furman <ethan@stoneleaf.us> - 2014-03-11 15:29 -0700
    Re: unittest weirdness Terry Reedy <tjreedy@udel.edu> - 2014-03-11 23:36 -0400
    Re: unittest weirdness Ethan Furman <ethan@stoneleaf.us> - 2014-03-12 03:03 -0700
      Re: unittest weirdness Roy Smith <roy@panix.com> - 2014-03-12 09:44 -0400
        Re: unittest weirdness Ethan Furman <ethan@stoneleaf.us> - 2014-03-12 08:32 -0700
          Re: unittest weirdness Roy Smith <roy@panix.com> - 2014-03-12 13:48 -0400
          Re: unittest weirdness Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-03-12 23:14 +0000
          Re: unittest weirdness Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-03-12 23:47 +0000
            Re: unittest weirdness Ethan Furman <ethan@stoneleaf.us> - 2014-03-12 17:31 -0700
        Re: unittest weirdness Terry Reedy <tjreedy@udel.edu> - 2014-03-12 22:27 -0400
  Re: unittest weirdness Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-03-12 23:38 +0000
    Re: unittest weirdness Ethan Furman <ethan@stoneleaf.us> - 2014-03-12 17:36 -0700

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