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Re: replacing __dict__ with an OrderedDict

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From Lie Ryan <lie.1296@gmail.com>
Subject Re: replacing __dict__ with an OrderedDict
Date Sat, 07 Jan 2012 04:42:53 +1100
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On 01/07/2012 04:20 AM, Ian Kelly wrote:
> On Fri, Jan 6, 2012 at 10:01 AM, Lie Ryan<lie.1296@gmail.com>  wrote:
>> That unittest executes its tests in alphabetical order is implementation
>> detail for a very good reason, and good unittest practice dictates that
>> execution order should never be defined (some even argued that the execution
>> order should be randomized). If the test runner turns out to execute tests
>> concurrently, that should not cause problems for a well-designed test.
>> Displaying the test results in a more convenient order for viewing is what
>> you really wanted in 99.99% of the cases.
>
> Randomizing the order is not a bad idea, but you also need to be able
> to run the tests in a consistent order, from a specific random seed.
> In the real world, test conflicts and dependencies do happen, and if
> we observe a failure, make a change, rerun the tests and observe
> success, we need to be able to be sure that we actually fixed the bug,
> and that it didn't pass only because it was run in a different order.
>
> Concurrent testing is a bad idea for this reason -- it's not
> repeatable (testing concurrency, OTOH, is a perfectly fine thing to be
> thinking about).

Concurrent testing is perfectly fine strategy in the case where you have 
thousands of tests and running them synchronously will just take too 
long. Certainly it makes it harder to repeat the test if there is any 
sort of dependency in the tests, but when you have the large number of 
tests, the benefit may exceeds the drawbacks.

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Thread

replacing __dict__ with an OrderedDict Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-01-06 10:48 +0100
  Re: replacing __dict__ with an OrderedDict Lie Ryan <lie.1296@gmail.com> - 2012-01-06 22:43 +1100
    Re: replacing __dict__ with an OrderedDict Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-01-06 14:36 +0100
      Re: replacing __dict__ with an OrderedDict Lie Ryan <lie.1296@gmail.com> - 2012-01-07 04:01 +1100
        Re: replacing __dict__ with an OrderedDict Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-01-07 00:45 +0000
      Re: replacing __dict__ with an OrderedDict Ian Kelly <ian.g.kelly@gmail.com> - 2012-01-06 10:20 -0700
        Re: replacing __dict__ with an OrderedDict Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-01-07 00:49 +0000
          Re: replacing __dict__ with an OrderedDict Lie Ryan <lie.1296@gmail.com> - 2012-01-07 12:21 +1100
          Re: replacing __dict__ with an OrderedDict Ian Kelly <ian.g.kelly@gmail.com> - 2012-01-06 18:24 -0700
            Re: replacing __dict__ with an OrderedDict Eelco <hoogendoorn.eelco@gmail.com> - 2012-01-08 14:03 -0800
              Re: replacing __dict__ with an OrderedDict Lie Ryan <lie.1296@gmail.com> - 2012-01-09 23:10 +1100
                Re: replacing __dict__ with an OrderedDict Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-01-09 14:16 +0100
                Re: replacing __dict__ with an OrderedDict Lie Ryan <lie.1296@gmail.com> - 2012-01-10 23:31 +1100
                Re: replacing __dict__ with an OrderedDict Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-01-10 18:21 +0100
        Re: replacing __dict__ with an OrderedDict Roy Smith <roy@panix.com> - 2012-01-09 09:35 -0500
          Re: replacing __dict__ with an OrderedDict Neil Cerutti <neilc@norwich.edu> - 2012-01-09 14:52 +0000
          Re: replacing __dict__ with an OrderedDict Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-01-09 17:59 +0100
            Re: replacing __dict__ with an OrderedDict Ian Kelly <ian.g.kelly@gmail.com> - 2012-01-09 10:30 -0700
            Re: replacing __dict__ with an OrderedDict Roy Smith <roy@panix.com> - 2012-01-09 20:05 -0500
              Re: replacing __dict__ with an OrderedDict Terry Reedy <tjreedy@udel.edu> - 2012-01-09 23:21 -0500
              Re: replacing __dict__ with an OrderedDict Lie Ryan <lie.1296@gmail.com> - 2012-01-10 23:22 +1100
                Re: replacing __dict__ with an OrderedDict Roy Smith <roy@panix.com> - 2012-01-10 09:05 -0500
                Re: replacing __dict__ with an OrderedDict Lie Ryan <lie.1296@gmail.com> - 2012-01-11 02:57 +1100
                Re: replacing __dict__ with an OrderedDict Roy Smith <roy@panix.com> - 2012-01-10 21:47 -0500
                Re: replacing __dict__ with an OrderedDict Tim Wintle <tim.wintle@teamrubber.com> - 2012-01-10 15:45 +0000
            Re: replacing __dict__ with an OrderedDict Lie Ryan <lie.1296@gmail.com> - 2012-01-10 23:46 +1100
      Re: replacing __dict__ with an OrderedDict Lie Ryan <lie.1296@gmail.com> - 2012-01-07 04:42 +1100
  Re: replacing __dict__ with an OrderedDict Peter Otten <__peter__@web.de> - 2012-01-06 12:44 +0100
    Re: replacing __dict__ with an OrderedDict Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-01-06 14:40 +0100
      Re: replacing __dict__ with an OrderedDict Ian Kelly <ian.g.kelly@gmail.com> - 2012-01-06 09:06 -0700
        Re: replacing __dict__ with an OrderedDict alex23 <wuwei23@gmail.com> - 2012-01-08 20:58 -0800
      Re: replacing __dict__ with an OrderedDict Ian Kelly <ian.g.kelly@gmail.com> - 2012-01-06 09:07 -0700
      Re: replacing __dict__ with an OrderedDict Arnaud Delobelle <arnodel@gmail.com> - 2012-01-06 21:38 +0000
    Re: replacing __dict__ with an OrderedDict Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2012-01-18 11:29 +0100
  Re: replacing __dict__ with an OrderedDict Ethan Furman <ethan@stoneleaf.us> - 2012-01-06 06:13 -0800
  Re: replacing __dict__ with an OrderedDict Arnaud Delobelle <arnodel@gmail.com> - 2012-01-06 21:32 +0000

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