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From Luc Maisonobe <Luc.Maison...@free.fr>
Subject Re: Bug in "RandomDataTest" ?
Date Sun, 29 Jan 2012 09:41:22 GMT
Le 29/01/2012 09:41, Sébastien Brisard a écrit :
> Hi Gilles,
>>
>> My worry is that the test fails for many choices of seeds. And I don't know
>> how to figure out whether the unit test is wrong, or the code is wrong, or
>> it is normal that the choice of seed has such an influence on the test (in
>> which case it should be documented that not all seeds are equal...).
>>
>>
>> Thanks,
>> Gilles
>>
> I've had the same concerns while working on MATH-692. I do not have a
> satisfactory answer, though. People seemed happy to just use a seed
> that works, but I'm not sure we are proving anything at all. Maybe
> what should be done is compute a probability of failure of the test by
> sampling the seeds. Of course, the unit tests would become quite

I don't think it will prove anything more. We seem to lack the skills to
understand these failures. Perhaps we could ask ourselves for help on
the users list ? We could ask for someone knowledgeable to check our
code, our tests, and the tests that fail in order to identify the problem.

Luc

> expensive, so we might think of a way to carry them out optionnally.
> Sébastien
> 
> 
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