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From Павлухин Иван <vololo...@gmail.com>
Subject Re: [DISCUSSION] Fixed test order to reduce flakyness
Date Tue, 05 Feb 2019 15:56:37 GMT
Dmitriy,

Sounds like a good idea to me. Problems related to tests isolation are
very common in practice. And things can be complicated when order
varies.

But by the way does the order of Ignite tests vary today? Junit 4
javadocs claims something about "default deterministic order" [1].

[1] https://junit.org/junit4/javadoc/latest/org/junit/FixMethodOrder.html

вт, 5 февр. 2019 г. в 17:40, Dmitriy Pavlov <dpavlov@apache.org>:
>
> Dear Ignite Developers,
>
> The original idea came from our recent habr.ru post related to Apache
> Ignite TeamCity Bot (for Russian native speakers, you can read an original
> https://habr.com/ru/company/sberbank/blog/436070/#comment_19616976 )
>
> It is a known phenomenon when tests have an influence on each other. The
> simplest case when Ignite Native persistence is used, and not properly
> cleared after a test run. This can make some test failed afterward.
>
> So, what if we will set predictable, for example, alphabetical tests
> execution order (maven-surefire-plugin/runOrder/alphabetical). This may
> have the following effect: the set of tests failed because of being
> affected by the previous run will be constant, will be exactly the same
> each run.
>
> At some point, when we stabilize flaky tests enough, we may select random
> order, but for now, this solution seems valid to me.
>
> What do you think?
>
> Sincerely,
> Dmitriy Pavlov



-- 
Best regards,
Ivan Pavlukhin

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