On Wed, Aug 8, 2012 at 10:47 AM, Ojan Vafai <[email protected]> wrote: > See https://bugs.webkit.org/show_bug.cgi?id=93195. > > media/W3C/video/networkState/networkState_during_progress.html and > media/video-poster-blocked-by-willsendrequest.html are flaky on all > platforms because they behave differently if the loaded resource is cached. > > Every time I've taken a stab at reducing test flakiness, I've come across at > least a few tests that pass when run as part of the test suite, but fail > when run by themselves (or in parallel) because they accidentally expect an > image or something to be in the cache. > > I think it would make the tests more maintainable if we cleared the cache > before each test run. This is *not* before each page load though. So tests > that do multiple page loads will still test cross-navigation caching > behavior. > > While it's true that we could one-off fix each of these tests, it's usually > very time consuming to figure out that caching is the problem, that's > assuming anyone takes the time to look into why the test is flaky in the > first place. > > Any objections? >
Given that the way we run tests in parallel in NRWT means that different processes get different lists of tests each time, it sounds like we may be getting a fair amount of nondeterminism from the cache not being cleared between tests. That seems bad, so I'm in favor of clearing the cache :) -- Dirk _______________________________________________ webkit-dev mailing list [email protected] http://lists.webkit.org/mailman/listinfo/webkit-dev
