From: ext Benjamin Poulain <benja...@webkit.org<mailto:benja...@webkit.org>> Date: Saturday, February 9, 2013 12:52 AM To: Noam Rosenthal <noam.rosent...@nokia.com<mailto:noam.rosent...@nokia.com>> Cc: "rn...@webkit.org<mailto:rn...@webkit.org>" <rn...@webkit.org<mailto:rn...@webkit.org>>, "webkit-dev@lists.webkit.org<mailto:webkit-dev@lists.webkit.org>" <webkit-dev@lists.webkit.org<mailto:webkit-dev@lists.webkit.org>> Subject: Re: [webkit-dev] Testing feature suggestion: animation/interaction pixel-results "on the fly"
On Fri, Feb 8, 2013 at 3:16 PM, <noam.rosent...@nokia.com<mailto:noam.rosent...@nokia.com>> wrote: The problem with dynamic features of the web like animations/interactions is that they're non-deterministic, or at least a lot less deterministic than static features of the web like layouts. Ref tests, pixel tests etc. are tools built for deterministic testing: load a file, take a snapshot, compare against a result. Testing an animation (or a filter) needs to feel a lot more dynamic and expressive: Animate green boxes, make sure that they're within a particular range at particular points in time". The tests also have to be deterministic and comprehensive. I am afraid of loosing both with the Render-to-Canvas approach. Can you give concrete examples of the kind of bugs you are hunting, and why testing cannot use the two methods suggested? I did not say they cannot be tested with the two methods suggested :) It's more about a preference to move some of those decisions from the test infrastructure to the test itself, but potentially those bugs could be tested in either way. Examples for bugs I've encountered/reviewed and can use better in-motion testing (note that those are specific to Qt/EFL, but I'm sure there are tons of bugs like this that come up for Apple/Google as well) http://trac.webkit.org/changeset/140825 http://trac.webkit.org/changeset/142112 http://trac.webkit.org/changeset/134953 https://bugs.webkit.org/show_bug.cgi?id=109179 Controlling the clock and programmatically sampling the end result would definitely make those more testable, but of course any progress in this area would be beneficial and my preference to a canvas-based API is more of an opinion.
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