Hello webkit-dev! (ecosystem-infra in Bcc) TPAC was last week, and there was much talk about web-platform-tests. Some notes are at https://lists.w3.org/Archives/Public/public-test-infra/2017OctDec/thread.html and in particular https://www.w3.org/2017/11/07-testing-minutes.html.
In Blink, we're thinking seriously about what it'd take to upstream large parts of LayoutTests into web-platform-tests, and we've realized that there are some risks here, beyond just making sure the tests are good and per spec. Specifically, one bad outcome would be if Blink successfully upstreamed thousands of tests that are also in WebKit, which then begin to diverge in small and large ways. That'd leave WebKit with more duplication between its own tests and web-platform-tests than any other engine, and a headache that grows over time. So, I think this would require close cooperation with the WebKit project. Some different ways this might happen: 1. A Blink developer and WebKit developer work together at the same time to move their common tests in some area into web-platform-tests, each removing identical tests that were upstreamed by the other and consolidating what remains. 2. A Blink developer works to first upstream tests from WebKit (using WebKit's coming export mechanism), waits for it to be imported into Blink, and then removes the tests from Blink. 3. The reverse situation. Are there already some areas where the first approach might be doable, where the Blink and WebKit folks already know each other and are eager to do this? Is LayoutTests/css3/flexbox/ by any chance such a case? I realize it's hard to judge these approaches in the abstract, but am curious to hear any enthusiasm or concerns about it. Thanks!
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