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Bug 1487018 [wpt PR 12732] - Add test for "Allow delaying autoplay until video elements become visible, a=testonly 

Automatic update from web-platform-tests
Add test for "Allow delaying autoplay until video elements become visible (#12732)

--

wpt-commits: 0570493aa6334949ba3c67b86247ece5bbafbe56
wpt-pr: 12732
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kaixinjxq 2018-11-30 18:01:58 +00:00 коммит произвёл moz-wptsync-bot
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Коммит 3698d6bbef
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35
testing/web-platform/tests/html/semantics/embedded-content/media-elements/ready-states/autoplay-hidden.optional.html Normal file
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<!doctype html>
<title>autoplay hidden</title>
<link rel="author" title="Intel" href="http://www.intel.com">
<link rel="help" href="https://html.spec.whatwg.org/multipage/media.html#ready-states"/>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/media.js"></script>
<div id="log"></div>
<script>
promise_test(async t => {
let video = document.createElement("video");
video.src = getVideoURI("/media/movie_5");
video.autoplay = true;
// In Safari and Chrome, the video needs to be muted in order to be paused when
// hidden. They decided to do this in order to save resources when a video
// goes out of view and isn't expected to make any sound.
video.muted = true;
video.loop = true;
let watcher = new EventWatcher(t, video, ["playing", "pause"]);
document.body.appendChild(video);
await watcher.wait_for("playing");
assert_false(video.paused, "paused when video is display");
video.hidden = true;
await watcher.wait_for("pause");
assert_true(video.paused, "paused when video is hidden");
video.hidden = false;
await watcher.wait_for("playing");
assert_false(video.paused, "paused when video is display");
}, "Allow delaying autoplay until video elements become visible");
</script>