gecko-dev/dom/media/test/test_play_promise_3.html

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HTML

<!DOCTYPE HTML>
<html>
<head>
<title>Media test: promise-based play() method</title>
<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
<script type="text/javascript" src="manifest.js"></script>
</head>
<body>
<pre id="test">
<script>
// Name: playAfterPlaybackStarted
// Case: invoke play() on an element that is already playing
// Expected result: resolve the promise
let manager = new MediaTestManager;
function initTest(test, token) {
manager.started(token);
let element = document.createElement(getMajorMimeType(test.type));
element.preload = "auto";
element.src = test.name;
once(element, "playing").then(() => {
ok(element.readyState >= HTMLMediaElement.HAVE_FUTURE_DATA, `playAfterPlaybackStarted(${token})`);
ok(!element.paused, `playAfterPlaybackStarted(${token})`);
element.play().then(
(result) => {
if (result == undefined) {
ok(true, `${token} is resolved with ${result}.`);
} else {
ok(false, `${token} is resolved with ${result}.`);
}
},
(error) => {
ok(false, `${token} is rejected with ${error.name}.`);
}
).then( () => { manager.finished(token); } );
});
element.play();
}
manager.runTests(gSmallTests, initTest);
</script>