gecko-dev/dom/media/test/test_play_promise_1.html

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HTML

<!DOCTYPE HTML>
<html>
<head>
<title>Media test: promise-based play() method</title>
<script 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: playBeforeCanPlay
// Case: invoke play() on an element that doesn't have enough data
// Expected result: resolve the promise
let manager = new MediaTestManager;
function initTest(test, token) {
manager.started(token);
let element = document.createElement(getMajorMimeType(test.type));
element.src = test.name;
ok(element.readyState == HTMLMediaElement.HAVE_NOTHING);
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); } );
}
manager.runTests(gSmallTests, initTest);
</script>