gecko-dev/dom/media/test/test_play_promise_16.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: loadAlgorithmResolveOrdering
// Case: invoke load() on an element should resolve pending promises in order.
// Expected result: the pending promises are resolved in order.
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, "canplay").then(() => {
let firstPromiseResolved = false;
// play
element.play().then(
() => { firstPromiseResolved = true; },
() => { ok(false, `loadAlgorithmResolveOrdering(${token}) should not be rejected.`); }
);
// play again
element.play().then(
() => { ok(firstPromiseResolved, `loadAlgorithmResolveOrdering(${token}), the first play should already be resolved.`); },
() => { ok(false, `loadAlgorithmResolveOrdering(${token}) should not be rejected.`); }
).then( () => { manager.finished(token); } );
// triger load
element.src = test.name;
});
}
manager.runTests(gSmallTests, initTest);
</script>