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Test Info:

<!DOCTYPE HTML>
<html>
<head>
<title>MSE: basic functionality</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript" src="mediasource.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<pre id="test">
<script class="testbody" type="text/javascript">
SimpleTest.waitForExplicitFinish();
runWithMSE(async (ms, el) => {
await once(ms, "sourceopen");
const sb = ms.addSourceBuffer("video/webm");
sb.appendBuffer(new Uint8Array(await fetchWithXHR("seek.webm")));
sb.addEventListener("updateend", () => ms.endOfStream());
// Test "ended" is fired when seeking to the end of the media
// once the duration is known.
ms.onsourceended = () => el.currentTime = el.duration;
await once(el, "ended");
SimpleTest.finish();
});
</script>
</pre>
</body>
</html>