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<!--
Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/
-->
<!DOCTYPE HTML>
<html>
<head>
<title>Bug 1450358 - Test AudioContext event listener leak conditions</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript" src="/tests/dom/events/test/event_leak_utils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<script class="testbody" type="text/javascript">
// Manipulate AudioContext objects in the frame's context.
// Its important here that we create a listener callback from
// the DOM objects back to the frame's global in order to
// exercise the leak condition.
async function useAudioContext(contentWindow) {
let ctx = new contentWindow.AudioContext();
ctx.onstatechange = e => {
contentWindow.stateChangeCount += 1;
};
let osc = ctx.createOscillator();
osc.type = "sine";
osc.frequency.value = 440;
osc.start();
}
async function runTest() {
try {
await checkForEventListenerLeaks("AudioContext", useAudioContext);
} catch (e) {
ok(false, e);
} finally {
SimpleTest.finish();
}
}
SimpleTest.waitForExplicitFinish();
addEventListener("load", runTest, { once: true });
</script>
</pre>
</body>
</html>
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