gecko-dev/content/events/test/test_bug742376.html

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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=402089
-->
<head>
<title>Test for Bug 742376</title>
<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=742376">Mozilla Bug 742376</a>
<script class="testbody" type="text/javascript">
/** Test for Bug 742376 **/
function getListenerCount() {
var Cc = SpecialPowers.wrap(Components).classes;
var Ci = SpecialPowers.wrap(Components).interfaces;
var dss = Cc["@mozilla.org/devicesensors;1"].getService(Ci.nsIDeviceSensors);
return dss.listenerCount(Ci.nsIDeviceSensorData.TYPE_ORIENTATION);
}
var startListenerCount = getListenerCount();
function dumbListener(event) {}
function dumbListener2(event) {}
window.addEventListener("deviceorientation", dumbListener, false);
window.addEventListener("deviceorientation", dumbListener2, false);
window.setTimeout(function() {
window.removeEventListener("deviceorientation", dumbListener, false);
window.setTimeout(function() {
window.removeEventListener("deviceorientation", dumbListener2, false);
window.setTimeout(function() {
is (getListenerCount(), startListenerCount, "Must have the same listeners at this point");
SimpleTest.finish();
}, 0);
}, 0);
}, 0);
SimpleTest.waitForExplicitFinish();
</script>
</pre>
</body>
</html>