mozilla-central/dom/events/test/test_bug1127588.html (file symbol)

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Test Info:

<!DOCTYPE HTML>
<html>
<!--
-->
<head>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none">
<script type="application/javascript">
/** Test for Bug 1127588 **/
SimpleTest.waitForExplicitFinish();
window.onload = function() {
SpecialPowers.pushPrefEnv({"set": [["dom.mutation_events.enabled", true]]}, test);
}
function test() {
let insertedEventCount = 0;
let insertedListener = function() {
insertedEventCount++;
};
let removedEventCount = 0;
let removedListener = function() {
removedEventCount++;
};
// Tests for no title element.
document.addEventListener('DOMNodeRemoved', removedListener);
document.addEventListener('DOMNodeInserted', insertedListener);
document.title = "Test for Bug 1127588";
document.removeEventListener('DOMNodeInserted', insertedListener);
document.removeEventListener('DOMNodeRemoved', removedListener);
// Check result.
is(insertedEventCount, 2, "Should get 'DOMNodeInserted' mutation event");
is(removedEventCount, 0, "Should not get 'DOMNodeRemoved' mutation event");
// Test for updating title element.
insertedEventCount = 0;
removedEventCount = 0;
document.addEventListener('DOMNodeRemoved', removedListener);
document.addEventListener('DOMNodeInserted', insertedListener);
// eslint-disable-next-line no-self-assign
document.title = document.title;
document.removeEventListener('DOMNodeInserted', insertedListener);
document.removeEventListener('DOMNodeRemoved', removedListener);
// Check result.
is(insertedEventCount, 1, "Should get 'DOMNodeInserted' mutation event");
is(removedEventCount, 1, "Should get 'DOMNodeRemoved' mutation event");
SimpleTest.finish();
};
</script>
</body>
</html>