gecko-dev/dom/tests/mochitest/webcomponents/test_custom_element_clone_c...

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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1081039
-->
<head>
<title>Test callbacks for cloned custom elements.</title>
<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.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=1081039">Bug 1081039</a>
<script>
SimpleTest.waitForExplicitFinish();
// Test to make sure created callback is called on clones that are upgraded and clones
// created after registering the custom element.
var callbackCalledOnUpgrade = false;
var callbackCalledOnClone = false;
var foo = document.createElement("x-foo");
var fooClone = foo.cloneNode(true);
var p = Object.create(HTMLElement.prototype);
p.createdCallback = function() {
is(this.__proto__, p, "Correct prototype should be set on custom elements.");
if (this == fooClone) {
// Callback called for the element created before registering the custom element.
// Should be called on element upgrade.
is(callbackCalledOnUpgrade, false, "Upgrade should only be called once per clone.");
callbackCalledOnUpgrade = true;
} else if (this != foo) {
// Callback called for the element created after registering the custom element.
is(callbackCalledOnClone, false, "Upgrade should only be called once per clone.");
callbackCalledOnClone = true;
}
if (callbackCalledOnUpgrade && callbackCalledOnClone) {
SimpleTest.finish();
}
};
document.registerElement("x-foo", { prototype: p });
var anotherFooClone = foo.cloneNode(true);
SimpleTest.waitForExplicitFinish();
</script>
</body>
</html>