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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=748983
-->
<head>
<meta charset="utf-8">
<title>Test for Bug 748983</title>
<script 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=748983">Mozilla Bug 748983</a>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 748983 **/
SimpleTest.waitForExplicitFinish();
function runTest() {
ok(document instanceof EventTarget, "document is an event target");
ok(new XMLHttpRequest() instanceof XMLHttpRequest, "instanceof should work on XHR");
ok(HTMLElement.prototype instanceof Node, "instanceof needs to walk the prototype chain");
var otherWin = document.getElementById("testFrame").contentWindow;
ok(otherWin.HTMLElement.prototype instanceof otherWin.Node, "Same-origin instanceof of a interface prototype object should work, even if called cross-origin");
ok(!(otherWin.HTMLElement.prototype instanceof Node), "Cross-origin instanceof of a interface prototype object shouldn't work");
// We need to reset HTMLElement.prototype.__proto__ to the original value
// before using anything from the harness, otherwise the harness code breaks
// in weird ways.
HTMLElement.prototype.__proto__ = otherWin.Element.prototype;
var [ shouldSucceed, shouldFail ] = otherWin.runTest();
shouldSucceed = shouldSucceed && HTMLElement.prototype instanceof otherWin.Element;
shouldFail = shouldFail && HTMLElement.prototype instanceof Element;
HTMLElement.prototype.__proto__ = Element.prototype;
ok(shouldSucceed, "If an interface prototype object is on the protochain then instanceof with the interface object should succeed");
ok(!shouldFail, "If an interface prototype object is not on the protochain then instanceof with the interface object should succeed");
SimpleTest.finish();
}
</script>
</pre>
<iframe id="testFrame" src="file_InstanceOf.html" onload="runTest()"></iframe>
</body>
</html>
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