test_bug694754.xhtml

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<!DOCTYPE HTML>

<html xmlns="http://www.w3.org/1999/xhtml"

      xmlns:test="http://example.com/test">

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=694754

-->

<head>

  <title>Test for Bug 694754</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=694754">Mozilla Bug 694754</a>

<p id="display"></p>

<div id="content" style="display: none">

</div>

<pre id="test">

<script type="application/javascript">

/** Test for Bug 694754 **/

/*

The following code tests if calling the DOM methods Document::lookupNamespaceURI

and Document::lookupPrefix directly (with quickstubs) and through XPCOM leads

to the same result.

This test makes use of the bug/feature that deleting a method from the

prototype forces the engine to go through XPCOM.

*/

// Document::lookupPrefix called directly (quickstubs)

var prefixDirect = document.lookupPrefix("http://example.com/test");

is(prefixDirect, "test",

   "calling Document::lookupPrefix through quickstubs works");

// Document::lookupPrefix called via XPCOM

var proto = Object.getPrototypeOf(document);

delete(proto.lookupPrefix);

var prefixThroughXPCOM = document.lookupPrefix("http://example.com/test");

is(prefixThroughXPCOM, "test",

   "calling Document::lookupPrefix through XPCOM works");

// Document::lookupNamespaceURI called directly (quickstubs)

var namespaceDirect = document.lookupNamespaceURI(null);

is(namespaceDirect, "http://www.w3.org/1999/xhtml",

   "calling Document::lookupNamespaceURI through quickstubs works");

// Document::lookupNamespaceURI called via XPCOM

delete(proto.lookupNamespaceURI);

var namespaceThroughXPCOM = document.lookupNamespaceURI(null);

is(namespaceThroughXPCOM, "http://www.w3.org/1999/xhtml",

   "calling Document::lookupNamespaceURI through XPCOM works");

// Document::isDefaultNamespace called directly (quickstubs)

var isDefaultNamespaceDirect = document.isDefaultNamespace("http://www.w3.org/1999/xhtml");

is(isDefaultNamespaceDirect, true,

   "Default namespace correctly detected through quickstubs");

// Document::isDefaultNamespace called via XPCOM

delete(proto.isDefaultNamespace);

var isDefaultNamespaceXPCOM = document.isDefaultNamespace("http://www.w3.org/1999/xhtml");

is(isDefaultNamespaceXPCOM, true,

   "Default namespace correctly detected through XPCOM");

</script>

</pre>

</body>

</html>