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diff --git a/dom/base/test/chrome/test_bug339494.xhtml b/dom/base/test/chrome/test_bug339494.xhtml
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+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=339494
+-->
+<window title="Mozilla Bug 339494"
+ xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+ xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+
+ <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+<body xmlns="http://www.w3.org/1999/xhtml">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=339494">Mozilla Bug 339494</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+ <xul:hbox id="d"/>
+ <xul:hbox id="s"/>
+</div>
+<pre id="test">
+</pre>
+</body>
+
+<script class="testbody" type="application/javascript">
+
+/** Test for Bug 339494 **/
+
+ var d = document.getElementById("d");
+
+ d.setAttribute("hhh", "testvalue");
+
+ document.addEventListener("DOMAttrModified", removeItAgain, false);
+ d.removeAttribute("hhh");
+ document.removeEventListener("DOMAttrModified", removeItAgain, false);
+
+ function removeItAgain()
+ {
+ ok(!d.hasAttribute("hhh"), "Value check 1. There should be no value");
+ isnot(d.getAttribute("hhh"), "testvalue", "Value check 2");
+ document.removeEventListener("DOMAttrModified", removeItAgain, false);
+ d.removeAttribute("hhh");
+ ok(true, "Reachability. We shouldn't have crashed");
+ }
+
+ var s = document.getElementById("s");
+
+ s.setAttribute("ggg", "testvalue");
+
+ document.addEventListener("DOMAttrModified", compareVal, false);
+ s.setAttribute("ggg", "othervalue");
+ document.removeEventListener("DOMAttrModified", compareVal, false);
+
+ function compareVal()
+ {
+ ok(s.hasAttribute("ggg"), "Value check 3. There should be a value");
+ isnot(s.getAttribute("ggg"), "testvalue", "Value check 4");
+ is(s.getAttribute("ggg"), "othervalue", "Value check 5");
+ }
+
+</script>
+
+</window>