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diff --git a/dom/tests/mochitest/chrome/test_indexedSetter.html b/dom/tests/mochitest/chrome/test_indexedSetter.html
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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=715156
+-->
+<head>
+ <meta charset="utf-8">
+ <title>Test for Bug 715156</title>
+ <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css">
+ <script type="application/javascript">
+
+ /** Test for Bug 715156 **/
+
+ function runTests() {
+ var doc = document.getElementById("testFrame").contentDocument;
+ var options = doc.createElement("select").options;
+ ok(Components.utils.isXrayWrapper(options), "should be an Xray wrapper");
+ var option = doc.createElement("option");
+ options[4] = option;
+ is(options.length, 5, "setting an indexed property through an Xray wrapper should work")
+ is(options[4], option, "setting an indexed property through an Xray wrapper should work")
+ SimpleTest.finish();
+ }
+
+ SimpleTest.waitForExplicitFinish();
+ addLoadEvent(runTests);
+
+ </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=715156">Mozilla Bug 715156</a>
+<p id="display"></p>
+<iframe id="testFrame"></iframe>
+<pre id="test">
+</pre>
+</body>
+</html>