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diff --git a/dom/tests/mochitest/general/test_for_of.html b/dom/tests/mochitest/general/test_for_of.html
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+++ b/dom/tests/mochitest/general/test_for_of.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+ <title>Tests for for-of loops</title>
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
+</head>
+<body onload="doTest()">
+<p id="display"></p>
+<div id="content" style="display: none"></div>
+<script>
+function doTest() {
+ // DOM NodeLists are iterable.
+ var a = [];
+ for (var e of document.body.childNodes)
+ if (e.nodeType === 1)
+ a.push(e.tagName);
+ is("P DIV SCRIPT", a.join(" "), "for-of should see each element in the body");
+
+ SimpleTest.finish();
+}
+SimpleTest.waitForExplicitFinish();
+</script>
+</body>
+</html>