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Test Info:

<!doctype html>
<html>
<head>
<title>document.getElementsByClassName(): adding element with class</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body class="a">
<div id="log"></div>
<script>
test(function() {
var collection = document.getElementsByClassName("a");
var ele = document.createElement("foo");
ele.setAttribute("class", "a");
document.body.appendChild(ele);
assert_array_equals(collection, [document.body, ele]);
})
</script>
</body>
</html>