<!DOCTYPE html>
<html>
<body>
<script src="../../../resources/js-test-pre.js"></script>
<div id="testDiv">TEXT</div>
<script>
description("Tests that DOM mutation observers are notified when Text.data is set to the same string.");
jsTestIsAsync = true;

var testDiv = document.getElementById("testDiv");
var config = { subtree:true, characterData: true, };
var observer = new MutationObserver(function(mutations) {
    testPassed("Mutation observer was notified");
    finishJSTest();
});

observer.observe(testDiv, config);
testDiv.firstChild.data += "";
</script>
<script src="../../../resources/js-test-post.js"></script>
</body>
</html>