chromium/third_party/blink/web_tests/editing/inserting/paragraph-outside-nested-divs.html

<body contentEditable="true">
<p>When inserting a new line, we should break out of nested divs.</p>
<p id="results"><p>
<div>first<div>second</div><div>third</div></div>
</body>
<script src="../editing.js"></script>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();
    if (window.internals)
        internals.settings.setEditingBehavior("mac");
    function fail(msg) {
        document.getElementById("results").innerText = "FAIL";
        throw msg;
    }

    // Try inserting a new line after the last div.
    var div2 = document.getElementsByTagName("div")[1];
    var div3 = document.getElementsByTagName("div")[2];
    execSetSelectionCommand(div3, 0, div3, 0);
    execMoveSelectionForwardByWordCommand();

    execTypeCharacterCommand("\n");
    execInsertHTMLCommand("This should be in a single div.");

    var div4 = document.getElementsByTagName("div")[3];
    if (div4.innerHTML != "This should be in a single div.")
        fail("wrong div4? " + div4.innerHTML);
    if (div4.parentNode.tagName != "BODY")
        fail("div should not be nested: " + div4.parentNode.tagName);

    // Try inserting a new line after the second div.  This should be nested.
    execSetSelectionCommand(div2, 0, div2, 0);
    execMoveSelectionForwardByWordCommand();

    execTypeCharacterCommand("\n");
    execInsertHTMLCommand("This should be in nested divs.");

    var nestedDiv = document.getElementsByTagName("div")[2];
    if (nestedDiv.innerHTML != "This should be in nested divs.")
        fail("wrong nestedDiv? " + nestedDiv.innerHTML);
    if (nestedDiv.parentNode.tagName != "DIV")
        fail("div should be nested: " + nestedDiv.parentNode.tagName);

    document.getElementById("results").innerText = "SUCCESS";
</script>