chromium/third_party/blink/web_tests/editing/pasteboard/copy-paste-float.html

<html>
<head>
    <script>
        function test() {
            if (window.testRunner)
                testRunner.dumpAsText();

            var copySection = document.getElementById("copySection");
            var pasteSection = document.getElementById("pasteSection");
            var selection = window.getSelection();

            selection.selectAllChildren(copySection);
            document.execCommand("Copy");

            selection.collapse(pasteSection, 0);
            document.execCommand("Paste");

            console.log((pasteSection.firstChild.style.getPropertyValue("float") != "left")
                ? "SUCCESS: paste DID NOT keep float:left style."
                : "FAILED: paste DID keep float:left style.");
        }
    </script>
    <style>
        .floatLeft { float:left }
    </style>
</head>
<body onload="test()">

    <p>This test is to see if text within a floating block is put onto the paste board wihtout the float style.</p> 
    <div> 
    <div id="copySection">
        <ul class="floatLeft">
            <li>First LI</li>
            <li>Second LI</li>
        </ul>
    </div>

    <div style="clear:both"><br>---<br></div>
    <div contenteditable="true" id="pasteSection">---</div>

</body>
</html>