chromium/third_party/blink/web_tests/editing/inserting/insert-paste-bidi-control.html

<html> 
<head>

<style>
.editing { 
    border: 2px solid red; 
    padding: 12px; 
    font-size: 24px; 
}
</style>
<script src=../editing.js language="JavaScript" type="text/JavaScript" ></script>

<script>
function log(str) 
{
    var li = document.createElement("li");
    li.appendChild(document.createTextNode(str));
    var console = document.getElementById("console");
    console.appendChild(li);
}

function convertStringToUnicode(string)
{
    var returnValue = " (character in Unicode value): ";
    for (var i = 0; i < string.length; ++i)
    {
        returnValue += " " + string.charCodeAt(i);
    }
    return returnValue;
}

function assertEqual(test_name, actual, expected)
{
    if (actual != expected) {
        log("==================================");
        log("FAILED: " + test_name);
        var actual_string = "actual" + convertStringToUnicode(actual);
        var expected_string = "expected" + convertStringToUnicode(expected);
        log(actual_string);
        log(expected_string);
    }
}


function test(element)
{
    var textarea = document.getElementById(element + "1");
    textarea.focus();
    // Type in unicode bidi control character in the middle of a string.
    typeCharacterCommand('a');
    typeCharacterCommand(String.fromCharCode(0x202B));
    typeCharacterCommand('b');
    typeCharacterCommand('!');
    typeCharacterCommand(String.fromCharCode(0x202C));

    var string = textarea.innerHTML;
    assertEqual("type a&#x202B;b!&#x202C;", string, "a\u202Bb!\u202c");

    // Copy and past string contains unicode bidi control character in the middle.
    document.execCommand("SelectAll");
    copyCommand();
    textarea = document.getElementById(element + "3");
    textarea.focus();
    pasteCommand(); 

    string = textarea.innerHTML;
    assertEqual("copy/paste a&#x202B;b!&#x202C;", string, "a\u202Bb!\u202c");

    textarea = document.getElementById(element + "2");
    textarea.focus();
    // Type in unicode bidi control character as the beginning of a string.
    typeCharacterCommand(String.fromCharCode(0x202B));
    typeCharacterCommand('b');
    typeCharacterCommand('!');
    typeCharacterCommand(String.fromCharCode(0x202C));

    string = textarea.innerHTML;
    assertEqual("type &#x202B;b!&#x202C;", string, "\u202Bb!\u202c");

    // Copy and past string contains unicode bidi control character at the beginning.
    document.execCommand("SelectAll");
    copyCommand();
    textarea = document.getElementById(element + "4");
    textarea.focus();
    pasteCommand(); 

    string = textarea.innerHTML;
    assertEqual("copy/paste &#x202B;b!&#x202C;", string, "\u202Bb!\u202c");
}

onload = function()
{
    if (window.testRunner)
        testRunner.dumpAsText();
    test("div");
}
</script>

<title>Editing Test</title> 
</head> 
<body>
<div contenteditable id="div1" class="editing"></div>

<div contenteditable id="div2" class="editing"></div>

<div contenteditable id="div3" class="editing"></div>

<div contenteditable id="div4" class="editing"></div>
<ul id="console"></ul>
</body>
</html>