<html>
<body>
<input id="textfield" type="text">abcd</input>
<script type="text/javascript">

    var console_messages = document.createElement("ol");
    var console = document.createElement("pre");
    console.appendChild(console_messages);
    document.body.appendChild(console);

    function log(message)
    {
        var item = document.createElement("li");
        item.appendChild(document.createTextNode(String(message).replace(/\n/g, "\\n")));
        console_messages.appendChild(item);
    }
    
    if (window.testRunner) {
        testRunner.dumpAsText();
    
        log("Testing that attributedSubstringFromRange returns a string of the correct length");
        log("The results for oversized requests are incorrect due to <rdar://problem/5400551> which causes a \\n to be appended to the result.");
        document.getElementById("textfield").focus();
        textInputController.setMarkedText("abcd", 4, 0);

        for (var offset = 0; offset <= 4; offset++) {
            for (var length = 0; length <= 4; length++) {
                var substring = textInputController.attributedSubstringFromRange(offset, length);
                try {
                     var expectedLength = (offset + length > 4) ? 4 - offset : length
                     var passed = expectedLength == substring.getLength();
                     log("(offset: " + offset + "  length: " + length + ") [" + (passed ? "PASSED" : "FAILED") + "]: \"" + substring.string() + "\"");
                } catch (e) {
                     log("(offset: " + offset + "  length: " + length + ") [FAILED]: threw exception");
                }
            }
        }
    } else {
        document.write("This must be run by DRT.");
    }
</script>
</body>
</html>