<head>
<script>
function test()
{
    if (window.testRunner)
        testRunner.dumpAsText();
    var testString = "";
    testString += String.fromCharCode(0x200B);
    testString += String.fromCharCode(0x200C);
    testString += String.fromCharCode(0x200D);
    testString += String.fromCharCode(0x200E);
    testString += String.fromCharCode(0x200F);
    testString += String.fromCharCode(0xFEFF);
    var span = document.getElementById("characters");
    var abWidth = span.offsetWidth;
    span.firstChild.data = "a";
    var aWidth = span.offsetWidth;
    span.firstChild.data = "a" + testString + "b";
    var abWithCharactersWidth = span.offsetWidth;

    var testArea = document.getElementById("testArea");
    testArea.parentNode.removeChild(testArea);

    if (abWithCharactersWidth > abWidth)
        result = "FAIL: One or more of the characters had a non-zero width.";
    else if (abWidth > aWidth)
        result = "PASS: All the characters had zero width.";
    else
        result = "FAIL: Width measurement seems to have failed.";

    document.getElementById("result").firstChild.data = result;
}
</script>
</head>
<body onload="test()">
<p>This test checks various characters that should always be zero width to ensure that they are.
The WebKit text system ensures this in a way that's independent of the fonts installed on the system.</p>
<p id="result">FAIL: Script did not run to completion.</p>
<p id="testArea"><span id="characters">ab</span></p>
</body>
