LayoutTests/fast/xmlhttprequest/xmlhttprequest-bad-mimetype.html

<p>This test checks for <a href="rdar://problem/5303567">&lt;rdar://problem/5303567&gt;</a> REGRESSION: XMLHttpRequest.responseXML returns NULL if response MIME type is not XML -- breaks Wikipedia widget</p>
<hr>

<pre id="console"></pre>

<script>
function log(s)
{
    document.getElementById("console").appendChild(document.createTextNode(s + "\n"));
}

function logProperty(object, propertyName)
{
    var property;
    try {
        property = object[propertyName];
    } catch(e) {
        property = e;
    }
    
    if (String(property).indexOf("\n") != -1)
        property = property.split("\n")[0] + "...";
    log(propertyName + ": " + property + " (" + typeof property + ")");
}

function sendRequest(url) 
{
    request = new XMLHttpRequest();
    request.open("GET", url, false);
    request.send(null);
    return request;
}

function test(url)
{
    try {
        sendRequest(url);
        log("PASS: No exception.");
    } catch(e) {
        log("FAIL: Caught exception " + e + ".");
    }

    var properties = [
        "readyState",
        "responseText",
        "responseXML",
        "status",
        "statusText",
    ];
    
    for (var i = 0; i < properties.length; i++) //>
        logProperty(request, properties[i]);
}

if (window.testRunner)
    testRunner.dumpAsText();
test("resources/plist.app");
</script>