<!DOCTYPE html>
<html>
<head>
<script>
function log(text) {
    var log = document.getElementById('log');
    log.appendChild(document.createTextNode(text));
    log.appendChild(document.createElement('br'));
}

function dragStartTest(e) {
    if (e.__proto__ == DragEvent.prototype)
        log('PASS: event is a DragEvent');
    else
        log('FAIL: event is not a DragEvent');
    e.dataTransfer.setData('text/plain', 'dragstart test');
    if (event.dataTransfer.types.indexOf('text/plain') < 0 ||
        event.dataTransfer.getData('text/plain') != 'dragstart test')
        log('dragstart: FAILED');
    else
        log('dragstart: SUCCESS');
}

function runTest() {
    if (!window.testRunner)
        return;
    testRunner.dumpAsText();

    var draggedElement = document.getElementById('draggedElement');
    var x = draggedElement.offsetLeft + draggedElement.offsetWidth / 2;
    var y = draggedElement.offsetTop + draggedElement.offsetHeight / 2;

    eventSender.mouseMoveTo(x, y);
    eventSender.mouseDown();
    eventSender.leapForward(100);
    eventSender.mouseMoveTo(x + 100, y + 100);
    eventSender.mouseUp();
}
</script>
</head>
<body onload="runTest()">
<p>Simple test that data set during a dragstart event can be read back. To run
the test manually, simply start dragging the 'Drag Me' element below.
<div id="draggedElement" draggable="true" ondragstart="dragStartTest(event)">Drag Me</div>
<div id="log"></div>
</html>