<html>
<script src="../../resources/js-test-pre.js"></script>
<script>
if (window.internals) {
    window.internals.setUsesMockScrollAnimator(true);
    window.internals.setUsesOverlayScrollbars(true);
}

if (window.testRunner) {
    testRunner.waitUntilDone();
    testRunner.dumpAsText();
}

function runTest() {
    if (window.internals)
        internals.updateLayoutAndStyleForAllFrames();
    if (window.eventSender) {
        eventSender.mouseMoveTo(0, 0);
        // Move to a position that is over the vertical scrollbar and the iframe.
        eventSender.mouseMoveTo(window.innerWidth - 4, 100);
        eventSender.mouseDown();
        eventSender.mouseUp();
        eventSender.mouseMoveTo(0, 0);
    }
    if (window.testRunner)
        testRunner.notifyDone();
};
</script>
<script src="../../resources/js-test-post.js"></script>
<body>
  <p>Test for <a href="https://bugs.webkit.org/show_bug.cgi?id=165056">https://bugs.webkit.org/show_bug.cgi?id=165056</a>.</p>
  <iframe onload="runTest()" width="1024" height="768" id="frame" src="data:text/html,<html></html>"></iframe>
  <pre id="console"></pre>
</body>
</html>