lock-renderer-for-middle-click-autoscroll.html

<!DOCTYPE html>
<title>Lock input events to single renderer when middle click autoscroll is in progress</title>
<style>
#target-iframe1 {
  height: 100px;
  width: 100px;
  overflow-y: scroll;
  position: absolute;
  left: 100px;
  top: 100px;
}
</style>
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<script src='/js-test-resources/gesture-util.js'></script>
<script>
  var container;
  var scrollOffset;

  async_test(t => {
    // On document load, perform middle click 20px above the container
    // of iframe and start moving mouse in vertical direction such that cursor
    // is over OOPIF. If the bug repros (crbug.com/872832), cursor changes
    // back to pointer once mouse move over OOPIF and will not scroll the root
    // frame. Test will time out as it will wait for scroll to happen.
     window.addEventListener('load', async () => {
       container = document.getElementById('container');
       var subFrame = document.getElementsByTagName('iframe')[0];
       var startX = subFrame.offsetLeft + (subFrame.offsetWidth / 2);
       var startY = subFrame.offsetTop - 20;
       var endX =  startX;
       var endY = subFrame.offsetTop + subFrame.offsetHeight / 2;

       await mouseMoveTo(startX, startY);
       // middle click at startX startY
       await mouseClickOn(startX, startY, 1);
       await mouseMoveTo(endX, endY);
       await waitFor(() => {
         return (container.scrollTop > 0);
       });
       // Left click to cancel middle click autoscroll.
       await mouseClickOn(endX, endY);
       // Wait for the cursor shape to go back to normal.
       await waitFor(() => {
         var cursorInfo = internals.getCurrentCursorInfo();
         return cursorInfo === "type=Pointer" || cursorInfo === "type=IBeam";
       });

       t.step(() => { assert_greater_than(container.scrollTop, 0 ,
                    "Root frame scroll offset must be greater than 0.")});
       t.done();
    });
});
</script>
<div id="container" style="height: 400px; width: 400px; overflow: auto">
    <div id="filler" style="height:4000px; width: 4000px"></div>
<iframe id="target-iframe1"
  src="http://localhost:8080/misc/resources/cross-origin-subframe-for-scrolling.html">
</iframe>
</div>
chromium/third_party/blink/web_tests/http/tests/misc/lock-renderer-for-middle-click-autoscroll.html
