author Cosmin Sabou <>
Sun, 05 Feb 2023 19:37:33 +0000
changeset 651812 d8601249f1eb8c52c742b0c19c9ca0fa8f2e31fe
parent 596374 8945af7c5524dcc692e803f8c868c2bc527da7a0
permissions -rw-r--r--
Bug 1806090 - temporarily disable browser_quickactions.js on linux for frequent failures. r=intermittent-reviewers,MasterWayZ Differential Revision:

  <title>APZ hit-testing over a checkerboarded area</title>
  <script type="application/javascript" src="apz_test_utils.js"></script>
  <script type="application/javascript" src="apz_test_native_event_utils.js"></script>
  <script src="/tests/SimpleTest/paint_listener.js"></script>
  <meta name="viewport" content="width=device-width"/>
 <div id="scroller" style="width: 300px; height: 300px; overflow:scroll; margin-top: 100px; margin-left: 50px">
  <!-- Make the contents tall enough to be sure we can checkerboard -->
  <div id="contents" style="width: 100%; height: 5000px; background-image: linear-gradient(blue,red)">
 <div id="make_root_scrollable" style="height: 5000px"></div>
<script type="application/javascript">

async function test() {
  var config = getHitTestConfig();
  var utils = config.utils;

  var scroller = document.getElementById("scroller");

  // Activate the scrollframe but keep the main-thread scroll position at 0.
  // Also apply an async scroll offset in the y-direction such that the
  // scrollframe scrolls all the way to the bottom of its range, where it's
  // sure to checkerboard.
  utils.setDisplayPortForElement(0, 0, 300, 1000, scroller, 1);
  await promiseApzFlushedRepaints();
  var scrollY = scroller.scrollTopMax;
  utils.setAsyncScrollOffset(scroller, 0, scrollY);
  // Tick the refresh driver once to make sure the compositor has applied the
  // async scroll offset (for WebRender hit-testing we need to make sure WR has
  // the latest info).

  var scrollerViewId = utils.getViewId(scroller);

  // Hit-test the middle of the scrollframe, which is now inside the
  // checkerboarded region, and check that we hit the scrollframe and
  // not its parent.
                 "active scrollframe");

.then(subtestDone, subtestFailed);