chromium/third_party/blink/web_tests/fast/forms/calendar-picker/month-picker-scrubby-scrollbar.html

<!DOCTYPE html>
<meta name=fuzzy content="maxDifference=0-3; totalPixels=0-1000">
<link rel=author href="mailto:[email protected]">
<link rel=help href="https://bugs.chromium.org/p/chromium/issues/detail?id=1321616">
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script src="../../../resources/testdriver.js"></script>
<script src="../../../resources/testdriver-vendor.js"></script>
<script src="../resources/common.js"></script>
<script src="../resources/picker-common.js"></script>
<script src="resources/calendar-picker-common.js"></script>

<input type=month id=picker>

<script>
const openPickerAndGetThumb = async () => {
  await openPicker(picker);
  const scrubby = internals.pagePopupWindow.global.picker.yearListView_.scrubbyScrollBar;
  const thumb = scrubby.element.querySelector('.scrubby-scroll-thumb');
  const originalTop = thumb.style.top;
  const thumbOffset = cumulativeOffset(thumb);
  return { thumb, thumbX: thumbOffset[0] + 1, thumbY: thumbOffset[1] + 1, originalTop };
}

promise_test(async () => {
  const {thumb, thumbX, thumbY, originalTop} = await openPickerAndGetThumb();

  eventSender.mouseMoveTo(thumbX, thumbY);
  eventSender.mouseDown();
  eventSender.mouseMoveTo(thumbX, thumbY - 15);
  skipAnimation();
  eventSender.mouseUp();
  skipAnimation();
  assert_equals(thumb.style.top, originalTop);
}, `Verifies that the date picker's scrubby scrollbar returns to its initial state after being clicked and dragged.`);

promise_test(async () => {
  const {thumb, thumbX, thumbY, originalTop} = await openPickerAndGetThumb();

  eventSender.clearTouchPoints();
  eventSender.addTouchPoint(thumbX, thumbY);
  eventSender.touchStart();
  eventSender.updateTouchPoint(0, thumbX, thumbY - 15);
  eventSender.touchMove();
  skipAnimation();
  eventSender.releaseTouchPoint(0);
  eventSender.touchEnd();
  skipAnimation();
  assert_equals(thumb.style.top, originalTop);
}, `Verifies that the date picker's scrubby scrollbar returns to its initial state after being touched and dragged.`);

</script>