snav-focusable-at-top-of-scroller.html

<!doctype html>
<style>
  #scroller {background: yellow; width: 130px; height: 80px; overflow: scroll;}
  #insider-at-top {background: purple; width: 130px; height: 20px; margin-bottom: 300px}
</style>

<div id="scroller" tabindex="0">
  <div id="insider-at-top" class="top" tabindex="0">at top of scroller</div>
</div>

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="resources/snav-testharness.js"></script>
<script>
  var resultMap = [
    ["Down", "scroller"],
    ["Down", "insider-at-top"]
  ];
  snav.assertFocusMoves(resultMap);
</script>

<p><em>Manual test instruction: Ensure the insider is reachable even though it sits at the very top of the scroller.</em></p>

chromium/third_party/blink/web_tests/fast/spatial-navigation/snav-focusable-at-top-of-scroller.html