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

<!doctype html>
<style>
  body {margin: 0;}
  #top-of-root {background: green; width: 100%; height: 20px;}
</style>

<div id="top-of-root" class="top" tabindex="0"></div>

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="resources/snav-testharness.js"></script>
<script>
  snav.assertFocusMoves([["Down", "top-of-root"]]);
</script>

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

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