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chromium/third_party/blink/web_tests/external/wpt/css/CSS2/floats/hit-test-floats-001.html 

<!DOCTYPE html>
<link rel="help" href="https://crbug.com/977856">
<link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#floats" />
<link rel="author" title="Koji Ishii" href="mailto:[email protected]">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div style="width: 270px">
  <img width="260" height="68">
  <div style="float: left">
    <a id="target" href="#">Link</a>
  </div>
  <br style="clear: both">
</div>
<script>
test(() => {
  let target = document.getElementById('target');
  let bounds = target.getBoundingClientRect();
  let element = document.elementFromPoint(bounds.x + 1, bounds.y + 1);
  assert_equals(element, target);
});
</script>