<!DOCTYPE html>
<meta name="assert" content="Test inserting a block-in-inline in the middle of existing block-in-inline">
<link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#anonymous-block-level" />
<link rel="author" title="Koji Ishii" href="mailto:kojii@chromium.org" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
  <div>1</div>
  <span>
    <div id="b2">2</div>
    <div id="b4">4</div>
  </span>
<script>
document.body.offsetTop;

// Both "2" and "4" are block-in-inline children.
// Insert a block child "3" between them.
const b3 = document.createElement('div');
b3.appendChild(document.createTextNode('3'));
b4.parentElement.insertBefore(b3, b4);

// Check if "3" is between "2" and "4".
test(() => {
  assert_greater_than(b3.offsetTop, b2.offsetTop);
  assert_less_than(b3.offsetTop, b4.offsetTop);
});
</script>
</body>
