chromium/third_party/blink/web_tests/fast/multicol/relayout-and-push-float.html

<!DOCTYPE html>
<script src="../../resources/check-layout.js"></script>
<p>Test that re-laying out a float and at the same time pushing it downwards properly moves it to
    next column, and that we don't get a residual pagination strut before the second float.</p>
<p>There should be a blue square below.</p>
<div id="container" style="position:relative; -webkit-columns:2; -webkit-column-gap:0; column-fill:auto; width:80px; height:50px; line-height:20px;">
    <span id="newElm" style="display:none;">
        <br>
    </span>
    <br>
    <div id="firstFloat" style="float:left; width:30px; background:blue;" data-offset-y="0">
        <br>
    </div>
    <div style="float:left; width:40px; background:blue;" data-offset-y="20">
        <br>
    </div>
</div>
<script>
    document.body.offsetTop;
    document.getElementById("newElm").style.display = "inline";
    document.getElementById("firstFloat").style.paddingLeft = "10px";
    checkLayout("#container");
</script>