shrink-to-fit-with-height-stretched-abspos-and-auto-scrollbar-sibling.html

<!DOCTYPE html>
<p>There should be a green square below. No red.</p>
<div style="float:left; position:relative; background:red;">
    <div id="abspos" style="position:absolute; top:0; right:0; bottom:0; left:0; background:green;"></div>
    <div style="width:150px; max-height:150px; overflow:auto;">
        <div id="child" style="width:100px; height:100px;"></div>
    </div>
</div>
<div style="clear:both;"></div>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>
    test(() => {
        var abspos = document.getElementById("abspos");
        var child = document.getElementById("child");
        assert_equals(abspos.offsetWidth, 150);
        assert_equals(abspos.offsetHeight, 100);
        document.body.offsetLeft;
        child.style.height = "400px";
        assert_equals(abspos.offsetWidth, 150);
        assert_equals(abspos.offsetHeight, 150);
    }, "Add content to an overflow:auto container, so that scrollbars appear");
</script>

chromium/third_party/blink/web_tests/fast/block/shrink-to-fit-with-height-stretched-abspos-and-auto-scrollbar-sibling.html