chromium/third_party/blink/web_tests/external/wpt/css/css-sizing/aspect-ratio/flex-aspect-ratio-037.html

<!DOCTYPE html>
<title>aspect-ratio flex item</title>
<link rel="help" href="https://drafts.csswg.org/css-flexbox/#algo-main-item"
  title="Part E">
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht" />
<meta name="assert"
  content="max-content block size accounts for inline max-content size of an aspect-ratio item when computing flex base size">

<style>
  #reference-overlapped-red {
    position: absolute;
    background-color: red;
    width: 100px;
    height: 100px;
    z-index: -1;
  }
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.
</p>

<div id="reference-overlapped-red"></div>
<div style="display: flex; flex-flow: column; align-items: start;">
  <div style="aspect-ratio: 1/1; background: green; min-height: 0px;">
    <div style="width: 100px;"></div>
  </div>
</div>