css/css-masking/clip-path/clip-path-inline-008.html

<!DOCTYPE html>
<title>clip-path on inline with margin-box and border-radius</title>
<link rel="help" href="https://drafts.csswg.org/css-shapes-1/#valdef-shape-box-margin-box">
<link rel="help" href="https://drafts.csswg.org/css-shapes-1/#typedef-shape-box">
<link rel="match" href="clip-path-inline-008-ref.html">
<meta name="fuzzy" content="maxDifference=0-14; totalPixels=0-240">
<meta content="ahem" name="flags">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
<style>
  .container {
    font: 50px/1 Ahem;
    line-height: 50px;
  }
  .container > span {
    margin: 25px;
    border-radius: 50px;
    clip-path: margin-box;
    color: green;
    /* This outline draws far outside the margin box and should be partially clipped. */
    outline: 200px solid green;
    /* Disables margin collapsing. */
    float: left;
  }
</style>
<p>Test passes if there is a filled green circle with radius 50px.
<div class="container">
  <span>X</span>
</div>