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Test Info:

<!doctype html>
<html lang=en>
<meta charset=utf-8>
<title>CSS-contain test: paint containment use the padding edge</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">
<meta name=flags content="">
<meta name=assert content="paint containment clips at the padding edge, not content edge, and takes corner clipping into account">
<link rel="match" href="reference/contain-paint-001-ref.html">
<style>
div {
width: 100px;
height: 100px;
background: blue;
padding: 50px;
border-radius: 100px;
contain: paint;
}
div::before {
content:"";
display: block;
background: green;
width: 100px;
height: 100px;
}
div::after {
content:"";
display: block;
background: red;
width: 50px;
height: 50px;
margin-top: 38px;
margin-left: -50px;
}
</style>
<p>Test passes if there is a green square in a rounded blue box, and no red.
<div></div>