border-radius-valid-border-clipping.html

<!DOCTYPE html>
<html>
<head>
<style>
div {
    width: 53px;
    height: 400px;
    border-radius: 30px;
    border-top: 10px solid red;
    border-left: 10px solid blue;
    border-right: 20px solid green;
    border-bottom: 20px solid yellow;
}
</style>
</head>
<body>
<div></div>
</body>
</html>

chromium/third_party/blink/web_tests/fast/borders/border-radius-valid-border-clipping.html