overflow-hidden-rounded-corners-occlusion.html

<!DOCTYPE HTML>
<html>
<body>
    Test that verifies that rounded corners with overflow:hidden composite correctly. <br>
    This page should show a green box with rounded corners on top of a yellow box with square corners.
    <div style="width:100px; height:100px; background-color:yellow;">
        <div style="width:100px; height:100px; background-color:red; border-radius:40px; overflow:hidden">
            <div style="width:100px; height:100px; background-color:green;"></div>
        </div>
    </div>
</body>
</html>

chromium/third_party/blink/web_tests/fast/layers/overflow-hidden-rounded-corners-occlusion.html