chromium/third_party/blink/web_tests/css3/motion-path/zero-length.html

<!DOCTYPE html>
<html>
<head>
<style>
#div1 {
    position: absolute;
    offset: path('M100,100L100,100') 0% 0deg;
    transform-origin: 0 0;
    offset-anchor: 0 0;
}
</style>
</head>
<body>
<div id="div1">div1</div>
</body>
</html>