mozilla-release/layout/reftests/text/justification-2a.html

<!DOCTYPE HTML>
<html>
<head>
<style>
span { display:inline-block; width:100px; height:10px; background:yellow; }
</style>
</head>
<!-- Test that justify actually works. 3 spans won't fit on a line so there will be
     two spans plus 100px of justification space on the first line. -->
<body style="text-align:justify; width:300px;">
<span></span> <span></span>
<span></span>
</body>
</html>