<!DOCTYPE html>
<html>
<head>
<style>
@font-face {
    font-family: "WebFont";
    src: url("resources/tiny-ligature-font.svg") format("svg");
}
</style>
</head>
<body>
This test makes sure that the <code>ch</code> unit falls back to 0.5em on fonts that don't support the 0 character. The test passes if the green box below has the correct width.
<div style="font: 48px 'WebFont'; width: calc(10em / 2); background: green; color: transparent;">AAAA</div>
</body>
</html>
