chromium/third_party/blink/web_tests/external/wpt/css/css-fonts/font-palette-empty-font-family.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Tests that an empty font family name is handled correctly</title>
<link rel="help" href="https://drafts.csswg.org/css-fonts/#font-family-2-desc">
<link rel="author" title="Myles C. Maxfield" href="mailto:[email protected]">
<link rel="match" href="font-palette-empty-font-family-ref.html">
<style>
@font-face {
    font-family: "";
    src: url("resources/COLR-palettes-test-font.ttf") format("truetype");
}

@font-palette-values --MyPalette {
    font-family: "";
    base-palette: 1;
}
</style>
</head>
<body>
<div style="font: 48px ''; font-palette: --MyPalette;">A</div>
</body>
</html>