<!DOCTYPE html>
<meta charset="utf-8">
<link rel="author" title="Myles C. Maxfield" href="mmaxfield@apple.com">
<link rel="help" href="https://drafts.csswg.org/css-font-loading-3/#dom-fontfaceset-delete">
<meta name="assert" content="Ensure that calling delete() on a CSS-connected FontFace has no effect." />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
@font-face {
    font-family: "WebFont";
    src: url("resources/Rochester.otf") format("opentype");
}
</style>
<script>
test(function(t) {
    let fonts = document.fonts;
    let font = fonts.keys().next().value;
    assert_equals(fonts.size, 1);
    fonts.delete(font);
    assert_equals(fonts.size, 1);
});
</script>
</html>