() {
        let rule = document.getElementById('target').sheet.cssRules[2];
        assert_not_equals(rule.style.border, "", "border shorthand ");
        assert_equals(rule.cssText, ".c { border: 1px solid black; }");
    }, "Border shorthand is serialized correctly if all border-image-* are set to their initial specified values.");
</script>
</html>
