<!doctype html>
<html>
<link rel="author" title="Erik Nordin" href="mailto:enordin@mozilla.com">
<link rel="help" href="https://drafts.csswg.org/css-backgrounds-3/#propdef-border">
<link rel="help" href="https://drafts.csswg.org/cssom-1/#serialize-a-css-declaration-block">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1594241">
<meta charset="utf-8">
<title>serialization of border shorthand</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style id="target">
    .a {
        border-width: 1px;
        border-style: solid;
        border-color: black;
    }
    .b {
        border-width: 1px;
        border-style: solid;
        border-color: black;
        border-image: linear-gradient(white,black);
    }
    .c {
        border: 1px solid black;
    }
</style>
<script>
    test(function() {
        let rule = document.getElementById('target').sheet.cssRules[0];
        assert_equals(rule.style.border, "", "border shorthand isn't serialized if border-image longhands are not initial");
    }, "Declaration with border longhands is not serialized to a border shorthand declaration.");
    test(function() {
        let rule = document.getElementById('target').sheet.cssRules[1];
        assert_equals(rule.style.border, "", "border shorthand isn't serialized if border-image longhands are not initial");
    }, "Declaration with border longhands and border-image is not serialized to a border shorthand declaration.");
    test(function() {
        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>