css/cssom/CSSStyleSheet.html

<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <title>CSSOM - CSSStyleSheet interface</title>
    <link rel="help" href="https://drafts.csswg.org/cssom/#the-cssstylesheet-interface">
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <style id="my-stylesheet">
        body { width: 50%; }
        #foo { height: 100px; }
    </style>

    <script>
    test(function () {
        var styleSheet = document.styleSheets[0];
        styleSheet.cssRules[0].randomProperty = 1;
        styleSheet.cssRules[1].randomProperty = 2;

        assert_equals(styleSheet, document.getElementById("my-stylesheet").sheet, "CSSStyleSheet and LinkStyle's sheet attribute");
        assert_equals(styleSheet.cssRules.length, 2, "CSSStyleSheet cssRules attribute");
        assert_equals(styleSheet.cssRules[0].cssText, "body { width: 50%; }", "CSSStyleSheet cssRules attribute");
        assert_equals(styleSheet.cssRules[1].cssText, "#foo { height: 100px; }", "CSSStyleSheet cssRules attribute");
        assert_equals(styleSheet.cssRules[2], undefined, "CSSStyleSheet cssRules attribute");

        styleSheet.insertRule("#bar { margin: 10px; }", 1);
        assert_equals(styleSheet.cssRules.length, 3, "CSSStyleSheet cssRules attribute after insertRule function");
        assert_equals(styleSheet.cssRules[0].cssText, "body { width: 50%; }", "CSSStyleSheet cssRules attribute");
        assert_equals(styleSheet.cssRules[1].cssText, "#bar { margin: 10px; }", "CSSStyleSheet cssRules attribute after insertRule function");
        assert_equals(styleSheet.cssRules[2].cssText, "#foo { height: 100px; }", "CSSStyleSheet cssRules attribute after insertRule function");
        assert_equals(styleSheet.cssRules[0].randomProperty, 1, "[SameObject] cssRules attribute after insertRule function");
        assert_equals(styleSheet.cssRules[2].randomProperty, 2, "[SameObject] cssRules attribute after insertRule function");

        styleSheet.deleteRule(1);
        assert_equals(styleSheet.cssRules.length, 2, "CSSStyleSheet cssRules attribute after deleteRule function");
        assert_equals(styleSheet.cssRules[0].cssText, "body { width: 50%; }", "CSSStyleSheet cssRules attribute after deleteRule function");
        assert_equals(styleSheet.cssRules[1].cssText, "#foo { height: 100px; }", "CSSStyleSheet cssRules attribute after deleteRule function");
        assert_equals(styleSheet.cssRules[2], undefined, "CSSStyleSheet cssRules attribute after deleteRule function");
        assert_equals(styleSheet.cssRules[0].randomProperty, 1, "[SameObject] cssRules attribute after deleteRule function");
        assert_equals(styleSheet.cssRules[1].randomProperty, 2, "[SameObject] cssRules attribute after deleteRule function");

        styleSheet.removeRule();
        assert_equals(styleSheet.cssRules.length, 1, "CSSStyleSheet cssRules attribute after removeRule function");
        assert_equals(styleSheet.cssRules[0].cssText, "#foo { height: 100px; }", "CSSStyleSheet cssRules attribute after removeRule function");

        assert_equals(styleSheet.addRule("@media all", "#foo { color: red }"), -1);
        assert_equals(styleSheet.cssRules.length, 2, "CSSStyleSheet cssRules attribute after addRule function");
        assert_true(styleSheet.cssRules[1] instanceof CSSMediaRule, "CSSStyleSheet addRule does some silly string concatenation");

        styleSheet.removeRule(1);
        assert_equals(styleSheet.cssRules.length, 1, "CSSStyleSheet cssRules attribute after removeRule function with index");
        assert_equals(styleSheet.cssRules[0].cssText, "#foo { height: 100px; }", "CSSStyleSheet cssRules attribute after deleteRule function with index");

        assert_equals(styleSheet.addRule("#foo", "color: red"), -1);
        assert_equals(styleSheet.cssRules.length, 2, "CSSStyleSheet cssRules attribute after addRule function with simple selector");
        assert_equals(styleSheet.cssRules[1].cssText, "#foo { color: red; }", "CSSStyleSheet cssRules attribute after addRule function without index appends to the end");

        assert_equals(styleSheet.addRule("#foo", "color: blue", 0), -1);
        assert_equals(styleSheet.cssRules.length, 3, "CSSStyleSheet cssRules attribute after addRule function with simple selector with index");
        assert_equals(styleSheet.cssRules[0].cssText, "#foo { color: blue; }", "addRule function with index performs an insertion");

        assert_equals(styleSheet.addRule(), -1);
        assert_equals(styleSheet.cssRules.length, 4, "CSSStyleSheet cssRules attribute after addRule function without arguments");
        assert_equals(styleSheet.cssRules[3].cssText, "undefined { }", "addRule arguments default to undefined");

        assert_equals(styleSheet.cssRules, styleSheet.rules, "CSSStyleSheet.rules returns the same object as CSSStyleSheet.cssRules");
    });
    </script>
</head>
</html>