CSSGroupingRule-insertRule.html

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This WPT test may be referenced by the following Test IDs:
- /css/cssom/CSSGroupingRule-insertRule.html - WPT Dashboard Interop Dashboard

<!doctype html>

<html>

<head>

    <meta charset="utf-8">

    <title>CSSOM - CSSGroupingRule - insertRule</title>

    <link rel="help" href="https://drafts.csswg.org/cssom/#the-cssgroupingrule-interface">

    <script src="/resources/testharness.js"></script>

    <script src="/resources/testharnessreport.js"></script>

    <script>

    function create(t) {

        var style = document.createElement('style');

        style.appendChild(document.createTextNode('@media all { * {} }'));

        document.head.appendChild(style);

        t.add_cleanup(function() {

            document.head.removeChild(style);

});

        assert_true(!!style.sheet, 'setup - sheet defined');

        assert_equals(

            style.sheet.cssRules.length, 1, 'setup - grouping rule created'

);

        assert_equals(

            style.sheet.cssRules[0].cssRules.length, 1, 'setup - rule created'

);

        return style.sheet.cssRules[0];

    test(function (t) {

        var groupingRule = create(t);

        var first = groupingRule.cssRules[0].cssText;

        var result;

        result = groupingRule.insertRule('.foo {}', 0);

        assert_equals(groupingRule.cssRules.length, 2);

        assert_not_equals(groupingRule.cssRules[0].cssText, first);

        assert_equals(groupingRule.cssRules[1].cssText, first);

        assert_equals(result, 0, 'result');

    }, 'index before first');

    test(function (t) {

        var groupingRule = create(t);

        var first = groupingRule.cssRules[0].cssText;

        var result;

        result = groupingRule.insertRule('.foo {}', 1);

        assert_equals(groupingRule.cssRules.length, 2);

        assert_equals(groupingRule.cssRules[0].cssText, first);

        assert_not_equals(groupingRule.cssRules[1].cssText, first);

        assert_equals(result, 1);

    }, 'index after final');

    test(function (t) {

        var groupingRule = create(t);

        var first = groupingRule.cssRules[0].cssText;

        var result;

        result = groupingRule.insertRule('.foo {}');

        assert_equals(groupingRule.cssRules.length, 2);

        assert_not_equals(groupingRule.cssRules[0].cssText, first);

        assert_equals(groupingRule.cssRules[1].cssText, first);

        assert_equals(result, 0);

    }, 'index not specified');

    test(function (t) {

        var groupingRule = create(t);

        var first = groupingRule.cssRules[0].cssText;

        assert_throws_dom('IndexSizeError', function() {

            // The syntax error is intentional; it verifies that the insertion

            // index is validated prior to the CSS text.

            groupingRule.insertRule('???', 2);

});

        assert_equals(groupingRule.cssRules.length, 1);

        assert_equals(groupingRule.cssRules[0].cssText, first);

    }, 'index exceeds length');

    test(function (t) {

        var groupingRule = create(t);

        var first = groupingRule.cssRules[0].cssText;

        assert_throws_dom('SyntaxError', function() {

            groupingRule.insertRule('???', 0);

});

        assert_equals(groupingRule.cssRules.length, 1);

        assert_equals(groupingRule.cssRules[0].cssText, first);

    }, 'CSS parsing error');

    test(function (t) {

        var groupingRule = create(t);

        var first = groupingRule.cssRules[0].cssText;

        assert_throws_dom('HierarchyRequestError', function() {

            groupingRule.insertRule('@import url("foo.css");', 0);

});

        assert_equals(groupingRule.cssRules.length, 1);

        assert_equals(groupingRule.cssRules[0].cssText, first);

    }, 'constraint violation');

    test(function (t) {

        var groupingRule = create(t);

        var first = groupingRule.cssRules[0].cssText;

        assert_throws_dom('HierarchyRequestError', function() {

            groupingRule.insertRule('@namespace url(http://www.w3.org/1999/xhtml);', 0);

});

        assert_equals(groupingRule.cssRules.length, 1);

        assert_equals(groupingRule.cssRules[0].cssText, first);

    }, 'disallowed namespace rule');

    </script>

</head>

</html>