parse-anplusb.html

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This WPT test may be referenced by the following Test IDs:
- /css/selectors/parsing/parse-anplusb.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

    <head>

        <title>CSS Selectors: Test parsing of an+b selectors</title>

        <link rel="author" title="Chris Nardi" href="mailto:cnardi@chromium.org">

        <link rel="help" href="https://drafts.csswg.org/selectors-3/#nth-child-pseudo">

        <link rel="help" href="https://drafts.csswg.org/selectors-3/#nth-last-child-pseudo">

        <link rel="help" href="https://drafts.csswg.org/selectors-3/#nth-of-type-pseudo">

        <link rel="help" href="https://drafts.csswg.org/selectors-3/#nth-last-of-type-pseudo">

        <meta charset="utf-8">

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

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

        <style id="teststyles">

        </style>

    </head>

    <body>

        <script>

            function add_selector_style(source) {

                var style_element = document.getElementById("teststyles");

                style_element.firstChild.data = source + "{ font-size: 1em; }";

                return style_element.sheet;

            function assert_selector_serializes_to(source, expected_result) {

                test(function() {

                    var sheet = add_selector_style(source);

                    assert_equals(sheet.cssRules[0].selectorText, expected_result);

                }, source + " should be parsed and serialized correctly");

            function assert_invalid_selector(source) {

                test(function() {

                    var sheet = add_selector_style(source);

                    assert_equals(sheet.cssRules[0], undefined);

                }, source + " should not parse");

            function run_tests_on_anplusb_selector(source) {

                assert_selector_serializes_to(source + '(1n+0)', source + '(n)');

                assert_selector_serializes_to(source + '(n+0)', source + '(n)');

                assert_selector_serializes_to(source + '(n)', source + '(n)');

                assert_selector_serializes_to(source + '(-n+0)', source + '(-n)');

                assert_selector_serializes_to(source + '(-n)', source + '(-n)');

                assert_selector_serializes_to(source + '(N)', source + '(n)');

                assert_selector_serializes_to(source + '(+n+3)', source + '(n+3)');

                assert_selector_serializes_to(source + '( +n + 7 )', source + '(n+7)');

                assert_selector_serializes_to(source + '(  N- 123)', source + '(n-123)');

                assert_selector_serializes_to(source + '(n- 10)', source + '(n-10)');

                assert_selector_serializes_to(source + '(-n\n- 1)', source + '(-n-1)');

                assert_selector_serializes_to(source + '( 23n\n\n+\n\n123 )', source + '(23n+123)');

                assert_invalid_selector(source + '(n- 1 2)');

                assert_invalid_selector(source + '(n-b1)');

                assert_invalid_selector(source + '(n-+1)');

                assert_invalid_selector(source + '(n-1n)');

                assert_invalid_selector(source + '(-n -b1)');

                assert_invalid_selector(source + '(-1n- b1)');

                assert_invalid_selector(source + '(-n-13b1)');

                assert_invalid_selector(source + '(-n-+1)');

                assert_invalid_selector(source + '(-n+n)');

                assert_invalid_selector(source + '(+ 1n)');

                assert_invalid_selector(source + '(  n +12 3)');

                assert_invalid_selector(source + '(  12 n )');

                assert_invalid_selector(source + '(+12n-0+1)');

                assert_invalid_selector(source + '(+12N -- 1)');

                assert_invalid_selector(source + '(+12 N )');

                assert_invalid_selector(source + '(+ n + 7)');

            run_tests_on_anplusb_selector(':nth-child');

            run_tests_on_anplusb_selector(':nth-last-child');

            run_tests_on_anplusb_selector(':nth-of-type');

            run_tests_on_anplusb_selector(':nth-last-of-type');

        </script>

    </body>

</html>