MediaList.html - mozsearch

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

<!doctype html>

<html>

<head>

    <meta charset="utf-8">

    <title>CSSOM - MediaList interface</title>

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

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

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

    <style>

        @media screen and (min-width: 480px), print, projection {}

    </style>

    <script>

    test(function () {

        var media = document.styleSheets[0].cssRules[0].media;

        assert_equals(media.length, 3, "MediaList length attribute");

        assert_equals(media.mediaText, "screen and (min-width: 480px), print, projection", "MediaList mediaText attribute");

        assert_equals(media.toString(), "screen and (min-width: 480px), print, projection", "MediaList toString method");

        assert_equals(media[0], "screen and (min-width: 480px)", "MediaList indexed getter");

        assert_equals(media[1], "print", "MediaList indexed getter");

        assert_equals(media[2], "projection", "MediaList indexed getter");

        assert_equals(media[3], undefined, "MediaList indexed getter with out of range");

        assert_equals(media.item(0), "screen and (min-width: 480px)", "MediaList item method");

        assert_equals(media.item(3), null, "MediaList item method");

        media.deleteMedium("print");

        assert_equals(media.length, 2, "MediaList length attribute after delete method");

        assert_equals(media.mediaText, "screen and (min-width: 480px), projection", "MediaList mediaText attribute after delete method");

        assert_equals(media.toString(), "screen and (min-width: 480px), projection", "MediaList toString method after delete method");

        assert_equals(media[1], "projection", "MediaList indexed getter after delete method");

        assert_equals(media[2], undefined, "MediaList indexed getter with out of range after delete method");

        assert_equals(media.item(1), "projection", "MediaList indexed getter after delete method");

        assert_equals(media.item(2), null, "MediaList item method after delete method");

        media.appendMedium("speech");

        assert_equals(media.length, 3, "MediaList length attribute after append method");

        assert_equals(media.mediaText, "screen and (min-width: 480px), projection, speech", "MediaList mediaText attribute after append method");

        assert_equals(media.toString(), "screen and (min-width: 480px), projection, speech", "MediaList toString method after append method");

        assert_equals(media[1], "projection", "MediaList indexed getter after append method");

        assert_equals(media[2], "speech", "MediaList indexed getter after append method");

        assert_equals(media[3], undefined, "MediaList indexed getter with out of range after append method");

        assert_equals(media.item(2), "speech", "MediaList item method after append method");

        assert_equals(media.item(3), null, "MediaList item method after append method");

        media.mediaText = null;

        assert_equals(media.mediaText, "", "MediaList mediaText attribute should be empty string in case of null");

        assert_equals(media.toString(), "", "MediaList toString method should be empty string in case of null");

        var rule = document.styleSheets[0].cssRules[0];

        rule.media = "speech";

        assert_equals(rule.media.mediaText, "speech", "MediaList mediaText attribute should be updated");

});

    </script>

</head>

</html>