media-source/mediasource-trackdefault.html

<!DOCTYPE html>
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<meta charset="utf-8">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
    function checkConstructionSucceeds(type, language, label, kinds, byteStreamTrackID)
    {
        var trackDefault = new TrackDefault(type, language, label, kinds, byteStreamTrackID);
        assert_equals(trackDefault.type, type, "type");
        assert_equals(trackDefault.language, language, "language");
        assert_equals(trackDefault.label, label, "label");
        assert_equals(trackDefault.byteStreamTrackID, byteStreamTrackID, "byteStreamTrackID");
        assert_array_equals(trackDefault.kinds, kinds, "kinds");
    }

    function checkConstructionFails(type, language, label, kinds, byteStreamTrackID)
    {
        assert_throws_js(TypeError,
            function() { new TrackDefault(type, language, label, kinds, byteStreamTrackID); },
            "TrackDefault construction threw an exception");
    }

    function trackDefaultConstructionTest(type, language, label, kinds, byteStreamTrackID, expectation, description)
    {
        test(function()
        {
            if (expectation)
                checkConstructionSucceeds(type, language, label, kinds, byteStreamTrackID);
            else
                checkConstructionFails(type, language, label, kinds, byteStreamTrackID);
        }, description + ": type '" + type + "', language '" + language + "', label '" + label + "', multiple kinds, byteStreamTrackID '" + byteStreamTrackID + "'");

        // If all of |kinds| are expected to succeed, also test each kind individually.
        if (!expectation || kinds.length <= 1)
            return;
        for (var i = 0; i < kinds.length; ++i) {
            test(function()
            {
                checkConstructionSucceeds(type, language, label, new Array(kinds[i]), byteStreamTrackID);
            }, description + ": type '" + type + "', language '" + language + "', label '" + label + "', kind '" + kinds[i] + "', byteStreamTrackID '" + byteStreamTrackID + "'");
        }
    }

    var VALID_AUDIO_TRACK_KINDS = [
        "alternative",
        "descriptions",
        "main",
        "main-desc",
        "translation",
        "commentary",
        "",
    ];

    var VALID_VIDEO_TRACK_KINDS = [
        "alternative",
        "captions",
        "main",
        "sign",
        "subtitles",
        "commentary",
        "",
    ];

    var VALID_TEXT_TRACK_KINDS = [
        "subtitles",
        "captions",
        "descriptions",
        "chapters",
        "metadata",
    ];

    trackDefaultConstructionTest("audio", "en-US", "audio label", VALID_AUDIO_TRACK_KINDS, "1", true, "Test valid audio kinds");

    trackDefaultConstructionTest("video", "en-US", "video label", VALID_VIDEO_TRACK_KINDS, "1", true, "Test valid video kinds");

    trackDefaultConstructionTest("text", "en-US", "text label", VALID_TEXT_TRACK_KINDS, "1", true, "Test valid text kinds");

    trackDefaultConstructionTest("audio", "en-US", "audio label", VALID_VIDEO_TRACK_KINDS, "1", false, "Test mixed valid and invalid audio kinds");

    trackDefaultConstructionTest("video", "en-US", "video label", VALID_AUDIO_TRACK_KINDS, "1", false, "Test mixed valid and invalid video kinds");

    trackDefaultConstructionTest("text", "en-US", "text label", VALID_VIDEO_TRACK_KINDS, "1", false, "Test mixed valid and invalid text kinds");

    trackDefaultConstructionTest("invalid type", "en-US", "label", VALID_AUDIO_TRACK_KINDS, "1", false, "Test invalid 'type' parameter type passed to TrackDefault constructor");

    test(function()
    {
        checkConstructionFails("audio", "en-US", "label", "this is not a valid sequence", "1");
    }, "Test invalid 'kinds' parameter type passed to TrackDefault constructor");

    test(function()
    {
        var trackDefault = new TrackDefault("audio", "en-US", "label", VALID_AUDIO_TRACK_KINDS, "1");
        var kinds = trackDefault.kinds;
        kinds[0] = "invalid kind";
        assert_equals(kinds[0], "invalid kind", "local kinds is updated");
        assert_equals(VALID_AUDIO_TRACK_KINDS[0], "alternative", "local original kinds unchanged");
        assert_array_equals(trackDefault.kinds, VALID_AUDIO_TRACK_KINDS, "trackDefault kinds unchanged");
    }, "Test updating the retval of TrackDefault.kinds does not modify TrackDefault.kinds");
</script>