<!DOCTYPE html>
<html>
    <head>
        <script src="/w3c/resources/testharness.js"></script>
        <script src="/w3c/resources/testharnessreport.js"></script>
        <script src="mediasource-util.js"></script>
    </head>
    <body>
        <script>
            function loadMediaAndVerifyAddedTracks(test, mediaElement, segmentInfo, sourceBuffer, mediaData, successCallback)
            {
                var initSegment = MediaSourceUtil.extractSegmentData(mediaData, segmentInfo.init);
                test.expectEvent(sourceBuffer.audioTracks, "addtrack", "sourceBuffer.audioTracks addtrack event");
                test.expectEvent(sourceBuffer.videoTracks, "addtrack", "sourceBuffer.videoTracks addtrack event");
                test.expectEvent(mediaElement.audioTracks, "addtrack", "mediaElement.audioTracks addtrack event");
                test.expectEvent(mediaElement.videoTracks, "addtrack", "mediaElement.videoTracks addtrack event");
                test.expectEvent(mediaElement, "loadedmetadata", "loadedmetadata done.");
                test.expectEvent(sourceBuffer, "updateend", "initSegment append ended.");
                sourceBuffer.appendBuffer(initSegment);
                test.waitForExpectedEvents(function()
                {
                    assert_equals(sourceBuffer.videoTracks.length, 1, "videoTracks.length");
                    assert_equals(sourceBuffer.videoTracks[0].kind, "main", "videoTrack.kind");
                    assert_equals(sourceBuffer.videoTracks[0].label, "", "videoTrack.label");
                    assert_equals(sourceBuffer.videoTracks[0].language, "", "videoTrack.language");
                    assert_equals(sourceBuffer.videoTracks[0].sourceBuffer, sourceBuffer, "videoTrack.sourceBuffer");
                    // The first video track is selected by default.
                    assert_true(sourceBuffer.videoTracks[0].selected, "sourceBuffer.videoTracks[0].selected");

                    assert_equals(sourceBuffer.audioTracks.length, 1, "audioTracks.length");
                    assert_equals(sourceBuffer.audioTracks[0].kind, "main", "audioTrack.kind");
                    assert_equals(sourceBuffer.audioTracks[0].label, "", "audioTrack.label");
                    assert_equals(sourceBuffer.audioTracks[0].language, "", "audioTrack.language");
                    assert_equals(sourceBuffer.audioTracks[0].sourceBuffer, sourceBuffer, "audioTrack.sourceBuffer");
                    // The first audio track is enabled by default.
                    assert_true(sourceBuffer.audioTracks[0].enabled, "sourceBuffer.audioTracks[0].enabled");

                    assert_not_equals(sourceBuffer.audioTracks[0].id, sourceBuffer.videoTracks[0].id, "track ids must be unique");

                    assert_equals(mediaElement.videoTracks.length, 1, "videoTracks.length");
                    assert_equals(mediaElement.videoTracks[0], sourceBuffer.videoTracks[0], "mediaElement.videoTrack == sourceBuffer.videoTrack");

                    assert_equals(mediaElement.audioTracks.length, 1, "audioTracks.length");
                    assert_equals(mediaElement.audioTracks[0], sourceBuffer.audioTracks[0], "mediaElement.audioTrack == sourceBuffer.audioTrack");

                    successCallback();
                });
            }

            mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
            {
                loadMediaAndVerifyAddedTracks(test, mediaElement, segmentInfo, sourceBuffer, mediaData, test.step_func_done());
            }, "Check that media tracks and their properties are populated properly");

            function verifyTrackRemoval(test, mediaElement, mediaSource, sourceBuffer, trackRemovalAction, successCallback) {
                assert_equals(sourceBuffer.audioTracks.length, 1, "audioTracks.length");
                assert_true(sourceBuffer.audioTracks[0].enabled, "sourceBuffer.audioTracks[0].enabled");
                assert_equals(sourceBuffer.videoTracks.length, 1, "videoTracks.length");
                assert_true(sourceBuffer.videoTracks[0].selected, "sourceBuffer.videoTracks[0].selected");

                var audioTrack = sourceBuffer.audioTracks[0];
                var videoTrack = sourceBuffer.videoTracks[0];

                // Verify removetrack events.
                test.expectEvent(sourceBuffer.audioTracks, "removetrack", "sourceBuffer.audioTracks removetrack event");
                test.expectEvent(sourceBuffer.videoTracks, "removetrack", "sourceBuffer.videoTracks removetrack event");
                test.expectEvent(mediaElement.audioTracks, "removetrack", "mediaElement.audioTracks removetrack event");
                test.expectEvent(mediaElement.videoTracks, "removetrack", "mediaElement.videoTracks removetrack event");

                // Removing enabled audio track and selected video track should fire "change" events on mediaElement track lists.
                test.expectEvent(mediaElement.audioTracks, "change", "mediaElement.audioTracks changed.");
                test.expectEvent(mediaElement.videoTracks, "change", "mediaElement.videoTracks changed.");

                trackRemovalAction();

                test.waitForExpectedEvents(function()
                {
                    assert_equals(mediaSource.sourceBuffers.length, 0, "mediaSource.sourceBuffers.length");
                    assert_equals(mediaElement.videoTracks.length, 0, "videoTracks.length");
                    assert_equals(mediaElement.audioTracks.length, 0, "audioTracks.length");
                    assert_equals(sourceBuffer.videoTracks.length, 0, "videoTracks.length");
                    assert_equals(sourceBuffer.audioTracks.length, 0, "audioTracks.length");
                    // Since audio and video tracks have been removed, their .sourceBuffer property should be null now.
                    assert_equals(audioTrack.sourceBuffer, null, "audioTrack.sourceBuffer");
                    assert_equals(videoTrack.sourceBuffer, null, "videoTrack.sourceBuffer");
                    successCallback();
                });
            }

            mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
            {
                loadMediaAndVerifyAddedTracks(test, mediaElement, segmentInfo, sourceBuffer, mediaData, test.step_func(function ()
                {
                    verifyTrackRemoval(test, mediaElement, mediaSource, sourceBuffer, test.step_func(function ()
                    {
                        mediaSource.removeSourceBuffer(sourceBuffer);
                    }), test.step_func_done());
                }));
            }, "Media tracks must be removed when the SourceBuffer is removed from the MediaSource");

            mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
            {
                loadMediaAndVerifyAddedTracks(test, mediaElement, segmentInfo, sourceBuffer, mediaData, test.step_func(function ()
                {
                    verifyTrackRemoval(test, mediaElement, mediaSource, sourceBuffer, test.step_func(function ()
                    {
                        // Change src to a valid, different, URL to ensure
                        // there is no unintended error produced which might
                        // race an otherwise-successful test's completion.
                        var secondMediaSource = new MediaSource();
                        mediaElement.src = URL.createObjectURL(secondMediaSource);
                    }), test.step_func_done());
                }));
            }, "Media tracks must be removed when the HTMLMediaElement.src is changed");

            mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
            {
                loadMediaAndVerifyAddedTracks(test, mediaElement, segmentInfo, sourceBuffer, mediaData, test.step_func(function ()
                {
                    assert_equals(mediaSource.activeSourceBuffers.length, 1, "mediaSource.activeSourceBuffers.length == 1");
                    assert_equals(mediaSource.activeSourceBuffers[0], sourceBuffer, "mediaSource.activeSourceBuffers[0]");
                    assert_equals(sourceBuffer.videoTracks.selectedIndex, 0, "sourceBuffer.videoTracks.selectedIndex");
                    test.expectEvent(mediaElement.audioTracks, "change", "mediaElement.audioTracks changed.");
                    test.expectEvent(mediaElement.videoTracks, "change", "mediaElement.videoTracks changed.");
                    test.expectEvent(sourceBuffer.audioTracks, "change", "mediaElement.audioTracks changed.");
                    test.expectEvent(sourceBuffer.videoTracks, "change", "mediaElement.videoTracks changed.");
                    test.expectEvent(mediaSource.activeSourceBuffers, "removesourcebuffer", "mediaSource.activeSourceBuffers.onchange");
                    mediaElement.audioTracks[0].enabled = false;
                    mediaElement.videoTracks[0].selected = false;
                    test.waitForExpectedEvents(test.step_func(function()
                    {
                        assert_equals(mediaSource.activeSourceBuffers.length, 0, "mediaSource.activeSourceBuffers.length == 0");
                        assert_equals(sourceBuffer.videoTracks.selectedIndex, -1, "sourceBuffer.videoTracks.selectedIndex");
                        test.expectEvent(mediaElement.audioTracks, "change", "mediaElement.audioTracks changed.");
                        test.expectEvent(mediaElement.videoTracks, "change", "mediaElement.videoTracks changed.");
                        test.expectEvent(sourceBuffer.audioTracks, "change", "sourceBuffer.audioTracks changed.");
                        test.expectEvent(sourceBuffer.videoTracks, "change", "sourceBuffer.videoTracks changed.");
                        mediaElement.audioTracks[0].enabled = true;
                        mediaElement.videoTracks[0].selected = true;
                        test.expectEvent(mediaSource.activeSourceBuffers, "addsourcebuffer", "mediaSource.activeSourceBuffers.onchange");
                        test.waitForExpectedEvents(test.step_func_done());
                    }));
                }));
            }, "Change events must be fired on MediaElement and SourceBuffer track lists when enabling/disabling or selecting/deselecting tracks");

        </script>
    </body>
</html>