media-source/mediasource-addsourcebuffer-mode.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>Checks MediaSource.addSourceBuffer() sets SourceBuffer.mode appropriately</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="mediasource-util.js"></script>
<script>
    mediasource_test(function(test, mediaElement, mediaSource)
    {
        // Note all mime types in mediasource-util.js
        // set the "generate timestamps flag" to false
        var mime = MediaSourceUtil.VIDEO_ONLY_TYPE;
        var sourceBuffer = mediaSource.addSourceBuffer(mime);
        assert_equals(sourceBuffer.mode, "segments");
        test.done();
    }, "addSourceBuffer() sets SourceBuffer.mode to 'segments' when the generate timestamps flag is false");

    mediasource_test(function(test, mediaElement, mediaSource)
    {
        var mime = 'audio/aac';
        if (!MediaSource.isTypeSupported(mime)) {
            mime = 'audio/mpeg';
            if (!MediaSource.isTypeSupported(mime)) {
                assert_unreached("Browser does not support the audio/aac and audio/mpeg MIME types used in this test");
            }
        }
        sourceBuffer = mediaSource.addSourceBuffer(mime);
        assert_equals(sourceBuffer.mode, "sequence");
        test.done();
    }, "addSourceBuffer() sets SourceBuffer.mode to 'sequence' when the generate timestamps flag is true");
</script>