src/third_party/web_platform_tests/media-source/SourceBuffer-abort-updating.html

<!doctype html>
<html>
<head>
  <meta charset='utf-8'>
  <title>Check SourceBuffer#abort() when the updating attribute is true</title>
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id="log"></div>

<script>
var contents = {'/media/white.webm': 'video/webm; codecs="vorbis,vp8"',
                '/media/white.mp4' : 'video/mp4'};

function GET(url, processBody) {
    var xhr = new XMLHttpRequest();
    xhr.open('GET', url, true);
    xhr.responseType = 'arraybuffer';
    xhr.send();
    xhr.onload = function(e) {
        if (xhr.status != 200) {
            alert("Unexpected status code " + xhr.status + " for " + url);
            return false;
        }
        processBody(new Uint8Array(xhr.response));
    };
}
//check the browser supports the MIME used in this test
function isTypeSupported(mime) {
    if(!MediaSource.isTypeSupported(mime)) {
        this.step(function() {
            assert_unreached("Browser doesn't support the MIME used in this test: " + mime);
        });
        this.done();
        return false;
    }
    return true;
}
function mediaTest(file, mime) {
    async_test(function(t) {
        if(!isTypeSupported.bind(t)(mime)) {
            return;
        }
        GET(file, function(data) {
            var mediaSource = new MediaSource();
            var num_updateend = 0;
            var events = [];
            mediaSource.addEventListener('sourceopen', t.step_func(function(e) {
                var sourceBuffer = mediaSource.addSourceBuffer(mime);
                assert_equals(sourceBuffer.updating, false);
                sourceBuffer.addEventListener('updatestart', t.step_func(function(e) {
                    events.push('updatestart');
                    //abort when sourceBuffer#updating is true
                    sourceBuffer.abort();

                    assert_equals(sourceBuffer.updating, false,
                                  'Check updating value after calling abort.');
                    assert_equals(sourceBuffer.appendWindowStart, 0);
                    assert_equals(sourceBuffer.appendWindowEnd, Number.POSITIVE_INFINITY);
                }));
                sourceBuffer.addEventListener('update', t.step_func(function(e) {
                    assert_unreached("Can't touch this");
                }));
                sourceBuffer.addEventListener('updateend', function(e) {
                    events.push('updateend');
                    mediaSource.endOfStream();
                });
                sourceBuffer.addEventListener('abort', function(e) {
                    events.push('abort');
                });
                sourceBuffer.addEventListener('error', t.step_func(function(e) {
                    assert_unreached("Can't touch this");
                }));
                sourceBuffer.appendBuffer(data);
            }));
            mediaSource.addEventListener('sourceended', t.step_func_done(function(e) {
                assert_array_equals(events,
                                    ['updatestart', 'abort', 'updateend'],
                                    'Check the sequence of fired events.');
            }));
            var video = document.createElement('video');
            video.src = window.URL.createObjectURL(mediaSource);
        });
    }, 'SourceBuffer#abort() (' + mime + ') : Check the algorithm when the updating attribute is true.');
}
for(var file in contents) {
    mediaTest(file, contents[file]);
}
</script>
</body>
</html>