third_party/web_platform_tests/media-source/mediasource-getvideoplaybackquality.html

<!DOCTYPE html>
<html>
    <head>
        <title>HTMLVideoElement.getVideoPlaybackQuality() test cases.</title>
        <script src="/resources/testharness.js"></script>
        <script src="/resources/testharnessreport.js"></script>
        <script src="mediasource-util.js"></script>
    </head>
    <body>
        <div id="log"></div>
        <script>
          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              var previousQuality = mediaElement.getVideoPlaybackQuality();
              var timeUpdateCount = 0;
              mediaElement.addEventListener("timeupdate", test.step_func(function (e)
              {
                  var videoElement = e.target;
                  var newQuality = videoElement.getVideoPlaybackQuality();

                  assert_not_equals(previousQuality, newQuality, "Verify new object");
                  assert_greater_than(newQuality.creationTime, previousQuality.creationTime, "creationTime");

                  assert_greater_than_equal(newQuality.totalVideoFrames, 0, "totalVideoFrames >= 0");
                  assert_greater_than_equal(newQuality.totalVideoFrames, previousQuality.totalVideoFrames, "totalVideoFrames");

                  assert_greater_than_equal(newQuality.droppedVideoFrames, 0, "droppedVideoFrames >= 0");
                  assert_greater_than_equal(newQuality.droppedVideoFrames, previousQuality.droppedVideoFrames, "droppedVideoFrames");

                  assert_greater_than_equal(newQuality.corruptedVideoFrames, 0, "corruptedVideoFrames >= 0");
                  assert_greater_than_equal(newQuality.corruptedVideoFrames, previousQuality.corruptedVideoFrames, "corruptedVideoFrames");
                  previousQuality = newQuality;
                  timeUpdateCount++;
              }));

              mediaElement.addEventListener('error', test.unreached_func("Unexpected event 'error'"));

              test.expectEvent(sourceBuffer, 'updatestart', 'sourceBuffer');
              test.expectEvent(sourceBuffer, 'update', 'sourceBuffer');
              test.expectEvent(sourceBuffer, 'updateend', 'sourceBuffer');
              sourceBuffer.appendBuffer(mediaData);

              test.waitForExpectedEvents(function()
              {
                  assert_false(sourceBuffer.updating, "updating");
                  assert_greater_than(mediaSource.duration, 1, "duration");

                  mediaSource.duration = 1;

                  assert_true(sourceBuffer.updating, "updating");
                  test.expectEvent(sourceBuffer, 'updatestart', 'sourceBuffer');
                  test.expectEvent(sourceBuffer, 'update', 'sourceBuffer');
                  test.expectEvent(sourceBuffer, 'updateend', 'sourceBuffer');
              });

              test.waitForExpectedEvents(function()
              {
                  mediaSource.endOfStream();
                  mediaElement.play();
                  test.expectEvent(mediaElement, 'ended', 'mediaElement');
              });

              test.waitForExpectedEvents(function()
              {
                  assert_greater_than(timeUpdateCount, 2, "timeUpdateCount");
                  test.done();
              });
          }, "Test HTMLVideoElement.getVideoPlaybackQuality() with MediaSource API");
        </script>
    </body>
</html>