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

<!DOCTYPE html>
<html>
    <head>
        <title>MediaSource.duration &amp; HTMLMediaElement.duration 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>
          function mediasource_truncated_duration_seek_test(testFunction, description, options)
          {
              return mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
              {
                  assert_greater_than(segmentInfo.duration, 2, 'Sufficient test media duration');

                  var fullDuration = segmentInfo.duration;
                  var seekTo = fullDuration / 2.0;
                  var truncatedDuration = seekTo / 2.0;

                  mediaElement.play();

                  // Append all the segments
                  test.expectEvent(sourceBuffer, 'updateend', 'sourceBuffer');
                  test.expectEvent(mediaElement, 'playing', 'Playing triggered');
                  sourceBuffer.appendBuffer(mediaData);

                  test.waitForExpectedEvents(function()
                  {
                      assert_equals(mediaElement.duration, fullDuration, 'mediaElement fullDuration');
                      assert_equals(mediaSource.duration, fullDuration, 'mediaSource fullDuration');

                      test.expectEvent(mediaElement, 'seeking', 'seeking to seekTo');
                      test.expectEvent(mediaElement, 'timeupdate', 'timeupdate while seeking to seekTo');
                      test.expectEvent(mediaElement, 'seeked', 'seeked to seekTo');
                      mediaElement.currentTime = seekTo;
                      assert_true(mediaElement.seeking, 'mediaElement.seeking (to seekTo)');
                  });

                  test.waitForExpectedEvents(function()
                  {
                      assert_greater_than_equal(mediaElement.currentTime, seekTo, 'Playback time has reached seekTo');
                      assert_equals(mediaElement.duration, fullDuration, 'mediaElement fullDuration after seekTo');
                      assert_equals(mediaSource.duration, fullDuration, 'mediaSource fullDuration after seekTo');
                      assert_false(mediaElement.seeking, 'mediaElement.seeking after seeked to seekTo');

                      test.expectEvent(mediaElement, 'seeking', 'Seeking to truncated duration');

                      assert_false(sourceBuffer.updating, 'sourceBuffer.updating');

                      mediaSource.duration = truncatedDuration;

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

                      assert_true(mediaElement.seeking, 'Seeking after setting truncatedDuration');
                  });

                  test.waitForExpectedEvents(function()
                  {
                      assert_equals(mediaElement.currentTime, truncatedDuration,
                                    'Playback time is truncatedDuration while seeking');
                      assert_true(mediaElement.seeking, 'mediaElement.seeking while seeking to truncatedDuration');
                      assert_equals(mediaElement.duration, truncatedDuration,
                                    'mediaElement truncatedDuration during seek to it');
                      assert_equals(mediaSource.duration, truncatedDuration,
                                    'mediaSource truncatedDuration during seek to it');

                      testFunction(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData,
                                   truncatedDuration);
                  });
              }, description, options);
          }

          mediasource_truncated_duration_seek_test(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer,
                                                            mediaData, truncatedDuration)
          {
              // Tests that duration truncation below current playback position
              // starts seek to new duration.
              test.done();
          }, 'Test seek starts on duration truncation below currentTime');

          mediasource_truncated_duration_seek_test(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer,
                                                            mediaData, truncatedDuration)
          {
              // The duration has been truncated at this point, and there is an
              // outstanding seek pending.
              test.expectEvent(sourceBuffer, 'updateend', 'updateend after appending more data');

              test.expectEvent(mediaElement, 'timeupdate', 'timeupdate while finishing seek to truncatedDuration');
              test.expectEvent(mediaElement, 'seeked', 'seeked to truncatedDuration');

              // Allow seek to complete by appending more data beginning at the
              // truncated duration timestamp.
              sourceBuffer.timestampOffset = truncatedDuration;
              sourceBuffer.appendBuffer(mediaData);

              test.waitForExpectedEvents(function()
              {
                  assert_greater_than_equal(mediaElement.currentTime, truncatedDuration,
                                            'Playback time has reached truncatedDuration');
                  assert_approx_equals(mediaElement.duration, truncatedDuration + segmentInfo.duration, 0.05,
                                       'mediaElement duration increased by new append');
                  assert_equals(mediaSource.duration, mediaElement.duration,
                                'mediaSource duration increased by new append');
                  assert_false(mediaElement.seeking, 'mediaElement.seeking after seeked to truncatedDuration');

                  test.done();
              });
          }, 'Test appendBuffer completes previous seek to truncated duration');

          mediasource_truncated_duration_seek_test(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer,
                                                            mediaData, truncatedDuration)
          {
              // The duration has been truncated at this point, and there is an
              // outstanding seek pending.
              test.expectEvent(mediaSource, 'sourceended', 'endOfStream acknowledged');

              test.expectEvent(mediaElement, 'timeupdate', 'timeupdate while finishing seek to truncatedDuration');
              test.expectEvent(mediaElement, 'seeked', 'seeked to truncatedDuration');

              // Call endOfStream() to complete the pending seek.
              mediaSource.endOfStream();

              test.waitForExpectedEvents(function()
              {
                  assert_equals(mediaElement.currentTime, truncatedDuration,
                                'Playback time has reached truncatedDuration');
                  assert_equals(mediaElement.duration, truncatedDuration,
                                'mediaElement truncatedDuration after seek to it');
                  assert_equals(mediaSource.duration, truncatedDuration,
                                'mediaSource truncatedDuration after seek to it');
                  assert_false(mediaElement.seeking, 'mediaElement.seeking after seeked to truncatedDuration');

                  test.done();
              });
          }, 'Test endOfStream completes previous seek to truncated duration');

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              assert_greater_than(segmentInfo.duration, 2, 'Sufficient test media duration');

              var fullDuration = segmentInfo.duration;
              var newDuration = 0.5;

              var expectedDurationChangeEventCount = 1;
              var durationchangeEventCounter = 0;
              var durationchangeEventHandler = test.step_func(function(event)
              {
                  assert_equals(mediaElement.duration, newDuration, 'mediaElement newDuration');
                  assert_equals(mediaSource.duration, newDuration, 'mediaSource newDuration');
                  durationchangeEventCounter++;
              });

              mediaElement.play();

              // Append all the segments
              test.expectEvent(sourceBuffer, 'updateend', 'sourceBuffer');
              test.expectEvent(mediaElement, 'playing', 'Playing triggered');
              sourceBuffer.appendBuffer(mediaData);

              test.waitForExpectedEvents(function()
              {
                  assert_equals(mediaElement.duration, fullDuration, 'mediaElement fullDuration');
                  assert_equals(mediaSource.duration, fullDuration, 'mediaSource fullDuration');
                  assert_less_than(mediaElement.currentTime, newDuration / 2, 'mediaElement currentTime');

                  // Media load also fires 'durationchange' event, so only start counting them now.
                  mediaElement.addEventListener('durationchange', durationchangeEventHandler);

                  assert_false(sourceBuffer.updating, "updating");

                  // Truncate duration. This should result in one 'durationchange' fired.
                  mediaSource.duration = newDuration;

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

              test.waitForExpectedEvents(function()
              {
                  assert_false(sourceBuffer.updating, "updating");

                  // Set duration again to make sure it does not trigger another 'durationchange' event.
                  mediaSource.duration = newDuration;

                  // Mark endOfStream so that playback can reach 'ended' at the new duration.
                  test.expectEvent(mediaSource, 'sourceended', 'endOfStream acknowledged');
                  mediaSource.endOfStream();

                  // endOfStream can change duration downwards slightly.
                  // Allow for one more 'durationchange' event only in this case.
                  var currentDuration = mediaSource.duration;
                  if (currentDuration != newDuration) {
                      assert_true(currentDuration > 0 && currentDuration < newDuration, 'adjusted duration');
                      newDuration = currentDuration;
                      ++expectedDurationChangeEventCount;
                  }

                  // Allow media to play to end while counting 'durationchange' events.
                  test.expectEvent(mediaElement, 'ended', 'Playback ended');
                  test.waitForExpectedEvents(function()
                  {
                      mediaElement.removeEventListener('durationchange', durationchangeEventHandler);
                      assert_equals(durationchangeEventCounter, expectedDurationChangeEventCount, 'durationchanges');
                      test.done();
                  });
              });
          }, 'Test setting same duration multiple times does not fire duplicate durationchange');
        </script>
    </body>
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