media-source/mediasource-sourcebuffer-mode.html

<!DOCTYPE html>
<!-- Copyright © 2016 Chromium authors and World Wide Web Consortium, (Massachusetts Institute of Technology, ERCIM, Keio University, Beihang). -->
<html>
    <head>
        <meta charset="utf-8">
        <title>SourceBuffer.mode 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)
          {
              assert_equals(sourceBuffer.mode, 'segments', 'default append mode should be \'segments\'');
              test.done();
          }, 'Test initial value of SourceBuffer.mode is "segments"');

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              sourceBuffer.mode = 'sequence';
              assert_equals(sourceBuffer.mode, 'sequence', 'mode after setting it to \'sequence\'');

              // Setting a mode that is not in AppendMode IDL enum should be ignored and not cause exception.
              sourceBuffer.mode = 'invalidmode';
              sourceBuffer.mode = null;
              sourceBuffer.mode = '';
              sourceBuffer.mode = 'Segments';
              assert_equals(sourceBuffer.mode, 'sequence', 'mode unchanged by attempts to set invalid modes');

              sourceBuffer.mode = 'segments';
              assert_equals(sourceBuffer.mode, 'segments', 'mode after setting it to \'segments\'');
              test.done();
          }, 'Test setting SourceBuffer.mode');

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              mediaSource.removeSourceBuffer(sourceBuffer);
              assert_throws('InvalidStateError',
                  function() { sourceBuffer.mode = 'segments'; },
                  'Setting valid sourceBuffer.mode on removed SourceBuffer should throw InvalidStateError.');
              test.done();
          }, 'Test setting a removed SourceBuffer\'s mode');

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              sourceBuffer.appendBuffer(mediaData);
              assert_true(sourceBuffer.updating, 'updating attribute is true');
              assert_throws('InvalidStateError',
                  function() { sourceBuffer.mode = 'segments'; },
                  'Setting valid sourceBuffer.mode on updating SourceBuffer threw InvalidStateError.');
              test.done();
          }, 'Test setting SourceBuffer.mode while still updating');

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              test.expectEvent(sourceBuffer, 'updateend', 'Append ended.');
              sourceBuffer.appendBuffer(mediaData);

              test.waitForExpectedEvents(function()
              {
                  assert_false(sourceBuffer.updating, 'updating attribute is false');

                  test.expectEvent(mediaSource, 'sourceended', 'MediaSource sourceended event');
                  mediaSource.endOfStream();
                  assert_equals(mediaSource.readyState, 'ended', 'MediaSource readyState is \'ended\'');
              });

              test.waitForExpectedEvents(function()
              {
                  assert_equals(mediaSource.readyState, 'ended', 'MediaSource readyState is \'ended\'');

                  test.expectEvent(mediaSource, 'sourceopen', 'MediaSource sourceopen event');
                  sourceBuffer.mode = 'segments';

                  assert_equals(mediaSource.readyState, 'open', 'MediaSource readyState is \'open\'');
              });

              test.waitForExpectedEvents(function()
              {
                  assert_equals(mediaSource.readyState, 'open', 'MediaSource readyState is \'open\'');
                  test.done();
              });
          }, 'Test setting SourceBuffer.mode triggers parent MediaSource \'ended\' to \'open\' transition.');

          mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
          {
              var initSegment = MediaSourceUtil.extractSegmentData(mediaData, segmentInfo.init);
              var fullMediaSegment = MediaSourceUtil.extractSegmentData(mediaData, segmentInfo.media[0]);
              var truncateAt = Math.floor(segmentInfo.media[0].size * 0.5);  // Pick first 50% of segment bytes.
              var partialMediaSegment = fullMediaSegment.subarray(0, truncateAt);
              var mediaSegmentRemainder = fullMediaSegment.subarray(truncateAt);

              // Append init segment.
              test.expectEvent(sourceBuffer, 'updateend', 'Init segment append ended.');
              sourceBuffer.appendBuffer(initSegment);

              test.waitForExpectedEvents(function()
              {
                  assert_false(sourceBuffer.updating, 'updating attribute is false');
                  assert_equals(sourceBuffer.mode, 'segments');
                  sourceBuffer.mode = 'segments';  // No exception should occur.
                  assert_equals(sourceBuffer.timestampOffset, 0.0);
                  sourceBuffer.timestampOffset = 10.123456789;  // No exception should occur.
                  assert_equals(sourceBuffer.timestampOffset, 10.123456789);  // Super-precise offsets should round-trip.

                  // Append first part of media segment.
                  test.expectEvent(sourceBuffer, 'updateend', 'Partial media segment append ended.');
                  sourceBuffer.appendBuffer(partialMediaSegment);
              });

              test.waitForExpectedEvents(function()
              {
                  assert_false(sourceBuffer.updating, 'updating attribute is false');
                  assert_equals(sourceBuffer.mode, 'segments');
                  assert_throws('InvalidStateError',
                      function() { sourceBuffer.mode = 'segments'; },
                      'Setting valid sourceBuffer.mode while still parsing media segment threw InvalidStateError.');
                  assert_equals(sourceBuffer.timestampOffset, 10.123456789);
                  assert_throws('InvalidStateError',
                      function() { sourceBuffer.timestampOffset = 20.0; },
                      'Setting valid sourceBuffer.timestampOffset while still parsing media segment threw InvalidStateError.');

                  // Append remainder of media segment.
                  test.expectEvent(sourceBuffer, 'updateend', 'Append ended of remainder of media segment.');
                  sourceBuffer.appendBuffer(mediaSegmentRemainder);
              });

              test.waitForExpectedEvents(function()
              {
                  assert_false(sourceBuffer.updating, 'updating attribute is false');
                  assert_equals(sourceBuffer.mode, 'segments');
                  sourceBuffer.mode = 'segments';  // No exception should occur.
                  assert_equals(sourceBuffer.timestampOffset, 10.123456789);
                  sourceBuffer.timestampOffset = 20.0;  // No exception should occur.
                  test.done();
              });
          }, 'Test setting SourceBuffer.mode and SourceBuffer.timestampOffset while parsing media segment.');
        </script>
    </body>
</html>