third_party/WebKit/LayoutTests/http/tests/media/media-source/mediasource-redundant-seek.html

   1 <!DOCTYPE html>
   2 <html>
   3     <head>
   4         <script src="/w3c/resources/testharness.js"></script>
   5         <script src="/w3c/resources/testharnessreport.js"></script>
   6         <script src="mediasource-util.js"></script>
   7         <link rel="stylesheet" href="/w3c/resources/testharness.css">
   8     </head>
   9     <body>
  10         <div id="log"></div>
  11         <script>
  12
  13             mediasource_testafterdataloaded(function(test, mediaElement, mediaSource, segmentInfo, sourceBuffer, mediaData)
  14             {
  15                 mediaElement.play();
  16
  17                 // Append all media data for complete playback.
  18                 test.expectEvent(sourceBuffer, 'updateend', 'sourceBuffer end update.');
  19                 test.expectEvent(mediaElement, 'loadedmetadata', 'Reached HAVE_METADATA');
  20                 test.expectEvent(mediaElement, 'playing', 'Playing media.');
  21                 sourceBuffer.appendBuffer(mediaData);
  22
  23                 test.waitForExpectedEvents(function()
  24                 {
  25                     var bufferedRanges = mediaElement.buffered;
  26
  27                     // TODO: Add coverage by varying which of the two seek times have buffered data, including neither, and by
  28                     // varying seek redundancy, like 1+1, 1+3+3+1, 3+1+1, 3+3+1, or large number of 1+3+1+3+...
  29                     assert_greater_than_equal(mediaElement.duration, 4.0, 'Duration is >= 4.0s');
  30                     assert_equals(bufferedRanges.length, 1, 'Just one buffered range');
  31                     assert_less_than_equal(bufferedRanges.start(0), 1.0, 'Buffered range starts <= 1.0s');
  32                     assert_greater_than_equal(bufferedRanges.end(0), 4.0, 'Buffered range ends >= 4.0s');
  33
  34                     test.expectEvent(mediaElement, 'seeking', 'seeking');
  35                     test.expectEvent(mediaElement, 'timeupdate', 'timeupdate');
  36                     test.expectEvent(mediaElement, 'seeked', 'seeked');
  37
  38                     // Request seeks.
  39                     mediaElement.currentTime = 1.0;
  40
  41                     // This 'ephemeral' seek should be invisible to javascript, except any latency incurred in its processing.
  42                     mediaElement.currentTime = 3.0;
  43
  44                     mediaElement.currentTime = 1.0;
  45
  46                     assert_true(mediaElement.seeking, 'Element is seeking');
  47                     assert_equals(mediaElement.currentTime, 1.0, 'Element time is at last seek time');
  48                 });
  49
  50                 test.waitForExpectedEvents(function()
  51                 {
  52                     // No more seeking or seeked events should occur.
  53                     test.failOnEvent(mediaElement, 'seeking');
  54                     test.failOnEvent(mediaElement, 'seeked');
  55
  56                     assert_false(mediaElement.seeking, 'Element is not seeking');
  57                     assert_greater_than_equal(mediaElement.currentTime, 1.0, 'Element time is at or after last seek time');
  58                     assert_less_than(mediaElement.currentTime, 3.0, 'Element time is before the ephemeral seek time');
  59
  60                     var timeBeforeWait = mediaElement.currentTime;
  61                     test.waitForCurrentTimeChange(mediaElement, function()
  62                     {
  63                         // Time should have advanced a little, but not yet reached the ephemeral seek time.
  64                         assert_greater_than(mediaElement.currentTime, timeBeforeWait, 'Element time has increased');
  65                         assert_less_than(mediaElement.currentTime, 3.0, 'Element time is still before the ephemeral seek time');
  66                         test.done();
  67                     });
  68                 });
  69             }, 'Test redundant fully prebuffered seek');
  70
  71         </script>
  72     </body>
  73 </html>