third_party/WebKit/LayoutTests/http/tests/media/video-preload-metadata.html

   1 <!DOCTYPE html>
   2 <title>Verifies preload=metadata doesn't buffer the entire clip.</title>
   3 <script src="../resources/testharness.js"></script>
   4 <script src="../resources/testharnessreport.js"></script>
   5 <script src="../../media-resources/media-file.js"></script>
   6 <div id="log"></div>
   7 <video controls preload=metadata></video>
   8 <script>
   9 async_test(function(t) {
  10   var have_metadata = false;
  11   var waiting_for_metadata = false;
  12   var video = document.querySelector("video");
  13
  14   video.onloadedmetadata = t.step_func(function() {
  15     have_metadata = true;
  16     if (waiting_for_metadata)
  17       video.onsuspend();
  18   });
  19
  20   video.onsuspend = t.step_func(function() {
  21     // The metadata event may not fire before suspend occurs, so wait if needed;
  22     // while not spec'd, it'd be nice if this wasn't true, see crbug.com/455866.
  23     if (!have_metadata) {
  24       waiting_for_metadata = true;
  25       return;
  26     }
  27
  28     assert_equals(video.buffered.length, 1);
  29     assert_equals(video.seekable.length, 1);
  30
  31     // If the entire clip wasn't buffered, the buffered range should be smaller
  32     // than the seekable range; which should be the duration since the server
  33     // supports range requests.
  34     assert_true(video.buffered.end(0) < video.duration);
  35     assert_equals(video.seekable.end(0), video.duration);
  36     assert_true(video.buffered.end(0) < video.seekable.end(0),
  37                 video.buffered.end(0) + " < " + video.seekable.end(0));
  38     t.done();
  39   });
  40
  41   // Use a .webm to ensure metadata is near the beginning of the file.
  42   var mediaFile = "resources/media-source/webm/test.webm";
  43   video.src = "http://127.0.0.1:8000/media/video-throttled-load.cgi?" +
  44       "nph=1&name=" + mediaFile + "&throttle=40&type=video/webm";
  45 });
  46 </script>