| <!DOCTYPE html> |
| <title>Ensure that the 'cuechange' event is not fired before video playback has begun.</title> |
| <script src="/common/media.js"></script> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| promise_test(function(t) { |
| let video = document.createElement('video'); |
| video.src = getVideoURI('/media/movie_5'); |
| video.preload = 'auto'; |
| |
| // Create a track element. The 'cuechange' event should not be fired. |
| let track = document.createElement('track'); |
| track.oncuechange = t.unreached_func('The \`cuechange\` event should not be fired'); |
| |
| let videoWatcher = new EventWatcher(t, video, 'canplaythrough'); |
| let trackWatcher = new EventWatcher(t, track, ['cuechange', 'load']) |
| |
| track.src = 'resources/captions-fast.vtt'; |
| track.kind = 'captions'; |
| track.default = true; |
| track.track.mode = 'showing'; |
| video.appendChild(track); |
| |
| return Promise.all([videoWatcher.wait_for('canplaythrough'), trackWatcher.wait_for('load')]); |
| }); |
| </script> |
