| <!DOCTYPE html> |
| <title>A 'change' event is fired when a TextTrack's mode changes</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| async_test(function(t) { |
| var video = document.createElement('video'); |
| var track = video.addTextTrack('subtitles', 'test', 'en'); |
| |
| // addTextTrack() defaults to "hidden", so settings |
| // mode to "showing" should trigger a "change" event. |
| track.mode = 'showing'; |
| assert_equals(video.textTracks.length, 1); |
| |
| video.textTracks.onchange = t.step_func_done(function(event) { |
| assert_equals(event.target, video.textTracks); |
| assert_true(event instanceof Event, 'instanceof'); |
| assert_false(event.hasOwnProperty('track'), 'unexpected property found: "track"'); |
| }); |
| }); |
| </script> |
