Test that caption preferences change notifications work

RUN(internals.setCaptionDisplayMode('AlwaysOn'))
RUN(internals.setCaptionsStyleSheetOverride('video::cue { color: blue; background-color: yellow; }'))
RUN(internals.settings.setShouldDisplayTrackKind('Captions', true))

EVENT(canplaythrough)

RUN(video.currentTime = .5)

EVENT(seeked)

** Track should be visible, cue should be styled appropriately. **
EXPECTED (video.textTracks[0].mode == 'showing') OK
EXPECTED (getComputedStyle(textTrackDisplayElement(video, 'cue')).color == 'rgb(0, 0, 255)') OK
EXPECTED (getComputedStyle(textTrackDisplayElement(video, 'cue')).backgroundColor == 'rgb(255, 255, 0)') OK

** Remove the video from the document, add it back. **
RUN(video.parentNode.removeChild(video))
RUN(document.body.appendChild(video))

** Change caption display mode to generate a notification. **
RUN(setCaptionDisplayMode('ForcedOnly'))

** Track should not be visible. **
EXPECTED (video.textTracks[0].mode == 'disabled') OK

END OF TEST