Test that a stalled event is sent when media loading stalls.

EVENT(durationchange)
EVENT(loadedmetadata)
EVENT(loadeddata)
EVENT(stalled)
EXPECTED (video.currentTime != '0'), OBSERVED '0' FAIL
EXPECTED (video.playbackRate === '1') OK
EXPECTED (video.paused === 'false'), OBSERVED 'true' FAIL
END OF TEST