 
RUN(internals.setFullscreenAutoHideDelay(1))
EXPECTED (window.getComputedStyle(target).transitionDuration == '1s') OK
RUN(internals.setFullscreenAutoHideDelay(20))
EXPECTED (window.getComputedStyle(target).transitionDuration == '20s') OK
RUN(internals.setFullscreenAutoHideDelay(0))
EXPECTED (window.getComputedStyle(target).transitionDuration == '0s') OK
END OF TEST