
FAIL Test that an OffscreenCanvas generated by transferControlToOffscreen gets correct width and height when it is transferred to a worker placeholder.transferControlToOffscreen is not a function. (In 'placeholder.transferControlToOffscreen()', 'placeholder.transferControlToOffscreen' is undefined)
FAIL Test that calling getContext on a placeholder canvas that is transferred its control to an OffscreenCanvas throws an exception, when the OffscreenCanvas is transferred to a worker placeholder.transferControlToOffscreen is not a function. (In 'placeholder.transferControlToOffscreen()', 'placeholder.transferControlToOffscreen' is undefined)
FAIL Test that calling transferControlToOffscreen twice throws an exception, when its associated OffscreenCanvas is transferred to a worker placeholder.transferControlToOffscreen is not a function. (In 'placeholder.transferControlToOffscreen()', 'placeholder.transferControlToOffscreen' is undefined)