Test that compositing does not influence the gradient space to context space mapping.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS getPixel(125,50) is close to [0,0,0,0].
PASS getPixel(175,50) is close to [0,128,0,255].
PASS successfullyParsed is true

TEST COMPLETE