Bug 55696: Series of tests to ensure zero-length arc extends current subpath

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


PASS Pixel (50,20) is black.
PASS Pixel (50,40) is black.
PASS Pixel (50,60) is black.
PASS Pixel (50,80) is black.
PASS successfullyParsed is true

TEST COMPLETE