update CharMatrix2d to use the Test library. Some tests fail.
update CharMatrix2d to use the Test library. Some tests fail.

Whiteknight/parrot-linear-algebra,fernandobrito/parrot-linear-algebra,fernandobrito/parrot-linear-algebra,fernandobrito/parrot-linear-algebra,Whiteknight/parrot-linear-algebra,fernandobrito/parrot-linear-algebra