sets: adding test for cardinality of arrays.
sets: adding test for cardinality of arrays.

factor/factor,factor/factor,bjourne/factor,factor/factor,sarvex/factor-lang,nicolas-p/factor,nicolas-p/factor,slavapestov/factor,mrjbq7/factor,slavapestov/factor,dch/factor,dch/factor,factor/factor,bpollack/factor,sarvex/factor-lang,bjourne/factor,bjourne/factor,tgunr/factor,bjourne/factor,sarvex/factor-lang,AlexIljin/factor,sarvex/factor-lang,mrjbq7/factor,AlexIljin/factor,bpollack/factor,bpollack/factor,mrjbq7/factor,sarvex/factor-lang,factor/factor,nicolas-p/factor,nicolas-p/factor,dch/factor,dch/factor,tgunr/factor,tgunr/factor,dch/factor,slavapestov/factor,mrjbq7/factor,bpollack/factor,slavapestov/factor,slavapestov/factor,nicolas-p/factor,AlexIljin/factor,tgunr/factor,AlexIljin/factor,AlexIljin/factor,bjourne/factor,bpollack/factor,AlexIljin/factor,bpollack/factor,factor/factor,tgunr/factor,mrjbq7/factor,bpollack/factor,slavapestov/factor,tgunr/factor,mrjbq7/factor,bjourne/factor,sarvex/factor-lang,AlexIljin/factor,nicolas-p/factor,nicolas-p/factor,slavapestov/factor,bjourne/factor,sarvex/factor-lang,dch/factor