refined permutation_iterator unit tests
refined permutation_iterator unit tests

--HG--
extra : convert_revision : svn%3A83215879-3e5a-4751-8c9d-778f44bb06a5/trunk%40745

marksantos/thrust,arnabgho/thrust,xiongzhanblake/thrust_src,sarvex/thrust,xiongzhanblake/thrust,jaredhoberock/thrust,raygit/thrust,zeryx/thrust,dachziegel/thrust,andrewcorrigan/thrust-multi-permutation-iterator,zhenglaizhang/thrust,zeryx/thrust,raygit/thrust,thrust/thrust,GrimDerp/thrust,sdalton1/thrust,egaburov/thrust,andrewcorrigan/thrust-multi-permutation-iterator,GrimDerp/thrust,sdalton1/thrust,arnabgho/thrust,sarvex/thrust,jaredhoberock/thrust,sarvex/thrust,xiongzhanblake/thrust,dachziegel/thrust,jaredhoberock/thrust,xiongzhanblake/thrust_src,zhenglaizhang/thrust,arnabgho/thrust,jaredhoberock/thrust,andrewcorrigan/thrust-multi-permutation-iterator,thvasilo/thrust,raygit/thrust,egaburov/thrust,zeryx/thrust,mohamed-ali/thrust,egaburov/thrust,thvasilo/thrust,zhenglaizhang/thrust,xiongzhanblake/thrust,marksantos/thrust,Ricardo666666/thrust,mohamed-ali/thrust,marksantos/thrust,Ricardo666666/thrust,thrust/thrust,sdalton1/thrust,xiongzhanblake/thrust_src,mohamed-ali/thrust,thrust/thrust,thvasilo/thrust,jaredhoberock/thrust,GrimDerp/thrust,Ricardo666666/thrust,thrust/thrust,thrust/thrust,dachziegel/thrust