refined permutation_iterator unit tests
refined permutation_iterator unit tests

hemmingway/thrust,h1arshad/thrust,levendlee/thrust,bfurtaw/thrust,bfurtaw/thrust,hemmingway/thrust,Vishwa07/thrust,allendaicool/thrust,lishi0927/thrust,Vishwa07/thrust,UIKit0/thrust,bfurtaw/thrust,rdmenezes/thrust,UIKit0/thrust,UIKit0/thrust,levendlee/thrust,h1arshad/thrust,google-code-export/thrust,malenie/thrust,google-code-export/thrust,hemmingway/thrust,allendaicool/thrust,malenie/thrust,julianromera/thrust,Vishwa07/thrust,allendaicool/thrust,lishi0927/thrust,h1arshad/thrust,rdmenezes/thrust,rdmenezes/thrust,levendlee/thrust,malenie/thrust,julianromera/thrust,rdmenezes/thrust,Vishwa07/thrust,levendlee/thrust,malenie/thrust,lishi0927/thrust,google-code-export/thrust,hemmingway/thrust,julianromera/thrust,h1arshad/thrust,UIKit0/thrust,allendaicool/thrust,julianromera/thrust,bfurtaw/thrust,google-code-export/thrust,lishi0927/thrust