Add unit test about post manager&queryset
Add unit test about post manager&queryset

hyesun03/k-board,guswnsxodlf/k-board,hyesun03/k-board,kboard/kboard,guswnsxodlf/k-board,kboard/kboard,hyesun03/k-board,kboard/kboard,cjh5414/kboard,guswnsxodlf/k-board,cjh5414/kboard,darjeeling/k-board,cjh5414/kboard