1 

     2 import CW8a._

     3 

     4 assert(legal_moves(8, Nil, (2,2)) == List((3,4), (4,3), (4,1), (3,0), (1,0), (0,1), (0,3), (1,4)))

     5 assert(legal_moves(8, Nil, (7,7)) == List((6,5), (5,6)))

     6 assert(legal_moves(8, List((4,1), (1,0)), (2,2)) == List((3,4), (4,3), (3,0), (0,1), (0,3), (1,4)))

     7 assert(legal_moves(8, List((6,6)), (7,7)) == List((6,5), (5,6)))

     8 assert(legal_moves(1, Nil, (0,0)) == List())

     9 assert(legal_moves(2, Nil, (0,0)) == List())

    10 assert(legal_moves(3, Nil, (0,0)) == List((1,2), (2,1)))

    11