|----|----|----|----|----|----|----|----|
check_pawn_move(WHITE, 3, 3, 3, 4): VALID_MOVE
check_pawn_move(WHITE, 3, 3, 3, 5): INVALID_MOVE
check_pawn_move(WHITE, 3, 3, 4, 3): INVALID_MOVE
check_pawn_move(WHITE, 3, 3, 5, 3): INVALID_MOVE
check_pawn_move(WHITE, 3, 3, 3, 2): INVALID_MOVE
check_pawn_move(WHITE, 3, 3, 3, 1): INVALID_MOVE
check_pawn_move(WHITE, 3, 3, 2, 3): INVALID_MOVE
check_pawn_move(WHITE, 3, 3, 1, 3): INVALID_MOVE