def testAssignHiddenSingles(self):
board = Board();
board.boardFromString(self.NAKED_SINGLES)
# Create a copy of the original board
originalBoard = Board(board)
easySolver = EasySolver(board)
result = easySolver.assignHiddenSingles()
# Make sure all were assigned
assert(result == 6)
# Make sure that the board now has the singles assigned
assert(board.getPosition(5, 5) == '3')
assert(board.getPosition(7, 6) == '3')
assert(board.getPosition(3, 6) == '5')
assert(board.getPosition(2, 0) == '6')
assert(board.getPosition(8, 7) == '7')
assert(board.getPosition(4, 1) == '7')
# Ensure the only changes to the board are the assigned singles
assert(board != originalBoard)
for y in xrange(board.getDimensions()):
for x in xrange(board.getDimensions()):
# Don't bother checking fields we know have changed
if not (x, y) in [(5, 5), (7, 6), (3, 6), (2, 0), (8, 7), (4, 1)]:
assert(board.getPosition(x, y) ==
originalBoard.getPosition(x, y))
