def test_unsolvable(self):
board = Board()
board.solve()
board.blocks = [
board.get_block_at_position(0),
board.get_block_at_position(1),
board.get_block_at_position(2),
board.get_block_at_position(5),
board.get_block_at_position(7),
board.get_block_at_position(3),
board.get_block_at_position(4),
board.get_block_at_position(6),
board.get_block_at_position(8),
]
for block in board.blocks:
block.position = board.blocks.index(block)
self.assertFalse(board.is_solvable)
