def test_inner_walls(self):
# Create maze
n_rows = 4
n_cols = 7
start = '2,0w'
end = '0,3n'
walls = ['2,3w', '2,4w', '2,5w']
maze = Maze(n_rows, n_cols, start, end, walls)
maze._apply_valid_move_constraint() # Apply constraint to populate csp variables
# Check to see that walls appear as variables in maze.csp
for wall in walls:
self.assertTrue(wall in maze.csp.variables)
# Fix wall values
maze._set_inner_walls()
# Check to see that walls are fixed; they would no longer appear as variables
for wall in walls:
self.assertFalse(wall in maze.csp.variables)
# Verify that walls are fixed to 0
# circle_solution surrounds the inner walls, if walls are fixed to 1, solution will fail valid_move_constraint.
# Since start and end locations have not been fixed, a circle is valid path
circle_solution = {'2,2n': 1, '3,2n': 1, '3,3w': 1, '3,4w': 1, '3,5w': 1, '3,5n': 1, '2,5n': 1, '1,5w': 1,
'1,4w': 1, '1,3w': 1}
fill_with_zeros(circle_solution, n_rows, n_cols) # No ignore_list because we didn't fix start and end
self.assertTrue(maze.csp.check(circle_solution))
