def test_fill_spaces(self):
with open("solved.su", "r") as f:
dat = f.read().strip()
solved = sudoku.loads(dat)
unsolved = copy.copy(solved)
unsolved[2][2] = 0 # mark a single space as unknown
self.assertFalse(sudoku.validate(unsolved))
self.assertEqual(sudoku.count_unknown(unsolved), 1)
# Can we solve it?
maybe_solved = sudoku.fill_spaces(unsolved)
self.assertEqual(sudoku.count_unknown(maybe_solved), 0)
self.assertEqual(maybe_solved, solved)
self.assertTrue(sudoku.validate(maybe_solved))
def test_no_candidates(self):
"""If a cell has no candidates, the puzzle is malformed"""
grid = [[
1, 2, 3,
set((4, 5)),
set((4, 5)),
set((6, 7, 8)),
set((6, 7, 8)),
set((6, 7, 8)),
set((9, ))
]]
self.assertIsNone(sudoku.validate(grid))
grid[0][-1] = set()
with self.assertRaises(ValueError):
sudoku.validate(grid)
def test_validate(self):
with open("solved.su", "r") as f:
dat = f.read().strip()
# This test sudoku is a valid one!
sudoku_arry = sudoku.loads(dat)
self.assertTrue(sudoku.validate(sudoku_arry))
# Violate several rules...
sudoku_arry[0][0] = 6
sudoku_arry[1][1] = 6
self.assertFalse(sudoku.validate(sudoku_arry))
# Try using an unsolved sudoku!
with open("unsolved.su", "r") as f:
dat = f.read().strip()
# This sudoku is not even solved!
sudoku_arry = sudoku.loads(dat)
self.assertFalse(sudoku.validate(sudoku_arry))
def test_ok(self):
"""Test a grid with conflicting cells"""
grid = [[
1, 2, 3,
set((4, 5)),
set((4, 5)),
set((6, 7, 8)),
set((6, 7, 8)),
set((6, 7, 8)),
set((8, 9))
]]
self.assertIsNone(sudoku.validate(grid))
grid[0][-1] = 9
self.assertIsNone(sudoku.validate(grid))
grid[0][-1] = 1
with self.assertRaises(ValueError):
sudoku.validate(grid)
def place(self, val):
row, col = self.selected
if self.cubes[row][col].value == 0:
self.cubes[row][col].set(val)
self.update_model()
if validate(self.model, val, (row, col)) and solve(self.model):
return True
else:
self.cubes[row][col].set(0)
self.cubes[row][col].set_temp(0)
self.update_model()
return False
