def test_update(self):
board = self.easy_board
s = Sodoku(board)
i, j = s.get_feasible_ordered()[0]
f = s.find_feasible(i, j)
s.update(i, j, next(iter(f)))
self.assertTrue(s.is_valid())
return
def test_feasible(self):
board = self.easy_board
s = Sodoku(board)
feasible = set(s.find_feasible(4, 4))
self.assertEqual(feasible, {3, 7, 8})
return