def test_is_not_solved(self):
board = Board("""
1 2 3 4
5 6 7 8
9 10 11 12
13 14 . 15
""")
self.assertFalse(board.is_solved())
def test_is_solved(self):
board = Board("""
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 .
""")
self.assertTrue(board.is_solved())
def test_shuffle(self):
board = Board("""
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 .
""")
board.shuffle()
self.assertFalse(board.is_solved())
