def setUp(self):
self.simple_start_state = ((1, 0, 0), (0, 0, 0), (0, 0, 0))
self.simple_goal_state = ((0, 0, 0), (0, 0, 0), (0, 0, 1))
self.advanced_start_state = ((2, 8, 3), (1, 6, 4), (7, 0, 5))
self.advanced_goal_state = ((1, 2, 3), (8, 0, 4), (7, 6, 5))
self.unsolvable_start_state = ((1, 2, 3, 4), (5, 6, 7, 8),
(9, 10, 11, 12), (13, 14, 15, 0))
self.unsolvable_goal_state = ((1, 2, 3, 4), (5, 6, 7, 8),
(9, 10, 11, 12), (13, 15, 14, 0))
self.my_simple_puzzle = NPuzzle(self.simple_goal_state)
self.my_advanced_puzzle = NPuzzle(self.advanced_goal_state)
self.my_unsolvable_puzzle = NPuzzle(self.unsolvable_goal_state)
def test_find_position(self):
found_position = NPuzzle.find_position(self.advanced_goal_state, 6)
self.assertEqual((1, 2), found_position)
class TestNPuzzle(TestCase):
def setUp(self):
self.simple_start_state = ((1, 0, 0), (0, 0, 0), (0, 0, 0))
self.simple_goal_state = ((0, 0, 0), (0, 0, 0), (0, 0, 1))
self.advanced_start_state = ((2, 8, 3), (1, 6, 4), (7, 0, 5))
self.advanced_goal_state = ((1, 2, 3), (8, 0, 4), (7, 6, 5))
self.unsolvable_start_state = ((1, 2, 3, 4), (5, 6, 7, 8),
(9, 10, 11, 12), (13, 14, 15, 0))
self.unsolvable_goal_state = ((1, 2, 3, 4), (5, 6, 7, 8),
(9, 10, 11, 12), (13, 15, 14, 0))
self.my_simple_puzzle = NPuzzle(self.simple_goal_state)
self.my_advanced_puzzle = NPuzzle(self.advanced_goal_state)
self.my_unsolvable_puzzle = NPuzzle(self.unsolvable_goal_state)
def test_manhattan_distance(self):
simple_manhattan_distance = self.my_simple_puzzle.manhattan_distance(
self.simple_start_state, self.simple_goal_state)
self.assertEqual(4, simple_manhattan_distance)
advanced_manhattan_distance = self.my_advanced_puzzle.manhattan_distance(
self.advanced_start_state, self.advanced_goal_state)
self.assertEqual(5, advanced_manhattan_distance)
def test_generates_next_moves_from_center(self):
original_state = ((1, 2, 3), (8, 0, 4), (7, 6, 5))
next_state_1 = ((1, 0, 3), (8, 2, 4), (7, 6, 5))
next_state_2 = ((1, 2, 3), (8, 6, 4), (7, 0, 5))
next_state_3 = ((1, 2, 3), (0, 8, 4), (7, 6, 5))
next_state_4 = ((1, 2, 3), (8, 4, 0), (7, 6, 5))
possible_next_states = set(
[next_state_1, next_state_2, next_state_3, next_state_4])
self.assertEqual(
self.my_advanced_puzzle.generate_next_states(original_state),
possible_next_states)
def test_generates_next_moves_from_bottom_right_edge(self):
original_state = ((1, 2, 3), (4, 5, 6), (7, 8, 0))
next_state_1 = ((1, 2, 3), (4, 5, 6), (7, 0, 8))
next_state_2 = ((1, 2, 3), (4, 5, 0), (7, 8, 6))
possible_next_states = set([next_state_1, next_state_2])
self.assertEqual(
self.my_advanced_puzzle.generate_next_states(original_state),
possible_next_states)
def test_generates_next_moves_from_top_left_edge(self):
original_state = ((0, 2, 3), (4, 5, 6), (7, 8, 1))
next_state_1 = ((2, 0, 3), (4, 5, 6), (7, 8, 1))
next_state_2 = ((4, 2, 3), (0, 5, 6), (7, 8, 1))
possible_next_states = set([next_state_1, next_state_2])
self.assertEqual(
self.my_advanced_puzzle.generate_next_states(original_state),
possible_next_states)
def test_find_position(self):
found_position = NPuzzle.find_position(self.advanced_goal_state, 6)
self.assertEqual((1, 2), found_position)
def test_finds_two_linear_conflicts(self):
linear_conflict_for_advanced_state = ((2, 1, 3), (8, 0, 5), (7, 6, 4))
self.assertEqual(
4,
self.my_advanced_puzzle.linear_conflicts(
linear_conflict_for_advanced_state))
def test_finds_unsolvable_board_is_unsolvable(self):
self.assertFalse(
self.my_unsolvable_puzzle.solvable_from_state(
self.unsolvable_start_state))
def test_finds_solvable_board_is_solvable(self):
self.assertTrue(
self.my_advanced_puzzle.solvable_from_state(
self.advanced_start_state))