def test_pop_only_element():
ll = SinglyLinkedList()
for data in [0, "a", 1.5, [], {}, SinglyLinkedList()]:
ll.insert(0, data)
assert (not ll.is_empty())
assert (id(ll.peek_head()) == id(ll.peek_tail()))
actual = ll.pop(0)
assert (ll.is_empty())
assert (actual == data)
def test_peek_invalid():
ll = SinglyLinkedList()
with pytest.raises(AssertionError):
ll.peek(0)
ll.insert(0, 0)
for i in range(-ITERS // 2, ITERS // 2 + 1):
if i == 0: continue
with pytest.raises(AssertionError):
ll.peek(i)
def test_insert_invalid():
ll = SinglyLinkedList()
for i in range(-ITERS // 2, 0):
with pytest.raises(AssertionError):
ll.insert(i, 0)
for i in range(1, ITERS // 2 + 1):
with pytest.raises(AssertionError):
ll.insert(i, 0)
assert (ll.is_empty())
def test_reverse():
ll, arr = SinglyLinkedList(), []
for i in range(ITERS):
if i != 0:
ll.insert(0, i)
arr.insert(0, i)
ll.reverse()
arr = arr[::-1]
assert (ll.to_array() == arr)
class TestSinglyLinkedList(TestCase):
def setUp(self):
self.sll = SinglyLinkedList()
self.sll.insert(1)
self.sll.insert(2)
self.sll.insert(3)
def test_insert(self):
"""Ensures linked list can insert values"""
self.assertEqual(self.sll.head.val, 1)
self.assertEqual(self.sll.head.next.val, 2)
self.assertEqual(self.sll.head.next.next.val, 3)
def test_search(self):
"""Return node with given value if it exists in linked list, otherwise returns False"""
target_node = self.sll.search(2)
self.assertEqual(target_node.val, 2)
self.assertEqual(target_node.next.val, 3)
self.assertFalse(self.sll.search(4))
def test_remove_head(self):
self.assertEqual(self.sll.head.val, 1)
self.sll.remove_head()
self.assertEqual(self.sll.head.val, 2)
self.assertEqual(self.sll.head.next.val, 3)
self.assertEqual(self.sll.head.next.next, None)
def test_remove_head_only(self):
self.sll.remove_node(3)
self.sll.remove_node(2)
self.assertEqual(self.sll.head.val, 1)
self.assertEqual(self.sll.head.next, None)
self.sll.remove_head()
self.assertEqual(self.sll.head.val, None)
def test_delete_node(self):
self.sll.remove_node(2)
self.assertEqual(self.sll.head.val, 1)
self.assertEqual(self.sll.head.next.val, 3)
self.sll.remove_node(1)
self.assertEqual(self.sll.head.val, 3)
self.sll.remove_node(3)
self.assertEqual(self.sll.head.val, None)
def test_random_ops():
ll, arr = SinglyLinkedList(), []
for i in range(ITERS):
index = random.randrange(i + 1)
data = random.randrange(MAX_VAL)
ll.insert(index, data)
arr.insert(index, data)
assert (ll.to_array() == arr)
for i in range(ITERS):
index = random.randrange(ITERS)
actual = ll.peek(index)
expected = arr[index]
assert (actual == expected)
for i in range(ITERS, 0, -1):
index = random.randrange(i)
actual = arr.pop(index)
expected = ll.pop(index)
assert (actual == expected)
assert (ll.to_array() == arr)
assert (ll.is_empty() and len(arr) == 0)
class TestDataStructures(unittest.TestCase):
def setUp(self):
self.stack = Stack(range(1, 6))
self.queue = Queue(range(1, 6))
self.single = SinglyLinkedList()
self.double = DoublyLinkedList()
self.btree = BinaryTree()
# STACK
def test_stack_push(self):
self.stack.push(6)
self.assertEqual(self.stack.stack, range(1, 7))
def test_stack_pop(self):
self.assertEqual(self.stack.pop(), 5)
self.assertEqual(self.stack.pop(), 4)
def test_stack_peek(self):
self.assertEqual(self.stack.peek(), 5)
# QUEUE
def test_queue_push(self):
self.queue.push(6)
self.assertEqual(self.queue.queue, range(1, 7))
def test_queue_pop(self):
self.assertEqual(self.queue.pop(), 1)
self.assertEqual(self.queue.pop(), 2)
def test_queue_peek(self):
self.assertEqual(self.queue.peek(), 1)
self.queue.pop()
self.assertEqual(self.queue.peek(), 2)
# SINGLY-LINKED LIST
def test_add_nodes_to_single(self):
node1, node2, node3 = Node(1), Node(2), Node(3)
self.single._insert(node1)
self.single._insert(node2, node1)
self.assertEqual(self.single.head.value, 1)
next = self.single.head.next
self.assertEqual(next, node2)
self.assertEqual(next.value, 2)
self.single._insert(node3, node2)
nextnext = self.single.head.next.next
self.assertEqual(nextnext, node3)
def test_add_node_to_beginning_of_single(self):
node0, node1 = Node(0), Node(1)
self.single._insert(node1)
self.single._insert(node0)
self.assertEqual(self.single.head.value, 0)
self.assertEqual(self.single.head.next.value, 1)
def test_remove_nodes_single(self):
node1, node2, node3, node4 = Node(1), Node(2), Node(3), Node(4)
self.single._insert(node1)
self.single._insert(node2, node1)
self.single._insert(node3, node2)
self.single._insert(node4, node3)
self.single._remove(node2)
self.assertEqual(node2.next, node4)
def test_remove_node_from_beginning_single(self):
node1, node2, node3 = Node(1), Node(2), Node(3)
self.single._insert(node1)
self.single._insert(node2, node1)
self.single._insert(node3, node2)
self.single._remove()
self.assertEqual(self.single.head, node2)
def test_single_iteration(self):
node1, node2, node3, node4 = Node(1), Node(2), Node(3), Node(4)
self.single._insert(node1)
self.single._insert(node2, node1)
self.single._insert(node3, node2)
self.single._insert(node4, node3)
self.assertEqual([node for node in self.single], [node1, node2, node3, node4])
def test_add_node_to_single_for_real(self):
self.single.insert(2, 0)
self.assertEqual(self.single[0].value, 2)
self.single.insert(1, 0)
self.assertEqual(self.single[0].value, 1)
self.single.insert(3, 2)
self.assertEqual(self.single[2].value, 3)
self.single.insert(4, 100)
self.assertEqual(self.single[3].value, 4)
def test_remove_node_from_single_for_real(self):
for i in range(4, 0, -1):
self.single.insert(i, 0)
# [1, 2, 3, 4]
self.single.remove(1)
# [1, 3, 4]
self.assertEqual(self.single[1].value, 3)
self.single.remove(2)
# [1, 3]
self.assertEqual(self.single[0].value, 1)
self.assertEqual(self.single[1].value, 3)
# DOUBLE-LINKED LIST
def test_iteration_double(self):
node1, node2, node3 = Node(1), Node(2), Node(3)
node1.next, node2.next, node3.next = node2, node3, None
node1.prev, node2.prev, node3.prev = None, node1, node2
self.double.head = node1
self.double.tail = node3
# test __iter__
self.assertEqual([str(i) for i in self.double], [str(i) for i in range(1, 4)])
# test iterating over reversed
self.assertEqual([str(i) for i in reversed(self.double)], [str(i) for i in range(3, 0, -1)])
def test_double_slicing(self):
node1, node2, node3 = Node(1), Node(2), Node(3)
node1.next, node2.next, node3.next = node2, node3, None
node1.prev, node2.prev, node3.prev = None, node1, node2
self.double.head = node1
self.double.tail = node3
self.assertEqual(self.double[0].value, 1)
self.assertEqual(self.double[1].value, 2)
self.assertEqual(self.double[2].value, 3)
self.assertRaises(IndexError, lambda val: self.double[val], 3)
def test_base_insert_moving_forwards_with_double(self):
node1, node2, node3 = Node(1), Node(2), Node(3)
self.double._insert(node1)
self.assertTrue(test_node(self.double[0], 1, None, None))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[0]))
self.double._insert(node3, node1)
self.assertTrue(test_node(self.double[0], 1, 3, None))
self.assertTrue(test_node(self.double[1], 3, None, 1))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[1]))
self.double._insert(node2, node1)
self.assertTrue(test_node(self.double[0], 1, 2, None))
self.assertTrue(test_node(self.double[1], 2, 3, 1))
self.assertTrue(test_node(self.double[2], 3, None, 2))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[2]))
self.assertEqual(str(self.double), str([str(i) for i in range(1, 4)]))
def test_base_insert_moving_backwards_with_double(self):
node1, node2, node3 = Node(1), Node(2), Node(3)
# insert node3 at the beginning/end of the list
self.double._rev_insert(node3)
self.assertTrue(test_node(self.double[0], 3, None, None))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[0]))
# insert node one before node 3 ([node1, node3])
self.double._rev_insert(node1, node3)
self.assertTrue(test_node(self.double[0], 1, 3, None))
self.assertTrue(test_node(self.double[1], 3, None, 1))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[1]))
# insert node2 before node3 ([node1, node2, node3])
self.double._rev_insert(node2, node3)
self.assertTrue(test_node(self.double[0], 1, 2, None))
self.assertTrue(test_node(self.double[1], 2, 3, 1))
self.assertTrue(test_node(self.double[2], 3, None, 2))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[2]))
# check that the array is [node1, node2, node3]
self.assertEqual(str(self.double), str([str(i) for i in range(1, 4)]))
def test_insert_at_beginning_of_double(self):
self.double.insert(2, 0)
self.assertTrue(test_node(self.double[0], 2, None, None))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[0]))
self.double.insert(1, 0)
self.assertTrue(test_node(self.double[0], 1, 2, None))
self.assertTrue(test_node(self.double[1], 2, None, 1))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[1]))
def test_insert_in_middle_and_end_of_double(self):
self.double.insert(1, 0)
self.double.insert(3, 1)
self.assertTrue(test_node(self.double[0], 1, 3, None))
self.assertTrue(test_node(self.double[1], 3, None, 1))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[1]))
self.double.insert(2, 1)
self.assertTrue(test_node(self.double[0], 1, 2, None))
self.assertTrue(test_node(self.double[1], 2, 3, 1))
self.assertTrue(test_node(self.double[2], 3, None, 2))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[2]))
self.double.insert(5, 3)
self.assertTrue(test_node(self.double[0], 1, 2, None))
self.assertTrue(test_node(self.double[1], 2, 3, 1))
self.assertTrue(test_node(self.double[2], 3, 5, 2))
self.assertTrue(test_node(self.double[3], 5, None, 3))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[3]))
self.double.insert(4, 3)
self.assertTrue(test_node(self.double[0], 1, 2, None))
self.assertTrue(test_node(self.double[1], 2, 3, 1))
self.assertTrue(test_node(self.double[2], 3, 4, 2))
self.assertTrue(test_node(self.double[3], 4, 5, 3))
self.assertTrue(test_node(self.double[4], 5, None, 4))
self.assertTrue(test_linked_list(self.double, self.double[0], self.double[4]))
# Binary Tree
def test_binary_node_equality(self):
one = BinaryNode(1)
one2 = BinaryNode(1)
self.assertTrue(one == one2)
two = BinaryNode(2)
self.assertFalse(one == two)
def test_add_internal_child_to_binary_node(self):
one = BinaryNode(1)
two = BinaryNode(2)
three = BinaryNode(3)
one.left = three
# one = {left: 3, right: None}
one.insert(two, three)
self.assertTrue(test_binary_node(one, 1, 2, None, None))
self.assertTrue(test_binary_node(two, 2, 3, None, 1))
self.assertTrue(test_binary_node(three, 3, None, None, 2))
def test_add_external_child_to_binary_node(self):
one = BinaryNode(1)
two = BinaryNode(2)
one.insert(two)
self.assertTrue(test_binary_node(one, 1, 2, None, None))
self.assertTrue(test_binary_node(two, 2, None, None, 1))
three = BinaryNode(3)
one.insert(three)
self.assertTrue(test_binary_node(one, 1, 2, 3, None))
self.assertTrue(test_binary_node(two, 2, None, None, 1))
self.assertTrue(test_binary_node(three, 3, None, None, 1))
four = BinaryNode(4)
two.insert(four)
self.assertTrue(test_binary_node(two, 2, 4, None, 1))
self.assertTrue(test_binary_node(four, 4, None, None, 2))
def test_depth_first_generation(self):
self.btree.root = deep_btree()
self.assertEquals([int(str(n)) for n in self.btree.depth_gen(self.btree.root)], range(1, 9))
def test_breadth_first_generation(self):
self.btree.root = wide_btree()
self.assertEqual([int(str(n)) for n in self.btree.breadth_gen([self.btree.root])], range(1, 9))
def test_binary_tree_iteration(self):
self.btree.root = deep_btree()
self.assertEquals([int(str(n)) for n in self.btree], range(1, 9))
def test_contains(self):
self.btree.root = deep_btree()
for i in range(1, 9):
self.assertTrue(i in self.btree)
self.assertFalse(0 in self.btree)
self.assertFalse(9 in self.btree)
def test_insert_into_binary_tree(self):
## note - indexing grabs the node with that VALUE, not the node that exists at that index
# 1
self.btree.insert(1)
self.assertTrue(test_binary_node(self.btree[1], 1, None, None, None))
self.btree.insert(4, 1)
# 1
# /
# 4
self.assertTrue(test_binary_node(self.btree[1], 1, 4, None, None))
self.assertTrue(test_binary_node(self.btree[4], 4, None, None, 1))
self.btree.insert(3, 1)
# 1
# / \
# 4 3
self.assertTrue(test_binary_node(self.btree[1], 1, 4, 3, None))
self.assertTrue(test_binary_node(self.btree[4], 4, None, None, 1))
self.assertTrue(test_binary_node(self.btree[3], 3, None, None, 1))
self.btree.insert(2, 1, 4)
# 1
# / \
# 2 3
# /
# 4
self.assertTrue(test_binary_node(self.btree[1], 1, 2, 3, None))
self.assertTrue(test_binary_node(self.btree[2], 2, 4, None, 1))
self.assertTrue(test_binary_node(self.btree[3], 3, None, None, 1))
self.assertTrue(test_binary_node(self.btree[4], 4, None, None, 2))
# Binary Search Tree
def test_binary_search_node(self):
root = binary_search_tree()
for i in range(1, 9):
self.assertTrue(root.search(i))
self.assertFalse(root.search(0))
self.assertFalse(root.search(9))
def test_binary_search_insert(self):
# 5
# / \
# 3 8
# / \ /
# 2 4 6
root = BinarySearchNode(5)
self.assertTrue(test_binary_node(root, 5, None, None, None))
root.insert(3)
self.assertTrue(test_binary_node(root, 5, 3, None, None))
self.assertTrue(test_binary_node(root[3], 3, None, None, 5))
root.insert(8)
self.assertTrue(test_binary_node(root, 5, 3, 8, None))
self.assertTrue(test_binary_node(root[3], 3, None, None, 5))
self.assertTrue(test_binary_node(root[8], 8, None, None, 5))
root.insert(4)
self.assertTrue(test_binary_node(root, 5, 3, 8, None))
self.assertTrue(test_binary_node(root[3], 3, None, 4, 5))
self.assertTrue(test_binary_node(root[8], 8, None, None, 5))
self.assertTrue(test_binary_node(root[4], 4, None, None, 3))
root.insert(2)
self.assertTrue(test_binary_node(root, 5, 3, 8, None))
self.assertTrue(test_binary_node(root[3], 3, 2, 4, 5))
self.assertTrue(test_binary_node(root[8], 8, None, None, 5))
self.assertTrue(test_binary_node(root[2], 2, None, None, 3))
self.assertTrue(test_binary_node(root[4], 4, None, None, 3))
root.insert(6)
self.assertTrue(test_binary_node(root, 5, 3, 8, None))
self.assertTrue(test_binary_node(root[3], 3, 2, 4, 5))
self.assertTrue(test_binary_node(root[8], 8, 6, None, 5))
self.assertTrue(test_binary_node(root[2], 2, None, None, 3))
self.assertTrue(test_binary_node(root[4], 4, None, None, 3))
self.assertTrue(test_binary_node(root[6], 6, None, None, 8))
# def test_binary_search_remove_external_node(self):
# root = binary_search_tree()
# root.remove(1)
# self.assertTrue(test_binary_node(root, 5, 3, 8, None))
# self.assertTrue(test_binary_node(root[3], 3, 2, 4, 5))
# self.assertTrue(test_binary_node(root[8], 8, 6, None, 5))
# self.assertTrue(test_binary_node(root[2], 2, None, None, 3))
# self.assertTrue(test_binary_node(root[4], 4, None, None, 3))
# self.assertTrue(test_binary_node(root[6], 6, None, 7, 8))
# self.assertTrue(test_binary_node(root[7], 7, None, None, 6))
# self.assertFalse(1 in root)
# self.assertFalse(root.search(1))
def test_binary_search_remove_internal_node_without_children(self):
root = binary_search_tree()
root.remove(3, root[4])
self.assertTrue(test_binary_node(root, 5, 4, 8, None))
self.assertTrue(test_binary_node(root[4], 4, 2, None, 5))
self.assertTrue(test_binary_node(root[8], 8, 6, None, 5))
self.assertTrue(test_binary_node(root[2], 2, 1, None, 4))
self.assertTrue(test_binary_node(root[6], 6, None, 7, 8))
self.assertTrue(test_binary_node(root[7], 7, None, None, 6))
self.assertFalse(3 in root)
def test_binary_search_remove_internal_node_with_children1(self):
root = binary_search_tree()
root.insert(3.5)
root.insert(4.5)
root.remove(3, root[4])
self.assertTrue(test_binary_node(root, 5, 4, 8, None))
self.assertTrue(test_binary_node(root[4], 4, 3.5, 4.5, 5))
self.assertTrue(test_binary_node(root[8], 8, 6, None, 5))
self.assertTrue(test_binary_node(root[2], 2, 1, None, 3.5))
self.assertTrue(test_binary_node(root[6], 6, None, 7, 8))
self.assertTrue(test_binary_node(root[1], 1, None, None, 2))
self.assertTrue(test_binary_node(root[3.5], 3.5, 2, None, 4))
self.assertTrue(test_binary_node(root[4.5], 4.5, None, None, 4))
self.assertTrue(test_binary_node(root[7], 7, None, None, 6))
self.assertFalse(3 in root)
def test_binary_search_remove_internal_node_with_children2(self):
root = binary_search_tree()
root.insert(3.5)
root.insert(4.5)
root.remove(3, root[2])
self.assertTrue(test_binary_node(root, 5, 2, 8, None))
self.assertTrue(test_binary_node(root[2], 2, 1, 4, 5))
self.assertTrue(test_binary_node(root[8], 8, 6, None, 5))
self.assertTrue(test_binary_node(root[6], 6, None, 7, 8))
self.assertTrue(test_binary_node(root[1], 1, None, None, 2))
self.assertTrue(test_binary_node(root[4], 4, 3.5, 4.5, 2))
self.assertTrue(test_binary_node(root[3.5], 3.5, None, None, 4))
self.assertTrue(test_binary_node(root[4.5], 4.5, None, None, 4))
self.assertTrue(test_binary_node(root[7], 7, None, None, 6))
self.assertFalse(3 in root)
# HEAP
def test_heap_iteration(self):
heap = Heap(max_heap())
self.assertEqual([int(str(n)) for n in heap.breadth()], [17, 15, 10, 6, 10, 7])
self.assertEqual([int(str(n)) for n in heap], [17, 15, 10, 6, 10, 7])
self.assertEqual(heap.flatten(), [17, 15, 10, 6, 10, 7])
def test_find_open_with_empty_aunt(self):
node17 = HeapNode(17)
node15 = HeapNode(15)
node11 = HeapNode(11)
node6 = HeapNode(6)
node10 = HeapNode(10)
node17.left = node15
node17.right = node11
node15.left = node6
node15.right = HeapNode(10)
heap = Heap(node17)
self.assertEqual(heap[-1].value, 10)
self.assertEqual(heap.find_open(), (node11, 'left'))
def test_find_open_with_single_child_aunt(self):
node17 = HeapNode(17)
node15 = HeapNode(15)
node11 = HeapNode(11)
node6 = HeapNode(6)
node10 = HeapNode(10)
node7 = HeapNode(7)
node17.left = node15
node17.right = node11
node15.left = node6
node15.right = HeapNode(10)
node11.left = node7
heap = Heap(node17)
self.assertEqual(heap[-1].value, 7)
self.assertEqual(heap.find_open(), (node11, 'right'))
def test_find_open_with_non_empty_aunt(self):
node17 = HeapNode(17)
node15 = HeapNode(15)
node11 = HeapNode(11)
node6 = HeapNode(6)
node10 = HeapNode(10)
node7 = HeapNode(7)
node5 = HeapNode(5)
node17.left = node15
node17.right = node11
node15.left = node6
node15.right = HeapNode(10)
node11.left = node7
node11.right = node5
heap = Heap(node17)
self.assertEqual(heap[-1].value, 5)
self.assertEqual(heap.find_open(), (node6, 'left'))
def test_insert(self):
node17 = HeapNode(17)
heap = Heap(node17)
heap.insert(15)
self.assertTrue(test_binary_node(heap.root, 17, 15, None, None))
self.assertTrue(test_binary_node(heap.root.left, 15, None, None, 17))
heap.insert(10)
self.assertTrue(test_binary_node(heap.root, 17, 15, 10, None))
self.assertTrue(test_binary_node(heap.root.left, 15, None, None, 17))
self.assertTrue(test_binary_node(heap.root.right, 10, None, None, 17))
heap.insert(6)
self.assertTrue(test_binary_node(heap.root, 17, 15, 10, None))
self.assertTrue(test_binary_node(heap.root.left, 15, 6, None, 17))
self.assertTrue(test_binary_node(heap.root.right, 10, None, None, 17))
self.assertTrue(test_binary_node(heap.root.left.left, 6, None, None, 15))
heap.insert(10)
self.assertTrue(test_binary_node(heap.root, 17, 15, 10, None))
self.assertTrue(test_binary_node(heap.root.left, 15, 6, 10, 17))
self.assertTrue(test_binary_node(heap.root.right, 10, None, None, 17))
self.assertTrue(test_binary_node(heap.root.left.left, 6, None, None, 15))
self.assertTrue(test_binary_node(heap.root.left.right, 10, None, None, 15))
heap.insert(7)
self.assertTrue(test_binary_node(heap.root, 17, 15, 10, None))
self.assertTrue(test_binary_node(heap.root.left, 15, 6, 10, 17))
self.assertTrue(test_binary_node(heap.root.right, 10, 7, None, 17))
self.assertTrue(test_binary_node(heap.root.left.left, 6, None, None, 15))
self.assertTrue(test_binary_node(heap.root.left.right, 10, None, None, 15))
self.assertTrue(test_binary_node(heap.root.right.left, 7, None, None, 10))
def test_bubble(self):
# 17 17 100
# / \ / \ / \
# 15 10 --> 15 100 --> 15 17
# / \ / \ / \ / \ / \ / \
# 6 10 7 100 6 10 7 10 6 10 7 10
heap = Heap(max_heap())
parent = heap.root.right
last = HeapNode(100)
parent.right = last
last.parent = parent
heap.bubble(last)
self.assertTrue(test_binary_node(heap.root, 100, 15, 17, None))
self.assertTrue(test_binary_node(heap.root.right, 17, 7, 10, 100))
self.assertTrue(test_binary_node(heap.root.right.left, 7, None, None, 17))
self.assertTrue(test_binary_node(heap.root.right.right, 10, None, None, 17))
# 100 100 100
# / \ / \ / \
# 15 17 --> 15 17 --> 99 17
# / \ / \ / \ / \ / \ / \
# 6 10 7 10 99 10 7 10 15 10 7 10
# / / /
# 99 6 6
parent = heap.root.left.left
last = HeapNode(99)
last.parent = parent
parent.left = last
heap.bubble(last)
self.assertTrue(test_binary_node(heap.root, 100, 99, 17, None))
self.assertTrue(test_binary_node(heap.root.left, 99, 15, 10, 100))
self.assertTrue(test_binary_node(heap.root.left.left, 15, 6, None, 99))
self.assertTrue(test_binary_node(heap.root.left.right, 10, None, None, 99))
self.assertTrue(test_binary_node(heap.root.left.left.left, 6, None, None, 15))
# 100 100 100
# / \ / \ / \
# 99 17 --> 99 17 --> 100 17
# / \ / \ / \ / \ / \ / \
# 15 10 7 10 15 100 7 10 15 99 7 10
# / \ / / \ / / \ /
# 6 12 100 6 12 10 6 12 10
fifteen = heap.root.left.left
twelve = HeapNode(12)
twelve.parent = fifteen
fifteen.right = twelve
ten = heap.root.left.right
last = HeapNode(100)
ten.left = last
last.parent = ten
heap.bubble(last)
self.assertTrue(test_binary_node(heap.root, 100, 100, 17, None))
self.assertTrue(test_binary_node(heap.root.left, 100, 15, 99, 100))
self.assertTrue(test_binary_node(heap.root.left.left, 15, 6, 12, 100))
self.assertTrue(test_binary_node(heap.root.left.right, 99, 10, None, 100))
def test_insertion_with_percolation(self):
# 17
# / \
# 15 10
# / \ /
# 6 10 7
# 6
six = HeapNode(6)
heap = Heap(six)
self.assertTrue(test_binary_node(heap.root, 6, None, None, None))
# 6 10
# / --> /
# 10 6
heap.insert(10)
self.assertTrue(test_binary_node(heap.root, 10, 6, None, None))
self.assertTrue(test_binary_node(heap.root.left, 6, None, None, 10))
# 10 10
# / \ --> / \
# 6 7 6 7
heap.insert(7)
self.assertTrue(test_binary_node(heap.root, 10, 6, 7, None))
self.assertTrue(test_binary_node(heap.root.left, 6, None, None, 10))
self.assertTrue(test_binary_node(heap.root.right, 7, None, None, 10))
# 10 15
# / \ --> / \
# 6 7 10 7
# / /
# 15 6
heap.insert(15)
self.assertTrue(test_binary_node(heap.root, 15, 10, 7, None))
self.assertTrue(test_binary_node(heap.root.left, 10, 6, None, 15))
self.assertTrue(test_binary_node(heap.root.right, 7, None, None, 15))
self.assertTrue(test_binary_node(heap.root.left.left, 6, None, None, 10))
# 15 17
# / \ --> / \
# 10 7 15 7
# / \ / \
# 6 17 6 10
heap.insert(17)
self.assertTrue(test_binary_node(heap.root, 17, 15, 7, None))
self.assertTrue(test_binary_node(heap.root.left, 15, 6, 10, 17))
self.assertTrue(test_binary_node(heap.root.right, 7, None, None, 17))
self.assertTrue(test_binary_node(heap.root.left.left, 6, None, None, 15))
self.assertTrue(test_binary_node(heap.root.left.right, 10, None, None, 15))
# 17 17
# / \ --> / \
# 15 7 15 11
# / \ / / \ /
# 6 10 11 6 10 7
heap.insert(11)
self.assertTrue(test_binary_node(heap.root, 17, 15, 11, None))
self.assertTrue(test_binary_node(heap.root.left, 15, 6, 10, 17))
self.assertTrue(test_binary_node(heap.root.right, 11, 7, None, 17))
self.assertTrue(test_binary_node(heap.root.left.left, 6, None, None, 15))
self.assertTrue(test_binary_node(heap.root.left.right, 10, None, None, 15))
self.assertTrue(test_binary_node(heap.root.right.left, 7, None, None, 11))
def test_build_from_array(self):
heap1 = [17, 15, 11, 6, 10, 7]
heap2 = [6, 10, 7, 15, 17, 11]
heap = Heap(array=heap1)
self.assertTrue(test_binary_node(heap.root, 17, 15, 11, None))
self.assertTrue(test_binary_node(heap.root.left, 15, 6, 10, 17))
self.assertTrue(test_binary_node(heap.root.right, 11, 7, None, 17))
self.assertTrue(test_binary_node(heap.root.left.left, 6, None, None, 15))
self.assertTrue(test_binary_node(heap.root.left.right, 10, None, None, 15))
self.assertTrue(test_binary_node(heap.root.right.left, 7, None, None, 11))
heap = Heap(array=heap2)
self.assertTrue(test_binary_node(heap.root, 17, 15, 11, None))
self.assertTrue(test_binary_node(heap.root.left, 15, 6, 10, 17))
self.assertTrue(test_binary_node(heap.root.right, 11, 7, None, 17))
self.assertTrue(test_binary_node(heap.root.left.left, 6, None, None, 15))
self.assertTrue(test_binary_node(heap.root.left.right, 10, None, None, 15))
self.assertTrue(test_binary_node(heap.root.right.left, 7, None, None, 11))
def test_delete(self):
# 17 7 15 15
# / \ / \ / \ / \
# 15 11 --> 15 11 --> 7 11 --> 10 11
# / \ / / \ / \ / \
# 6 10 7 6 10 6 10 6 7
heap = Heap(max_heap())
heap[2].value = 11
heap.delete_root()
self.assertTrue(test_binary_node(heap.root, 15, 10, 11, None))
self.assertTrue(test_binary_node(heap.root.left, 10, 6, 7, 15))
self.assertTrue(test_binary_node(heap.root.right, 11, None, None, 15))
self.assertTrue(test_binary_node(heap.root.left.left, 6, None, None, 10))
self.assertTrue(test_binary_node(heap.root.left.right, 7, None, None, 10))
# 15 7 11
# / \ / \ / \
# 10 11 --> 10 11 --> 10 7
# / \ / /
# 6 7 6 6
heap.delete_root()
self.assertTrue(test_binary_node(heap.root, 11, 10, 7, None))
self.assertTrue(test_binary_node(heap.root.left, 10, 6, None, 11))
self.assertTrue(test_binary_node(heap.root.right, 7, None, None, 11))
self.assertTrue(test_binary_node(heap.root.left.left, 6, None, None, 10))
# 11 6 10
# / \ / \ / \
# 10 7 --> 10 7 --> 6 7
# /
# 6
heap.delete_root()
self.assertTrue(test_binary_node(heap.root, 10, 6, 7, None))
self.assertTrue(test_binary_node(heap.root.left, 6, None, None, 10))
self.assertTrue(test_binary_node(heap.root.right, 7, None, None, 10))
# 10 7
# / \ --> /
# 6 7 6
heap.delete_root()
self.assertTrue(test_binary_node(heap.root, 7, 6, None, None))
self.assertTrue(test_binary_node(heap.root.left, 6, None, None, 7))
# 7
# / --> 6
# 6
heap.delete_root()
self.assertTrue(test_binary_node(heap.root, 6, None, None, None))
# 6 --> None
heap.delete_root()
self.assertFalse(heap.root)