def test_LinkedListQueue():
q1 = Queue(implementation='linked_list')
q1.append(1)
assert raises(TypeError, lambda: Queue(implementation='linked_list', items={0, 1}))
q1 = Queue(implementation='linked_list', items = [0, 1])
q1.append(2)
q1.append(3)
assert str(q1) == '[0, 1, 2, 3]'
assert len(q1) == 4
assert q1.popleft().data == 0
assert q1.popleft().data == 1
assert len(q1) == 2
assert q1.popleft().data == 2
assert q1.popleft().data == 3
assert len(q1) == 0
raises(IndexError, lambda: q1.popleft())
q1 = Queue(implementation='linked_list',items=['a',None,type,{}])
assert len(q1) == 4
assert q1.size == 4
front = q1.front
assert front.data == q1.popleft().data
rear = q1.rear
for _ in range(len(q1)-1):
q1.popleft()
assert rear.data == q1.popleft().data
def test_SinglyCircularLinkedList():
random.seed(1000)
scll = SinglyCircularLinkedList()
assert raises(IndexError, lambda: scll[2])
scll.appendleft(5)
scll.append(1)
scll.appendleft(2)
scll.append(3)
scll.insert_after(scll[1], 4)
scll.insert_after(scll[-1], 6)
scll.insert_at(0, 2)
scll.insert_at(-1, 9)
scll.extract(2)
assert scll.popleft().key == 2
assert scll.popright().key == 6
assert scll.search(-1) is None
scll[-2].key = 0
assert str(scll) == "['2', '4', '1', '0', '9']"
assert len(scll) == 5
assert raises(IndexError, lambda: scll.insert_at(6, None))
assert raises(IndexError, lambda: scll.extract(20))
scll_copy = DoublyCircularLinkedList()
for i in range(scll.size):
scll_copy.append(scll[i])
for i in range(len(scll)):
if i % 2 == 0:
scll.popleft()
else:
scll.popright()
assert str(scll) == "[]"
for _ in range(len(scll_copy)):
index = random.randint(0, len(scll_copy) - 1)
scll_copy.extract(index)
assert str(scll_copy) == "[]"
assert raises(ValueError, lambda: scll_copy.extract(1))
def test_LinkedListStack():
s = Stack(implementation='linked_list')
s.push(1)
s.push(2)
s.push(3)
assert s.peek.key == 3
assert str(s) == ("['(1, None)', '(2, None)', '(3, None)']")
assert s.pop().key == 3
assert s.pop().key == 2
assert s.pop().key == 1
assert s.is_empty is True
assert raises(IndexError, lambda: s.pop())
assert str(s) == '[]'
_s = Stack(implementation='linked_list', items=[1, 2, 3])
assert str(_s) == "['(1, None)', '(2, None)', '(3, None)']"
assert len(_s) == 3
s = Stack(implementation='linked_list', items=['a', None, type, {}])
assert len(s) == 4
assert s.size == 4
peek = s.peek
assert peek.key == s.pop().key
assert raises(TypeError,
lambda: Stack(implementation='linked_list', items={0, 1}))
def test_DoublyLinkedList():
random.seed(1000)
dll = DoublyLinkedList()
assert raises(IndexError, lambda: dll[2])
dll.append_left(5)
dll.append(1)
dll.append_left(2)
dll.append(3)
dll.insert_after(dll[-1], 4)
dll.insert_after(dll[2], 6)
dll.insert_before(dll[4], 1)
dll.insert_before(dll[0], 7)
dll.insert_at(0, 2)
dll.insert_at(-1, 9)
dll.extract(2)
dll.extract(0)
dll.extract(-1)
dll[-2].data = 0
assert str(dll) == "[7, 5, 1, 6, 1, 0, 9]"
assert len(dll) == 7
assert raises(IndexError, lambda: dll.insert_at(8, None))
assert raises(IndexError, lambda: dll.extract(20))
dll_copy = copy.deepcopy(dll)
for i in range(len(dll)):
if i % 2 == 0:
dll.pop_left()
else:
dll.pop_right()
assert str(dll) == "[]"
for _ in range(len(dll_copy)):
index = random.randint(0, len(dll_copy) - 1)
dll_copy.extract(index)
assert str(dll_copy) == "[]"
assert raises(ValueError, lambda: dll_copy.extract(1))
def test_SinglyLinkedList():
random.seed(1000)
sll = SinglyLinkedList()
assert raises(IndexError, lambda: sll[2])
sll.append_left(5)
sll.append(1)
sll.append_left(2)
sll.append(3)
sll.insert_after(sll[1], 4)
sll.insert_after(sll[-1], 6)
sll.insert_at(0, 2)
sll.insert_at(-1, 9)
sll.extract(2)
sll.extract(0)
sll.extract(-1)
sll[-2].data = 0
assert str(sll) == "[2, 4, 1, 0, 9]"
assert len(sll) == 5
assert raises(IndexError, lambda: sll.insert_at(6, None))
assert raises(IndexError, lambda: sll.extract(20))
sll_copy = copy.deepcopy(sll)
for i in range(len(sll)):
if i % 2 == 0:
sll.pop_left()
else:
sll.pop_right()
assert str(sll) == "[]"
for _ in range(len(sll_copy)):
index = random.randint(0, len(sll_copy) - 1)
sll_copy.extract(index)
assert str(sll_copy) == "[]"
assert raises(ValueError, lambda: sll_copy.extract(1))
def test_AdjacencyMatrix():
v_0 = AdjacencyMatrixGraphNode(0, 0)
v_1 = AdjacencyMatrixGraphNode(1, 1)
v_2 = AdjacencyMatrixGraphNode(2, 2)
g = Graph(v_0, v_1, v_2)
g.add_edge(0, 1, 0)
g.add_edge(1, 2, 0)
g.add_edge(2, 0, 0)
e1 = g.get_edge(0, 1)
e2 = g.get_edge(1, 2)
e3 = g.get_edge(2, 0)
assert (e1.source.name, e1.target.name) == ('0', '1')
assert (e2.source.name, e2.target.name) == ('1', '2')
assert (e3.source.name, e3.target.name) == ('2', '0')
assert g.is_adjacent(0, 1) is True
assert g.is_adjacent(1, 2) is True
assert g.is_adjacent(2, 0) is True
assert g.is_adjacent(1, 0) is False
assert g.is_adjacent(2, 1) is False
assert g.is_adjacent(0, 2) is False
neighbors = g.neighbors(0)
assert neighbors == [v_1]
g.remove_edge(0, 1)
assert g.is_adjacent(0, 1) is False
assert raises(ValueError, lambda: g.add_edge('u', 'v'))
assert raises(ValueError, lambda: g.add_edge('v', 'x'))
assert raises(ValueError, lambda: g.add_edge(2, 3))
assert raises(ValueError, lambda: g.add_edge(3, 2))
def test_BinarySearchTree():
BST = BinarySearchTree
b = BST(8, 8)
b.insert(3, 3)
b.insert(10, 10)
b.insert(1, 1)
b.insert(6, 6)
b.insert(4, 4)
b.insert(7, 7)
b.insert(14, 14)
b.insert(13, 13)
assert str(b) == \
("[(1, 8, 8, 2), (3, 3, 3, 4), (None, 10, 10, 7), (None, 1, 1, None), "
"(5, 6, 6, 6), (None, 4, 4, None), (None, 7, 7, None), (8, 14, 14, None), "
"(None, 13, 13, None)]")
assert b.search(10) == 2
assert b.search(-1) == None
assert b.delete(13) == True
assert b.search(13) == None
assert b.delete(10) == True
assert b.search(10) == None
assert b.delete(3) == True
assert b.search(3) == None
assert b.delete(13) == None
assert str(b) == \
("[(1, 8, 8, 7), (3, 4, 4, 4), (None, 10, 10, 7), (None, 1, 1, None), "
"(None, 6, 6, 6), (None, 4, 4, None), (None, 7, 7, None), (None, 14, 14, None), "
"(None, 13, 13, None)]")
bc = BST(1, 1)
assert bc.insert(1, 2) == None
raises(ValueError, lambda: BST(root_data=6))
def test_ArrayQueue():
q1 = Queue()
raises(IndexError, lambda: q1.popleft())
q1 = Queue(implementation='array', items=[0])
q1.append(1)
q1.append(2)
q1.append(3)
assert str(q1) == '[0, 1, 2, 3]'
assert len(q1) == 4
assert q1.popleft() == 0
assert q1.popleft() == 1
assert len(q1) == 2
assert q1.popleft() == 2
assert q1.popleft() == 3
assert len(q1) == 0
q2 = Queue(implementation='array', items=[0], double_ended=True)
q2.append(1)
q2.append(2)
q2.appendleft(3)
assert str(q2) == '[3, 0, 1, 2]'
assert len(q2) == 4
assert q2.popleft() == 3
assert q2.pop() == 2
assert len(q2) == 2
assert q2.popleft() == 0
assert q2.pop() == 1
assert len(q2) == 0
q1 = Queue(implementation='array', items=[0])
assert raises(NotImplementedError, lambda: q1.appendleft(2))
def test_BinomialTree():
assert raises(TypeError, lambda: BinomialTree(1, 1))
assert raises(TypeError, lambda: BinomialTree(None, 1.5))
bt = BinomialTree()
assert raises(TypeError, lambda: bt.add_sub_tree(None))
bt1 = BinomialTree(BinomialTreeNode(1, 1), 0)
node = BinomialTreeNode(2, 2)
node.add_children(BinomialTreeNode(3, 3))
bt2 = BinomialTree(node, 1)
assert raises(ValueError, lambda: bt1.add_sub_tree(bt2))
assert bt1.is_empty is False
def test_MultiDimensionalArray():
assert raises(ValueError, lambda: MultiDimensionalArray(int, 2, -1, 3))
assert MultiDimensionalArray(int, 10).shape == (10, )
array = MultiDimensionalArray(int, 5, 9, 3, 8)
assert array.shape == (5, 9, 3, 8)
array.fill(5)
array[1, 3, 2, 5] = 2.0
assert array
assert array[1, 3, 2, 5] == 2.0
assert array[1, 3, 0, 5] == 5
assert array[1, 2, 2, 5] == 5
assert array[2, 3, 2, 5] == 5
assert raises(IndexError, lambda: array[5])
assert raises(IndexError, lambda: array[4, 10])
assert raises(IndexError, lambda: array[-1])
assert raises(IndexError, lambda: array[2, 3, 2, 8])
assert raises(ValueError, lambda: MultiDimensionalArray())
assert raises(ValueError, lambda: MultiDimensionalArray(int))
assert raises(TypeError, lambda: MultiDimensionalArray(int, 5, 6, ""))
array = MultiDimensionalArray(int, 3, 2, 2)
array.fill(1)
array[0, 0, 0] = 0
array[0, 0, 1] = 0
array[1, 0, 0] = 0
array[2, 1, 1] = 0
assert str(array) == '[0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0]'
array = MultiDimensionalArray(int, 4)
assert array.shape == (4, )
array.fill(5)
array[3] = 3
assert array[3] == 3
def test_ArrayQueue():
q1 = Queue()
raises(IndexError, lambda: q1.popleft())
q1 = Queue(implementation='array', items=[0])
q1.append(1)
q1.append(2)
q1.append(3)
assert str(q1) == '[0, 1, 2, 3]'
assert len(q1) == 4
assert q1.popleft() == 0
assert q1.popleft() == 1
assert len(q1) == 2
assert q1.popleft() == 2
assert q1.popleft() == 3
assert len(q1) == 0
def test_Stack():
s = Stack()
s.push(1)
s.push(2)
s.push(3)
assert s.peek == 3
assert str(s) == '[1, 2, 3]'
assert s.pop() == 3
assert s.pop() == 2
assert s.pop() == 1
assert s.is_empty is True
assert raises(ValueError, lambda : s.pop())
_s = Stack(items=[1, 2, 3])
assert str(_s) == '[1, 2, 3]'
assert raises(NotImplementedError, lambda: Stack(implementation=''))
def _test_shortest_paths(ds, algorithm):
import pydatastructs.utils.misc_util as utils
GraphNode = getattr(utils, "Adjacency" + ds + "GraphNode")
vertices = [GraphNode('S'), GraphNode('C'),
GraphNode('SLC'), GraphNode('SF'),
GraphNode('D')]
graph = Graph(*vertices)
graph.add_edge('S', 'SLC', 2)
graph.add_edge('C', 'S', 4)
graph.add_edge('C', 'D', 2)
graph.add_edge('SLC', 'C', 2)
graph.add_edge('SLC', 'D', 3)
graph.add_edge('SF', 'SLC', 2)
graph.add_edge('SF', 'S', 2)
graph.add_edge('D', 'SF', 3)
dist, pred = shortest_paths(graph, algorithm, 'SLC')
assert dist == {'S': 6, 'C': 2, 'SLC': 0, 'SF': 6, 'D': 3}
assert pred == {'S': 'C', 'C': 'SLC', 'SLC': None, 'SF': 'D', 'D': 'SLC'}
dist, pred = shortest_paths(graph, algorithm, 'SLC', 'SF')
assert dist == 6
assert pred == {'S': 'C', 'C': 'SLC', 'SLC': None, 'SF': 'D', 'D': 'SLC'}
graph.remove_edge('SLC', 'D')
graph.add_edge('D', 'SLC', -10)
assert raises(ValueError, lambda: shortest_paths(graph, 'bellman_ford', 'SLC'))
def test_matrix_multiply_parallel():
ODA = OneDimensionalArray
expected_result = [[3, 3, 3], [1, 2, 1], [2, 2, 2]]
I = ODA(ODA,
[ODA(int, [1, 1, 0]),
ODA(int, [0, 1, 0]),
ODA(int, [0, 0, 1])])
J = ODA(ODA,
[ODA(int, [2, 1, 2]),
ODA(int, [1, 2, 1]),
ODA(int, [2, 2, 2])])
output = matrix_multiply_parallel(I, J, num_threads=5)
assert expected_result == output
I = [[1, 1, 0], [0, 1, 0], [0, 0, 1]]
J = [[2, 1, 2], [1, 2, 1], [2, 2, 2]]
output = matrix_multiply_parallel(I, J, num_threads=5)
assert expected_result == output
I = [[1, 1, 0, 1], [0, 1, 0, 1], [0, 0, 1, 1]]
J = [[2, 1, 2], [1, 2, 1], [2, 2, 2]]
assert raises(ValueError,
lambda: matrix_multiply_parallel(I, J, num_threads=5))
I = [[1, 1, 0], [0, 1, 0], [0, 0, 1]]
J = [[2, 1, 2], [1, 2, 1], [2, 2, 2]]
output = matrix_multiply_parallel(I, J, num_threads=1)
assert expected_result == output
def test_LinkedListQueue():
q1 = Queue(implementation='linked_list')
q1.append(1)
assert raises(TypeError,
lambda: Queue(implementation='linked_list', items={0, 1}))
q1 = Queue(implementation='linked_list', items=[0, 1])
q1.append(2)
q1.append(3)
assert str(q1) == ("['(0, None)', '(1, None)', "
"'(2, None)', '(3, None)']")
assert len(q1) == 4
assert q1.popleft().key == 0
assert q1.popleft().key == 1
assert len(q1) == 2
assert q1.popleft().key == 2
assert q1.popleft().key == 3
assert len(q1) == 0
raises(IndexError, lambda: q1.popleft())
q1 = Queue(implementation='linked_list', items=['a', None, type, {}])
assert len(q1) == 4
front = q1.front
assert front.key == q1.popleft().key
rear = q1.rear
for _ in range(len(q1) - 1):
q1.popleft()
assert rear.key == q1.popleft().key
q1 = Queue(implementation='linked_list', double_ended=True)
q1.appendleft(1)
q2 = Queue(implementation='linked_list', items=[0, 1])
assert raises(NotImplementedError, lambda: q2.appendleft(1))
q1 = Queue(implementation='linked_list', items=[0, 1], double_ended=True)
q1.appendleft(2)
q1.append(3)
assert str(q1) == "['(2, None)', '(0, None)', '(1, None)', '(3, None)']"
assert len(q1) == 4
assert q1.popleft().key == 2
assert q1.pop().key == 3
assert len(q1) == 2
assert q1.pop().key == 1
assert q1.popleft().key == 0
assert len(q1) == 0
assert raises(IndexError, lambda: q1.popleft())
def test_Queue():
q = Queue(implementation='array')
q1 = Queue()
assert _check_type(q, ArrayQueue) is True
assert _check_type(q1, ArrayQueue) is True
q2 = Queue(implementation='linked_list')
assert _check_type(q2, LinkedListQueue) is True
assert raises(NotImplementedError, lambda: Queue(implementation=''))
def test_Stack():
s = Stack(implementation='array')
s1 = Stack()
assert _check_type(s, ArrayStack) is True
assert _check_type(s1, ArrayStack) is True
s2 = Stack(implementation='linked_list')
assert _check_type(s2, LinkedListStack) is True
assert raises(NotImplementedError, lambda: Stack(implementation=''))
def test_DHeap():
assert raises(ValueError, lambda: DHeap(heap_property="none", d=4))
max_heap = DHeap(heap_property="max", d=5)
assert raises(IndexError, lambda: max_heap.extract())
max_heap.insert(100, 100)
max_heap.insert(19, 19)
max_heap.insert(36, 36)
max_heap.insert(17, 17)
max_heap.insert(3, 3)
max_heap.insert(25, 25)
max_heap.insert(1, 1)
max_heap = DHeap(max_heap.heap, heap_property="max", d=4)
max_heap.insert(2, 2)
max_heap.insert(7, 7)
assert str(max_heap) == \
('[(100, 100, [1, 2, 3, 4]), (25, 25, [5, 6, 7, 8]), '
'(36, 36, []), (17, 17, []), (3, 3, []), (19, 19, []), '
'(1, 1, []), (2, 2, []), (7, 7, [])]')
assert max_heap.extract().key == 100
expected_sorted_elements = [36, 25, 19, 17, 7, 3, 2, 1]
sorted_elements = []
for _ in range(8):
sorted_elements.append(max_heap.extract().key)
assert expected_sorted_elements == sorted_elements
elements = [
TreeNode(7, 7),
TreeNode(25, 25),
TreeNode(100, 100),
TreeNode(1, 1),
TreeNode(2, 2),
TreeNode(3, 3),
TreeNode(17, 17),
TreeNode(19, 19),
TreeNode(36, 36)
]
min_heap = DHeap(elements=DynamicOneDimensionalArray(
TreeNode, 9, elements),
heap_property="min")
assert min_heap.extract().key == 1
expected_sorted_elements = [2, 3, 7, 17, 19, 25, 36, 100]
sorted_elements = [min_heap.extract().key for _ in range(8)]
assert expected_sorted_elements == sorted_elements
def test_BinaryTreeTraversal():
BST = BinarySearchTree
BTT = BinaryTreeTraversal
b = BST('F', 'F')
b.insert('B', 'B')
b.insert('A', 'A')
b.insert('G', 'G')
b.insert('D', 'D')
b.insert('C', 'C')
b.insert('E', 'E')
b.insert('I', 'I')
b.insert('H', 'H')
trav = BTT(b)
pre = trav.depth_first_search(order='pre_order')
assert [str(n) for n in pre] == \
["(1, 'F', 'F', 3)", "(2, 'B', 'B', 4)", "(None, 'A', 'A', None)",
"(5, 'D', 'D', 6)", "(None, 'C', 'C', None)", "(None, 'E', 'E', None)",
"(None, 'G', 'G', 7)", "(8, 'I', 'I', None)", "(None, 'H', 'H', None)"]
ino = trav.depth_first_search()
assert [str(n) for n in ino] == \
["(None, 'A', 'A', None)", "(2, 'B', 'B', 4)", "(None, 'C', 'C', None)",
"(5, 'D', 'D', 6)", "(None, 'E', 'E', None)", "(1, 'F', 'F', 3)",
"(None, 'G', 'G', 7)", "(None, 'H', 'H', None)", "(8, 'I', 'I', None)"]
out = trav.depth_first_search(order='out_order')
assert [str(n) for n in out] == \
["(8, 'I', 'I', None)", "(None, 'H', 'H', None)", "(None, 'G', 'G', 7)",
"(1, 'F', 'F', 3)", "(None, 'E', 'E', None)", "(5, 'D', 'D', 6)",
"(None, 'C', 'C', None)", "(2, 'B', 'B', 4)", "(None, 'A', 'A', None)"]
post = trav.depth_first_search(order='post_order')
assert [str(n) for n in post] == \
["(None, 'A', 'A', None)", "(None, 'C', 'C', None)",
"(None, 'E', 'E', None)", "(5, 'D', 'D', 6)", "(2, 'B', 'B', 4)",
"(None, 'H', 'H', None)", "(8, 'I', 'I', None)", "(None, 'G', 'G', 7)",
"(1, 'F', 'F', 3)"]
bfs = trav.breadth_first_search()
assert [str(n) for n in bfs] == \
["(1, 'F', 'F', 3)", "(2, 'B', 'B', 4)", "(None, 'G', 'G', 7)",
"(None, 'A', 'A', None)", "(5, 'D', 'D', 6)", "(8, 'I', 'I', None)",
"(None, 'C', 'C', None)", "(None, 'E', 'E', None)",
"(None, 'H', 'H', None)"]
assert raises(NotImplementedError,
lambda: trav.breadth_first_search(strategy='iddfs'))
assert raises(NotImplementedError,
lambda: trav.depth_first_search(order='in_out_order'))
assert raises(TypeError, lambda: BTT(1))
def test_Queue():
q1 = Queue(implementation='array', items=[0])
q1.append(1)
q1.append(2)
q1.append(3)
assert str(q1) == '[0, 1, 2, 3]'
assert len(q1) == 4
assert q1.popleft() == 0
assert q1.popleft() == 1
assert len(q1) == 2
assert q1.popleft() == 2
assert q1.popleft() == 3
assert len(q1) == 0
q1 = Queue()
raises(ValueError, lambda: q1.popleft())
q1 = Queue(implementation='linkedlist')
q1.append(1)
assert raises(TypeError, lambda: q1.append('a'))
assert raises(TypeError, lambda: Queue(implementation='linkedlist', items=[0], dtype=str))
assert raises(TypeError, lambda: Queue(implementation='linkedlist', items={0, 1}))
q1 = Queue(implementation='linkedlist', items = [0, 1])
q1.append(2)
q1.append(3)
assert str(q1) == '[0, 1, 2, 3]'
assert len(q1) == 4
assert q1.popleft().data == 0
assert q1.popleft().data == 1
assert len(q1) == 2
assert q1.popleft().data == 2
assert q1.popleft().data == 3
assert len(q1) == 0
raises(ValueError, lambda: q1.popleft())
def test_OneDimensionalSegmentTree():
ODST = OneDimensionalSegmentTree
segt = ODST([(0, 5), (1, 6), (9, 13), (1, 2), (3, 8), (9, 20)])
assert segt.cache == False
segt2 = ODST([(1, 4)])
assert str(segt2) == (
"[(None, [False, 0, 1, False], None, None), "
"(None, [True, 1, 1, True], ['(None, [True, 1, 4, True], None, None)'], "
"None), (None, [False, 1, 4, False], None, None), (None, [True, 4, 4, True], "
"None, None), (0, [False, 0, 1, True], None, 1), (2, [False, 1, 4, True], "
"['(None, [True, 1, 4, True], None, None)'], 3), (4, [False, 0, 4, True], "
"None, 5), (None, [False, 4, 5, False], None, None), (-3, [False, 0, 5, "
"False], None, -2)]")
assert len(segt.query(1.5)) == 3
assert segt.cache == True
assert len(segt.query(-1)) == 0
assert len(segt.query(2.8)) == 2
raises(ValueError, lambda: ODST([(1, 2, 3)]))
def test_Stack():
s = Stack()
s.push(1)
s.push(2)
s.push(3)
assert s.peek == 3
assert str(s) == '[1, 2, 3]'
assert s.pop() == 3
assert s.pop() == 2
assert s.pop() == 1
assert s.is_empty is True
assert raises(IndexError, lambda : s.pop())
_s = Stack(items=[1, 2, 3])
assert str(_s) == '[1, 2, 3]'
assert len(_s) == 3
assert raises(NotImplementedError, lambda: Stack(implementation=''))
s = Stack(implementation='linked_list')
s.push(1)
s.push(2)
s.push(3)
assert s.peek == 3
assert str(s) == '[3, 2, 1]'
assert s.pop().data == 3
assert s.pop().data == 2
assert s.pop().data == 1
assert s.is_empty is True
assert raises(IndexError, lambda : s.pop())
_s = Stack(implementation='linked_list',items=[1, 2, 3])
assert str(_s) == '[3, 2, 1]'
assert len(_s) == 3
s = Stack(implementation='linked_list',items=['a',None,type,{}])
assert len(s) == 4
assert s.size == 4
top = s.top
assert top.data == s.pop().data
peek = s.peek
assert peek == s.pop().data
assert raises(TypeError, lambda: Stack(implementation='linked_list', items={0, 1}))
def test_ImplementationPriorityQueue():
impls = ['linked_list', 'binomial_heap', 'binary_heap']
for impl in impls:
pq1 = PriorityQueue(implementation=impl)
pq1.push(1, 2)
pq1.push(2, 3)
pq1.push(3, 4)
assert pq1.pop() == 1
assert pq1.pop() == 2
assert pq1.pop() == 3
assert pq1.is_empty is True
assert raises(IndexError, lambda: pq1.pop())
def test_adjacency_list():
v_1 = AdjacencyListGraphNode('v_1', 1)
v_2 = AdjacencyListGraphNode('v_2', 2)
g = Graph(v_1, v_2, implementation='adjacency_list')
v_3 = AdjacencyListGraphNode('v_3', 3)
g.add_vertex(v_2)
g.add_vertex(v_3)
g.add_edge('v_1', 'v_2')
g.add_edge('v_2', 'v_3')
g.add_edge('v_3', 'v_1')
assert g.is_adjacent('v_1', 'v_2') is True
assert g.is_adjacent('v_2', 'v_3') is True
assert g.is_adjacent('v_3', 'v_1') is True
assert g.is_adjacent('v_2', 'v_1') is False
assert g.is_adjacent('v_3', 'v_2') is False
assert g.is_adjacent('v_1', 'v_3') is False
neighbors = g.neighbors('v_1')
assert neighbors == [v_2]
v = AdjacencyListGraphNode('v', 4)
g.add_vertex(v)
g.add_edge('v_1', 'v', 0)
g.add_edge('v_2', 'v', 0)
g.add_edge('v_3', 'v', 0)
assert g.is_adjacent('v_1', 'v') is True
assert g.is_adjacent('v_2', 'v') is True
assert g.is_adjacent('v_3', 'v') is True
e1 = g.get_edge('v_1', 'v')
e2 = g.get_edge('v_2', 'v')
e3 = g.get_edge('v_3', 'v')
assert (e1.source.name, e1.target.name) == ('v_1', 'v')
assert (e2.source.name, e2.target.name) == ('v_2', 'v')
assert (e3.source.name, e3.target.name) == ('v_3', 'v')
g.remove_edge('v_1', 'v')
assert g.is_adjacent('v_1', 'v') is False
g.remove_vertex('v')
assert g.is_adjacent('v_2', 'v') is False
assert g.is_adjacent('v_3', 'v') is False
assert raises(ValueError, lambda: g.add_edge('u', 'v'))
assert raises(ValueError, lambda: g.add_edge('v', 'x'))
def test_DoublyLinkedList():
random.seed(1000)
dll = DoublyLinkedList()
assert raises(IndexError, lambda: dll[2])
dll.appendleft(5)
dll.append(1)
dll.appendleft(2)
dll.append(3)
dll.insert_after(dll[-1], 4)
dll.insert_after(dll[2], 6)
dll.insert_before(dll[4], 1.1)
dll.insert_before(dll[0], 7)
dll.insert_at(0, 2)
dll.insert_at(-1, 9)
dll.extract(2)
assert dll.popleft().key == 2
assert dll.popright().key == 4
assert dll.search(3) == dll[-2]
assert dll.search(-1) is None
dll[-2].key = 0
assert str(dll) == ("['(7, None)', '(5, None)', '(1, None)', "
"'(6, None)', '(1.1, None)', '(0, None)', "
"'(9, None)']")
assert len(dll) == 7
assert raises(IndexError, lambda: dll.insert_at(8, None))
assert raises(IndexError, lambda: dll.extract(20))
dll_copy = DoublyCircularLinkedList()
for i in range(dll.size):
dll_copy.append(dll[i])
for i in range(len(dll)):
if i % 2 == 0:
dll.popleft()
else:
dll.popright()
assert str(dll) == "[]"
for _ in range(len(dll_copy)):
index = random.randint(0, len(dll_copy) - 1)
dll_copy.extract(index)
assert str(dll_copy) == "[]"
assert raises(ValueError, lambda: dll_copy.extract(1))
def _test_RangeQueryStatic_common(func, gen_expected):
array = OneDimensionalArray(int, [])
raises(ValueError, lambda: RangeQueryStatic(array, func))
array = OneDimensionalArray(int, [1])
rq = RangeQueryStatic(array, func)
assert rq.query(0, 0) == 1
raises(ValueError, lambda: rq.query(0, -1))
raises(IndexError, lambda: rq.query(0, 1))
array_sizes = [3, 6, 12, 24, 48, 96]
random.seed(0)
for array_size in array_sizes:
data = random.sample(range(-2 * array_size, 2 * array_size),
array_size)
array = OneDimensionalArray(int, data)
expected = []
inputs = []
for i in range(array_size):
for j in range(i + 1, array_size):
inputs.append((i, j))
expected.append(gen_expected(data, i, j))
data_structures = ["array", "sparse_table"]
for ds in data_structures:
rmq = RangeQueryStatic(array, func, data_structure=ds)
for input, correct in zip(inputs, expected):
assert rmq.query(input[0], input[1]) == correct
def test_BinaryTreeTraversal():
BST = BinarySearchTree
BTT = BinaryTreeTraversal
b = BST('F', 'F')
b.insert('B', 'B')
b.insert('A', 'A')
b.insert('G', 'G')
b.insert('D', 'D')
b.insert('C', 'C')
b.insert('E', 'E')
b.insert('I', 'I')
b.insert('H', 'H')
trav = BTT(b)
pre = trav.depth_first_search(order='pre_order')
assert [node.key
for node in pre] == ['F', 'B', 'A', 'D', 'C', 'E', 'G', 'I', 'H']
ino = trav.depth_first_search()
assert [node.key
for node in ino] == ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I']
out = trav.depth_first_search(order='out_order')
assert [node.key
for node in out] == ['I', 'H', 'G', 'F', 'E', 'D', 'C', 'B', 'A']
post = trav.depth_first_search(order='post_order')
assert [node.key
for node in post] == ['A', 'C', 'E', 'D', 'B', 'H', 'I', 'G', 'F']
bfs = trav.breadth_first_search()
assert [node.key
for node in bfs] == ['F', 'B', 'G', 'A', 'D', 'I', 'C', 'E', 'H']
assert raises(NotImplementedError,
lambda: trav.breadth_first_search(strategy='iddfs'))
assert raises(NotImplementedError,
lambda: trav.depth_first_search(order='in_out_order'))
assert raises(TypeError, lambda: BTT(1))
def test_OneDimensionalArray():
ODA = OneDimensionalArray
A = ODA(int, 5, [1.0, 2, 3, 4, 5], init=6)
A[1] = 2.0
assert A
assert ODA(int, [1.0, 2, 3, 4, 5], 5)
assert ODA(int, 5)
assert ODA(int, [1.0, 2, 3])
assert raises(IndexError, lambda: A[7])
assert raises(IndexError, lambda: A[-1])
assert raises(ValueError, lambda: ODA())
assert raises(ValueError, lambda: ODA(int, 1, 2, 3))
assert raises(TypeError, lambda: ODA(int, 5.0, set([1, 2, 3])))
assert raises(TypeError, lambda: ODA(int, 5.0))
assert raises(TypeError, lambda: ODA(int, set([1, 2, 3])))
assert raises(ValueError, lambda: ODA(int, 3, [1]))
def test_AdjacencyListGraphNode():
g_1 = AdjacencyListGraphNode('g_1', 1)
g_2 = AdjacencyListGraphNode('g_2', 2)
g = AdjacencyListGraphNode('g', 0, adjacency_list=[g_1, g_2])
g.add_adjacent_node('g_3', 3)
assert g.g_1.name == 'g_1'
assert g.g_2.name == 'g_2'
assert g.g_3.name == 'g_3'
g.remove_adjacent_node('g_3')
assert hasattr(g, 'g_3') is False
assert raises(ValueError, lambda: g.remove_adjacent_node('g_3'))
g.add_adjacent_node('g_1', 4)
assert g.g_1.data == 4
assert str(g) == "('g', 0)"
def test_DoublyCircularLinkedList():
random.seed(1000)
dcll = DoublyCircularLinkedList()
assert raises(IndexError, lambda: dcll[2])
dcll.appendleft(5)
dcll.append(1)
dcll.appendleft(2)
dcll.append(3)
dcll.insert_after(dcll[-1], 4)
dcll.insert_after(dcll[2], 6)
dcll.insert_before(dcll[4], 1)
dcll.insert_before(dcll[0], 7)
dcll.insert_at(0, 2)
dcll.insert_at(-1, 9)
dcll.extract(2)
assert dcll.popleft().key == 2
assert dcll.popright().key == 4
dcll[-2].key = 0
assert str(dcll) == "['7', '5', '1', '6', '1', '0', '9']"
assert len(dcll) == 7
assert raises(IndexError, lambda: dcll.insert_at(8, None))
assert raises(IndexError, lambda: dcll.extract(20))
dcll_copy = DoublyCircularLinkedList()
for i in range(dcll.size):
dcll_copy.append(dcll[i])
for i in range(len(dcll)):
if i % 2 == 0:
dcll.popleft()
else:
dcll.popright()
assert str(dcll) == "[]"
for _ in range(len(dcll_copy)):
index = random.randint(0, len(dcll_copy) - 1)
dcll_copy.extract(index)
assert str(dcll_copy) == "[]"
assert raises(ValueError, lambda: dcll_copy.extract(1))
