def test_left(self):
self.subject.root = Node(80)
self.subject.root.left = Node(30)
result = self.subject.traverse(mode='postorder')
self.assertEqual([30, 80], result)
def test_left(self):
self.subject.root = Node(100)
self.subject.root.left = Node(50)
result = self.subject.search(50)
self.assertEqual(Node(50), result)
def test_in():
root = Node(1)
root.insert(2)
root.insert(3)
assert (0 in root) == False
assert (1 in root) == True
assert (3 in root) == True
def test_right(self):
self.subject.root = Node(100)
self.subject.root.right = Node(150)
result = self.subject.search(150)
self.assertEqual(Node(150), result)
def test_bst_left_setter_child():
"""test that left child setter works"""
from bst import Node
node1 = Node(9)
node2 = Node(7)
node1.left = node2
assert node1.left.val == node2.val
def test_right(self):
self.subject.root = Node(80)
self.subject.root.right = Node(100)
result = self.subject.traverse(mode='level_order')
self.assertEqual([80, 100], result)
def test_bst_right_setter_parent():
"""test that right child setter sets parent"""
from bst import Node
node1 = Node(7)
node2 = Node(9)
node1.right = node2
assert node2.parent.val == node1.val
def test_bst_right_setter_child():
"""test rigth child setter works"""
from bst import Node
node1 = Node(7)
node2 = Node(9)
node1.right = node2
assert node1.right.val == node2.val
def test_bst_parent_setter_child_parent():
"""test parent setter works properly"""
from bst import Node
node1 = Node(1)
node2 = Node(2)
node2.parent = node1
assert node1.val == node2.parent.val
def test_left(self):
self.subject.root = Node(80)
self.subject.root.left = Node(30)
result = self.subject.traverse(mode='level_order')
self.assertEqual([80, 30], result)
def test_bst_parent_setter_parent_child_left():
"""test that parent setter sets child left properly"""
from bst import Node
node1 = Node(2)
node2 = Node(1)
node2.parent = node1
assert node1.left.val == node2.val
def test_height_one(self):
self.subject.root = Node(5)
self.subject.root.right = Node(8)
result = self.subject.calculate_height()
self.assertEqual(1, result)
def test_right(self):
self.subject.root = Node(80)
self.subject.root.right = Node(100)
result = self.subject.traverse(mode='postorder')
self.assertEqual([100, 80], result)
def is_size_consistent(current):
if current is None: return True
if current.count != 1 + Node.size(current.left) + \
Node.size(current.right):
return False
return is_size_consistent(current.left) and \
is_size_consistent(current.right)
def test_bst_del_right_child():
"""test deleter on right child"""
from bst import Node
node1 = Node(7)
node2 = Node(9)
node1.right = node2
del node1.right
assert node1.right is None
def test_find():
root = Node(1)
root.insert(2)
root.insert(-5)
assert root.find(1) is root
assert root.find(100) is None
assert root.find(2) is root.right
assert root.find(-5) is root.left
def test_left_subtree(self):
self.subject.root = Node(5)
self.subject.root.left = Node(4)
self.subject.root.left.left = Node(3)
result = self.subject.traverse(mode='level_order')
self.assertEqual([5, 4, 3], result)
def test_right_subtree(self):
self.subject.root = Node(3)
self.subject.root.right = Node(4)
self.subject.root.right.right = Node(5)
result = self.subject.traverse(mode='level_order')
self.assertEqual([3, 4, 5], result)
def _create_min_bst(self, array, start, end):
if end < start:
return None
mid = (start + end) // 2
node = Node(array[mid])
node.left = self._create_min_bst(array, start, mid - 1)
node.right = self._create_min_bst(array, mid + 1, end)
return node
def test_bst_del_left_child():
"""test deleter on left child"""
from bst import Node
node1 = Node(9)
node2 = Node(7)
node1.left = node2
del node1.left
assert node1.left is None
def test_rotate_left():
from bst import Node
node1 = Node()
node2 = Node()
node2.right = node1
node1.rotate_right()
assert node1.right == node2
assert not node2.left
def test_init(self):
node1 = Node(5)
node2 = Node(4)
assert (node1.data == 5)
assert (node1.left == None)
assert (node1.right == None)
assert (node2.data == 4)
assert (node2.left == None)
assert (node2.right == None)
def test_bst_init_node_has_right(empty_bst):
"""test Node picks up arguments and has_right_child == that input"""
from bst import Node
a = Node(empty_bst.input_val,
empty_bst.input_val,
empty_bst.input_val,
empty_bst.input_val
)
assert a.has_right_child() == empty_bst.input_val
def balanced_bst_from_sorted_array(arr, start, end):
if start > end:
return
mid = (start + end) / 2
root = Node(arr[mid])
root.left = balanced_bst_from_sorted_array(arr, start, mid - 1)
root.right = balanced_bst_from_sorted_array(arr, mid + 1, end)
return root
def inordersearch(lroot, mroot):
arr = []
if lroot:
arr = arr + inordersearch(lroot.left, mroot)
if lroot.val != None and Node.search(
mroot, lroot.val) != None and Node.search(mroot,
lroot.val) != mroot:
arr.append(lroot.val)
arr = arr + inordersearch(lroot.right, mroot)
return arr
def __clone(node):
if not node:
return
new_root = Node(node.key, node.data)
new_left = __clone(node.left)
new_right = __clone(node.right)
new_root.left = new_left
new_root.right = new_right
return new_root
def test_uneven_tree(self):
self.subject.root = Node(10)
self.subject.root.left = Node(8)
self.subject.root.right = Node(12)
self.subject.root.left.right = Node(9)
self.subject.root.right.left = Node(11)
result = self.subject.traverse(mode='level_order')
self.assertEqual([10, 8, 12, 9, 11], result)
def test_uneven_tree(self):
self.subject.root = Node(10)
self.subject.root.left = Node(8)
self.subject.root.right = Node(12)
self.subject.root.left.right = Node(9)
self.subject.root.right.left = Node(11)
result = self.subject.traverse(mode='postorder')
self.assertEqual([9, 8, 11, 12, 10], result)
def _sorted_array_to_bst(array, left, right): if left == right: return Node(array[left]) if left > right: return None mid = (left + right) / 2 root = Node(array[mid]) root.left = _sorted_array_to_bst(array, left, mid-1) root.right = _sorted_array_to_bst(array, mid+1, right) return root
def test_Node_depth():
from bst import Node
node1 = Node()
node2 = Node()
node3 = Node()
node4 = Node()
node1.left = node2
node1.right = node3
node3.right = node4
results = [node1.depth, node2.depth, node3.depth]
assert results == [3, 1, 2]
def filled_tree():
A = Node(6)
a = BST()
a.root = A
A.left = 4
A.right = 7
A.left.left = 3
A.left.right = 5
A.right.right = 8
a._size = 6
return a
def build_tree(in_order_list, pre_order_list):
if pre_order_list and in_order_list:
root_val = pre_order_list.pop(0)
root = Node(root_val)
in_order_index = in_order_list.index(root_val)
root.left = build_tree(in_order_list[:in_order_index], pre_order_list)
root.right = build_tree(in_order_list[in_order_index + 1:],
pre_order_list)
return root
else:
return None
def test_init_node(self):
"""
Tests initialization of Node
"""
n1 = Node('data')
self.assertIsInstance(n1, Node)
self.assertEqual(n1.data, 'data')
self.assertIsNone(n1.left)
self.assertIsNone(n1.right)
# make sure 'value' is writeable
n1.data = "new_val"
self.assertEqual(n1.data, 'new_val')
def getFreeHoursInCommon1(a, b):
result = [[] for i in range(period)]
leader = [Node.inorderarr(a[x], [])
for x in range(period)] #without time in common
#leader = [[12, 13, 13.5], [10, 13.5, 15], [13.5, 15], [13.5, 14], [11, 13.5], [13.5], [13.5]] #with time in common
#print(leader)
for i in range(len(leader)):
for j in range(len(leader[i])):
if Node.search(b[i], leader[i][j]) != None and Node.search(
b[i], leader[i][j]) != b[i]:
result[i].append(leader[i][j])
return result
def uneven_tree():
A = Node(6)
a = BST()
a.root = A
A.left = 4
A.right = 7
A.left.left = 3
A.left.right = 5
A.right.right = 8
A.right.right.right = 9
A.right.right.right.right = 10
a._size = 6
return a
def get_results(file):
'''
Pass file name to get result of both Problems.
'''
data,root =process_json_file('{0}'.format(file))
root = Node(root)
for value in data:
root.insert(value['score'])
height = root.maxDepth(root)
unique_value = len(data) + 1 # Since Middle element is removed as root Node.
print "Height of Standard Binary Tree is : {0}".format(height)
print 'Unique dict values are : {0}'.format(unique_value)
def create_tree_1(self):
tree = Node(8)
tree.insert(12)
tree.insert(3)
tree.insert(4) # Change to 7 to simulate a change in testing fixture
tree.insert(6)
return tree
def test_left_rotation_three_nodes():
"""Test that a right-right becomes balanced."""
from bst import Bst, Node
new_bst = Bst()
node1 = Node(10)
node2 = Node(15)
node3 = Node(20)
new_bst.head = node1
node1.right = node2
node2.parent = node1
node2.right = node3
node3.parent = node2
new_bst.head.left_rotation()
assert node2.parent is None
assert node2.left == node1
assert node2.right == node3
assert node2.left.parent == node2
def test_right_left_conversion_three_nodes():
"""
Test that given three nodes in a right-left state converts to right-right.
"""
from bst import Bst, Node
new_bst = Bst()
node1 = Node(10)
node2 = Node(15)
node3 = Node(12)
new_bst.head = node1
node1.right = node2
node2.parent = node1
node2.left = node3
node3.parent = node2
new_bst.head.right_left_conversion()
assert new_bst.head.right == node3
assert new_bst.head.right.right == node2
assert new_bst.head.right.right.parent == node3
assert new_bst.head.right.parent == node1
def test_Node_setting_left():
from bst import Node
node1 = Node()
node2 = Node()
node1.left = node2
assert node1.left == node2
def test_right_left_conversion_six_nodes():
"""
Test that given six nodes in a left-right state converts to left-left.
"""
from bst import Bst, Node
new_bst = Bst()
node1 = Node(10)
node2 = Node(5)
node3 = Node(15)
node4 = Node(20)
node5 = Node(14)
node6 = Node(13)
new_bst.head = node1
node1.left = node2
node2.parent = node1
node1.right = node3
node3.parent = node1
node3.right = node4
node4.parent = node3
node3.left = node5
node5.parent = node3
node5.left = node6
node6.parent = node5
new_bst.head.right_left_conversion()
assert new_bst.head.right == node5
assert new_bst.head.right.right == node3
assert new_bst.head.right.right.right == node4
def test_Node_setting_right():
from bst import Node
node1 = Node()
node2 = Node()
node1.right = node2
assert node1.right == node2
def test_Node_parent():
from bst import Node
node1 = Node()
node2 = Node()
node1.right = node2
assert node2.parent
def test_depth_many():
"""Test that a node with one extra on the left has a depth of 2."""
from bst import Node
a = Node(20)
a.left = Node(16)
assert a.depth() == 2
def test_balance_right():
"""Test that a right side is larger and returns a negative int."""
from bst import Node
a = Node(20)
a.right = Node(23)
assert a.balance() == -1
def test_balance_left():
"""Test that a left side is larger and returns a positive int."""
from bst import Node
a = Node(20)
a.left = Node(18)
assert a.balance() == 1
def node_instance2():
"""Create BST instance."""
from bst import Node
node = Node()
node.val = 7
return node
def test_balance_one():
"""Test that a node of one returns a depth of one."""
from bst import Node
a = Node(1)
assert a.balance() == 0
def test_depth_none():
"""Test that a node of nothing returns a value of nothing."""
from bst import Node
a = Node()
assert a.depth() == 0
def test_balance_none():
"""Test that a node of nothing returns a value of nothing."""
from bst import Node
a = Node()
assert a.balance() == 0
def test_depth_one():
"""Test that a node of one returns a depth of one."""
from bst import Node
a = Node(1)
assert a.depth() == 1