static void Main(string[] args)
{
Console.WriteLine("Hello Breadth First Traversal");
Trees.Classes.Node root = new Trees.Classes.Node(2);
Trees.Classes.Node nodeTwo = new Trees.Classes.Node(4);
Trees.Classes.Node nodeThree = new Trees.Classes.Node(6);
Trees.Classes.Node nodeFour = new Trees.Classes.Node(8);
Trees.Classes.Node nodeFive = new Trees.Classes.Node(10);
Trees.Classes.Node nodeSix = new Trees.Classes.Node(12);
Trees.Classes.Node nodeSeven = new Trees.Classes.Node(14);
Trees.Classes.Node nodeEight = new Trees.Classes.Node(16);
Trees.Classes.Node nodeNine = new Trees.Classes.Node(18);
Trees.Classes.Node nodeTen = new Trees.Classes.Node(21);
BinaryTree breadthTree = new BinaryTree(root);
breadthTree.Root.LeftChild = nodeTwo;
breadthTree.Root.RightChild = nodeThree;
breadthTree.Root.LeftChild.LeftChild = nodeFour;
breadthTree.Root.LeftChild.RightChild = nodeFive;
breadthTree.Root.RightChild.LeftChild = nodeSix;
breadthTree.Root.RightChild.RightChild = nodeSeven;
breadthTree.Root.LeftChild.RightChild.LeftChild = nodeEight;
breadthTree.Root.LeftChild.RightChild.RightChild = nodeNine;
breadthTree.Root.RightChild.RightChild.RightChild = nodeTen;
BreadthFirst(root);
Console.ReadLine();
}
public void TestNoIntersections()
{
// creating nodes
Trees.Classes.Node one = new Trees.Classes.Node(1);
Trees.Classes.Node seven = new Trees.Classes.Node(7);
Trees.Classes.Node ten = new Trees.Classes.Node(10);
Trees.Classes.Node two = new Trees.Classes.Node(2);
one.Left = seven;
seven.Right = ten;
one.Right = two;
BinaryTree bt1 = new BinaryTree(one);
// create second tree
Trees.Classes.Node four2 = new Trees.Classes.Node(4);
Trees.Classes.Node eight2 = new Trees.Classes.Node(8);
Trees.Classes.Node nine2 = new Trees.Classes.Node(9);
four2.Left = eight2;
four2.Right = nine2;
BinaryTree bt2 = new BinaryTree(four2);
Assert.True(TreeIntersection(bt1, bt2).Count == 0);
}
static void Main(string[] args)
{
WriteLine("Creating BT1: 1, 7, 10, 2");
// creating nodes
Trees.Classes.Node one = new Trees.Classes.Node(1);
Trees.Classes.Node seven = new Trees.Classes.Node(7);
Trees.Classes.Node ten = new Trees.Classes.Node(10);
Trees.Classes.Node two = new Trees.Classes.Node(2);
one.Left = seven;
seven.Right = ten;
one.Right = two;
BinaryTree bt1 = new BinaryTree(one);
// create second tree
Trees.Classes.Node two2 = new Trees.Classes.Node(2);
Trees.Classes.Node seven2 = new Trees.Classes.Node(7);
Trees.Classes.Node nine2 = new Trees.Classes.Node(9);
two2.Left = seven2;
two2.Right = nine2;
BinaryTree bt2 = new BinaryTree(two2);
WriteLine("Running tree intersect, should return: 2, 7");
// loops through the returned list to show answer
foreach (string returned in TreeIntersection(bt1, bt2))
{
WriteLine(returned);
}
}
/// <summary>
/// List is used for testing xUnit only.
/// Takes a binary tree through breadthFirst approach.
/// </summary>
/// <param name="Root">Node root</param>
/// <returns>values in breadthFirst order</returns>
public static List <int> BreadthFirst(Trees.Classes.Node Root)
{
List <int> testList = new List <int>();
Queue <Trees.Classes.Node> breadthQueue = new Queue <Trees.Classes.Node>();
breadthQueue.Enqueue(Root);
try
{
while (breadthQueue.Peek() != null)
{
//BinaryTree front = new BinaryTree();
Trees.Classes.Node front = breadthQueue.Dequeue();
Console.WriteLine($"{front.Value}");
testList.Add(front.Value);
if (front.LeftChild != null)
{
breadthQueue.Enqueue(front.LeftChild);
}
if (front.RightChild != null)
{
breadthQueue.Enqueue(front.RightChild);
}
}
return(testList);
}
catch (Exception error)
{
Console.WriteLine($"Now the Queue is empty: {error.Message}");
}
return(testList);
}
public void TreeSizesAreDifferentTest()
{
// Arrange
Trees.Classes.Node n1 = new Trees.Classes.Node(10);
Trees.Classes.Node n2 = new Trees.Classes.Node(20);
Trees.Classes.Node n3 = new Trees.Classes.Node(30);
Trees.Classes.Node n4 = new Trees.Classes.Node(40);
Trees.Classes.Node n5 = new Trees.Classes.Node(50);
Trees.Classes.Node n6 = new Trees.Classes.Node(60);
BinaryTree b1 = new BinaryTree(n1);
b1.Add(n1, n2);
b1.Add(n1, n3);
b1.Add(n1, n4);
b1.Add(n1, n5);
b1.Add(n1, n6);
Trees.Classes.Node n1v2 = new Trees.Classes.Node(20);
Trees.Classes.Node n2v2 = new Trees.Classes.Node(15);
Trees.Classes.Node n3v2 = new Trees.Classes.Node(25);
BinaryTree b2 = new BinaryTree(n1v2);
b1.Add(n1v2, n2v2);
b1.Add(n1v2, n3v2);
// Act
List <int> intersect = Program.TreeIntersection(n1, n1v2);
// Assert
Assert.Equal(20, intersect[0]);
}
/// <summary>
/// This method takes in two tree nodes and returns a list of the values that are the same.
/// </summary>
/// <param name="n1">The node for the first tree</param>
/// <param name="n2">The node for the second tree</param>
/// <returns>A list of same values</returns>
public static List <int> TreeIntersection(Trees.Classes.Node n1, Trees.Classes.Node n2)
{
List <int> answers = new List <int>();
HashTable hashTable = new HashTable();
Queue <Trees.Classes.Node> queue = new Queue <Trees.Classes.Node>();
queue.Enqueue(n1);
while (queue.TryPeek(out n1))
{
Trees.Classes.Node current = queue.Dequeue();
try
{
hashTable.Add(current.Value.ToString(), 1);
}
catch (Exception)
{
answers.Add(current.Value);
}
finally
{
if (current.LeftChild != null)
{
queue.Enqueue(current.LeftChild);
}
if (current.RightChild != null)
{
queue.Enqueue(current.RightChild);
}
}
}
queue.Enqueue(n2);
while (queue.TryPeek(out n2))
{
Trees.Classes.Node current = queue.Dequeue();
try
{
hashTable.Add(current.Value.ToString(), 1);
}
catch (Exception)
{
answers.Add(current.Value);
}
finally
{
if (current.LeftChild != null)
{
queue.Enqueue(current.LeftChild);
}
if (current.RightChild != null)
{
queue.Enqueue(current.RightChild);
}
}
}
return(answers);
}
public void AllTreeValuesTheSameButInDifferentLocationsTest()
{
// Arrange
Trees.Classes.Node n1 = new Trees.Classes.Node(10);
Trees.Classes.Node n2 = new Trees.Classes.Node(20);
Trees.Classes.Node n3 = new Trees.Classes.Node(30);
Trees.Classes.Node n4 = new Trees.Classes.Node(40);
Trees.Classes.Node n5 = new Trees.Classes.Node(50);
Trees.Classes.Node n6 = new Trees.Classes.Node(60);
BinaryTree b1 = new BinaryTree(n1);
b1.Add(n1, n2);
b1.Add(n1, n3);
b1.Add(n1, n4);
b1.Add(n1, n5);
b1.Add(n1, n6);
Trees.Classes.Node n1v2 = new Trees.Classes.Node(20);
Trees.Classes.Node n2v2 = new Trees.Classes.Node(30);
Trees.Classes.Node n3v2 = new Trees.Classes.Node(10);
Trees.Classes.Node n4v2 = new Trees.Classes.Node(60);
Trees.Classes.Node n5v2 = new Trees.Classes.Node(40);
Trees.Classes.Node n6v2 = new Trees.Classes.Node(50);
BinaryTree b2 = new BinaryTree(n1v2);
b1.Add(n1v2, n2v2);
b1.Add(n1v2, n3v2);
b1.Add(n1v2, n4v2);
b1.Add(n1v2, n5v2);
b1.Add(n1v2, n6v2);
// Act
List <int> intersect = Program.TreeIntersection(n1, n1v2);
List <int> expectedList = new List <int> {
20, 30, 10, 60, 40, 50
};
// Assert
Assert.Equal(expectedList, intersect);
}
static void Main(string[] args)
{
Trees.Classes.Node n1 = new Trees.Classes.Node(10);
Trees.Classes.Node n2 = new Trees.Classes.Node(20);
Trees.Classes.Node n3 = new Trees.Classes.Node(30);
Trees.Classes.Node n4 = new Trees.Classes.Node(40);
Trees.Classes.Node n5 = new Trees.Classes.Node(50);
Trees.Classes.Node n6 = new Trees.Classes.Node(60);
BinaryTree b1 = new BinaryTree(n1);
b1.Add(n1, n2);
b1.Add(n1, n3);
b1.Add(n1, n4);
b1.Add(n1, n5);
b1.Add(n1, n6);
Trees.Classes.Node n1v2 = new Trees.Classes.Node(15);
Trees.Classes.Node n2v2 = new Trees.Classes.Node(20);
Trees.Classes.Node n3v2 = new Trees.Classes.Node(25);
Trees.Classes.Node n4v2 = new Trees.Classes.Node(30);
Trees.Classes.Node n5v2 = new Trees.Classes.Node(35);
Trees.Classes.Node n6v2 = new Trees.Classes.Node(40);
BinaryTree b2 = new BinaryTree(n1v2);
b1.Add(n1v2, n2v2);
b1.Add(n1v2, n3v2);
b1.Add(n1v2, n4v2);
b1.Add(n1v2, n5v2);
b1.Add(n1v2, n6v2);
List <int> intersect = TreeIntersection(n1, n1v2);
foreach (int value in intersect)
{
Console.WriteLine($"An intersection is: {value}");
}
}
public void NoTreeValuesAreTheSameTest()
{
// Arrange
Trees.Classes.Node n1 = new Trees.Classes.Node(10);
Trees.Classes.Node n2 = new Trees.Classes.Node(20);
Trees.Classes.Node n3 = new Trees.Classes.Node(30);
Trees.Classes.Node n4 = new Trees.Classes.Node(40);
Trees.Classes.Node n5 = new Trees.Classes.Node(50);
Trees.Classes.Node n6 = new Trees.Classes.Node(60);
BinaryTree b1 = new BinaryTree(n1);
b1.Add(n1, n2);
b1.Add(n1, n3);
b1.Add(n1, n4);
b1.Add(n1, n5);
b1.Add(n1, n6);
Trees.Classes.Node n1v2 = new Trees.Classes.Node(1);
Trees.Classes.Node n2v2 = new Trees.Classes.Node(2);
Trees.Classes.Node n3v2 = new Trees.Classes.Node(3);
Trees.Classes.Node n4v2 = new Trees.Classes.Node(4);
Trees.Classes.Node n5v2 = new Trees.Classes.Node(5);
Trees.Classes.Node n6v2 = new Trees.Classes.Node(6);
BinaryTree b2 = new BinaryTree(n1v2);
b1.Add(n1v2, n2v2);
b1.Add(n1v2, n3v2);
b1.Add(n1v2, n4v2);
b1.Add(n1v2, n5v2);
b1.Add(n1v2, n6v2);
// Act
List <int> intersect = Program.TreeIntersection(n1, n1v2);
// Assert
Assert.Empty(intersect);
}