static void Main(string[] args)
{
Console.WriteLine("Hello Graphs");
Console.WriteLine("");
List <object> listTest = new List <object>();
listTest.Add("soloNode");
Graph.Classes.Graph graph = new Graph.Classes.Graph(listTest);
graph.AddEdge("Apple", "Banana", 10);
graph.AddEdge("Dog", "Cat", 22);
graph.AddEdge("xBox", "PlayStation", 7);
Console.WriteLine("Creating a new graph with 7 nodes and 3 edges");
Console.WriteLine($"Return size of graph: {graph.Size()}");
Dictionary <object, int> toNeighbor = graph.GetNeighbors("Dog");
Dictionary <object, int> fromNeighbor = graph.GetNeighbors("xBox");
//Console.WriteLine($"Return neighbor of graph from Dog node:");
foreach (var item in toNeighbor.Values)
{
//Console.WriteLine(item);
}
Console.WriteLine("Return all vertices in the graph: ");
foreach (var item in graph.Vertices)
{
Console.WriteLine(item.Value);
}
Console.ReadLine();
}
public void GetNeighbots(object to, object from, int weight)
{
List <object> listTest = new List <object>();
Graph.Classes.Graph graph = new Graph.Classes.Graph(listTest);
graph.AddEdge(to, from, weight);
Dictionary <object, int> toNeighbor = graph.GetNeighbors(to);
Dictionary <object, int> fromNeighbor = graph.GetNeighbors(from);
Assert.True(toNeighbor.ContainsValue(weight) && fromNeighbor.ContainsValue(weight));
}
public void GetNeigborsCollectionTest(string expected, int index)
{
Graph.Classes.Graph graph = new Graph.Classes.Graph();
Node parent = new Node();
parent.Value = "A";
LinkedList <Tuple <Node, int> > originList = new LinkedList <Tuple <Node, int> >();
Tuple <Node, int> origin = new Tuple <Node, int>(parent, 0);
originList.AddFirst(origin);
graph.AdjacencyList.AddFirst(originList);
Node child = new Node();
child.Value = "B";
graph.AddEdge(parent, new Tuple <Node, int>(child, 5));
Node c = new Node();
c.Value = "C";
graph.AddEdge(parent, new Tuple <Node, int>(c, 4));
var nodeList = graph.GetNeighbors(parent);
Assert.Equal(expected, nodeList[index].Item1.Value);
}
public void NeighborsCountTest()
{
Graph.Classes.Graph graph = new Graph.Classes.Graph();
Node parent = new Node();
parent.Value = "A";
LinkedList <Tuple <Node, int> > originList = new LinkedList <Tuple <Node, int> >();
Tuple <Node, int> origin = new Tuple <Node, int>(parent, 0);
originList.AddFirst(origin);
graph.AdjacencyList.AddFirst(originList);
Node child = new Node();
child.Value = "B";
graph.AddEdge(parent, new Tuple <Node, int>(child, 5));
Node c = new Node();
c.Value = "C";
graph.AddEdge(parent, new Tuple <Node, int>(c, 4));
var nodeList = graph.GetNeighbors(parent);
Assert.Equal(2, nodeList.Count);
}
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Graph.Classes.Graph graph = new Graph.Classes.Graph();
Node parent = new Node();
parent.Value = "A";
LinkedList <Tuple <Node, int> > originList = new LinkedList <Tuple <Node, int> >();
Tuple <Node, int> origin = new Tuple <Node, int>(parent, 0);
originList.AddFirst(origin);
graph.AdjacencyList.AddFirst(originList);
Node child = new Node();
child.Value = "B";
graph.AddEdge(parent, new Tuple <Node, int>(child, 5));
Node c = new Node();
c.Value = "C";
graph.AddEdge(parent, new Tuple <Node, int>(c, 4));
foreach (var item in graph.AdjacencyList)
{
foreach (var node in item)
{
Console.Write(node.Item2);
Console.WriteLine(node.Item1.Value);
}
}
var nodeList = graph.GetNodes();
foreach (var item in nodeList)
{
Console.Write(item.Value);
}
var neighbor = graph.GetNeighbors(parent);
foreach (var item in neighbor)
{
Console.Write(item.Item1.Value);
Console.WriteLine(item.Item2);
}
var count = graph.Size();
Console.WriteLine(count);
Console.ReadKey();
}
public void NeighborsNullTest()
{
Graph.Classes.Graph graph = new Graph.Classes.Graph();
Node parent = new Node();
parent.Value = "A";
var nodeList = graph.GetNeighbors(parent);
Assert.Empty(nodeList);
}
/// <summary>
/// checks if direct flight is possible
/// </summary>
/// <param name="graph">graph of cities</param>
/// <param name="cities">city iternary</param>
/// <returns>tuple contain bool and string in money format</returns>
public static Tuple <bool, string> GetEdge(Graph.Classes.Graph graph, Node[] cities)
{
if (cities.Length <= 1 || graph.AdjacencyList.Count == 0)
{
return(new Tuple <bool, string>(false, 0.ToString("C2")));
}
int money = 0;
bool exists = true;
Tuple <bool, string> costs = new Tuple <bool, string> (exists, money.ToString("C2"));
for (int i = 0; i < cities.Length - 1; i++)
{
List <Tuple <Node, int> > neighborNodes = graph.GetNeighbors(cities[i]);
foreach (var item in neighborNodes)
{
exists = false;
if (item.Item1 == cities[i + 1])
{
money += item.Item2;
exists = true;
}
if (exists)
{
break;
}
}
if (!exists)
{
break;
}
}
if (!exists)
{
return(new Tuple <bool, string>(exists, 0.ToString("C2")));
}
else
{
return(new Tuple <bool, string>(exists, money.ToString("C2")));
}
}
/// <summary>
/// Recursive private method for traversing a graph starting from a given vertex, and looks for the parameter route.
/// </summary>
/// <param name="graph">
/// Graph<string, int>: the graph we are traversing
/// </param>
/// <param name="traversal">
/// List<Vertex<string>>: a List of the vertices seen so far in a given traversal. Allows checking for whether we are in an infinite loop in the graph.
/// </param>
/// <param name="currVertex">
/// Vertex<string>: the current vertex we are looking at in the traversal
/// </param>
/// <param name="route">
/// string[]: the route we are looking for as an array of destinations
/// </param>
/// <param name="index">
/// int: the index of the next destination we are looking for in the route string[]
/// </param>
/// <param name="cost">
/// int: once a possible route is found, keeps track of the total cost of the route
/// </param>
/// <returns>
/// Tuple<bool, int>: a tuple containing whether the route is possible (bool), and if it is, its cost (int). If the route is not possible, returns -1 for the cost.
/// </returns>
private static Tuple <bool, int> GetEdges(this Graph <string, int> graph, List <Vertex <string> > traversal, Vertex <string> currVertex, string[] route, int index, int cost)
{
if (!traversal.Contains(currVertex))
{
traversal.Add(currVertex);
if (currVertex.Value.ToLower() == route[index].ToLower())
{
index++;
if (index >= route.Length)
{
return(Tuple.Create(true, cost));
}
}
var vertexEdges = graph.GetNeighbors(currVertex);
foreach (var oneEdge in vertexEdges)
{
cost += oneEdge.Weight;
return(GetEdges(graph, traversal, oneEdge.Vertex, route, index, cost));
}
}
return(Tuple.Create(false, -1));
}