public void TestGraph()
{
MyGraph ourGraph = new MyGraph();
Knude A = new Knude();
Knude B = new Knude();
Knude C = new Knude();
Knude D = new Knude();
// add the four vertices to the graph
ourGraph.Add_vertex(A);
ourGraph.Add_vertex(B);
ourGraph.Add_vertex(C);
ourGraph.Add_vertex(D);
// add the edges between the vertices
ourGraph.Add_edge(A, B);
ourGraph.Add_edge(B, C);
ourGraph.Add_edge(B, D);
// add the edge weights to the edges
ourGraph.Set_edge_value(A, B, 5);
ourGraph.Set_edge_value(B, C, 3);
ourGraph.Set_edge_value(B, D, 1);
// now do some checks
Assert.IsTrue(ourGraph.Neighbors(D).Contains(B));
Assert.AreEqual(ourGraph.Get_edge_value(A, B), ourGraph.Get_edge_value(B, A));
Assert.IsTrue(ourGraph.Adjacent(C, B));
Assert.IsTrue(ourGraph.Adjacent(A, B));
ourGraph.Remove_vertex(B);
Assert.IsFalse(ourGraph.Adjacent(A, B));
}