public void CreateGraph()
{
// a cube
var graph = new DirectedGraph(4);
graph.AddEdge(0, 1);
graph.AddEdge(1, 2);
graph.AddEdge(2, 3);
graph.AddEdge(3, 0);
graph.AddEdge(0, 2);
graph.AddEdge(3, 3);
Assert.AreEqual(4, graph.Vertices());
Assert.AreEqual(6, graph.Edges());
Assert.IsTrue(graph.AdjecentVertices(0).Contains(1));
Assert.IsTrue(graph.AdjecentVertices(2).Contains(3));
Assert.IsTrue(graph.AdjecentVertices(3).Contains(3));
Assert.IsFalse(graph.AdjecentVertices(1).Contains(0));
Assert.IsFalse(graph.AdjecentVertices(2).Contains(0));
}
