public void BasicTests()
{
var adjList = new DirectedAdjacencyList <int>(2);
adjList.AddVertex(10);
adjList.AddVertex(20);
adjList.CreateEdge(10, 20);
Assert.IsTrue(adjList.Adjacent(10, 20));
Assert.IsFalse(adjList.Adjacent(20, 10));
var undirectedList = new UndirectedAdjacenyList <int>(2);
undirectedList.AddVertex(10);
undirectedList.AddVertex(20);
undirectedList.CreateEdge(10, 20);
Assert.IsTrue(undirectedList.Adjacent(10, 20));
Assert.IsTrue(undirectedList.Adjacent(20, 10));
}