public void GraphWithVertexEdgePropertiesTest()
{
var graph = new AdjacencyListGraph <int, int>();
var v0 = new Vertex(0, 0);
var v1 = graph.AddVertex(new Vertex(1, 1));
graph.AddVertex(v0);
Assert.AreEqual(default(int), graph.GetVertexProp(v0));
graph.SetVertexProp(v0, 1);
Assert.AreEqual(1, graph.GetVertexProp(v0));
Assert.AreEqual(default(int), graph.GetVertexProp(v1));
graph.SetVertexProp(v1, -5);
Assert.AreEqual(-5, graph.GetVertexProp(v1));
graph.Clear();
Assert.Throws <GeomException>(() => graph.GetVertexProp(v1));
graph.AddVertex(v0);
graph.AddVertex(v1);
var e = new Edge(v0, v1);
graph.AddEdge(e);
Assert.AreEqual(default(int), graph.GetEdgeProp(e));
graph.SetEdgeProp(e, int.MaxValue);
Assert.AreEqual(int.MaxValue, graph.GetEdgeProp(e));
graph.Clear();
Assert.Throws <GeomException>(() => graph.GetEdgeProp(e));
}