public void TestLiveEdgeDynamicGraphCompressVertices()
        {
            using (var graph = new MemoryMappedFileDynamicGraph <LiveEdge>(1000, 1024))
            {
                var vertex1 = graph.AddVertex(51, 1);
                var vertex2 = graph.AddVertex(51, 2);
                var vertex3 = graph.AddVertex(51, 3);
                var vertex4 = graph.AddVertex(51, 3);

                graph.AddEdge(vertex1, vertex2, new LiveEdge()
                {
                    Forward = true,
                    Tags    = 1
                }, null);
                graph.AddEdge(vertex2, vertex3, new LiveEdge()
                {
                    Forward = true,
                    Tags    = 2
                }, null);
                graph.AddEdge(vertex3, vertex4, new LiveEdge()
                {
                    Forward = true,
                    Tags    = 3
                }, null);

                graph.AddEdge(vertex4, vertex2, new LiveEdge()
                {
                    Forward = true,
                    Tags    = 4
                }, null);

                // make vertex4 obsolete.
                graph.RemoveEdges(vertex4);

                graph.Compress();

                Assert.AreEqual(3, graph.VertexCount);

                Assert.AreEqual(graph.GetEdges(vertex1).Length, 1);
                Assert.AreEqual(graph.GetEdges(vertex2).Length, 2);
                Assert.AreEqual(graph.GetEdges(vertex3).Length, 1);
            }
        }
        public void TestLiveEdgeDynamicGraphRemoveAllOneVertex()
        {
            using (var graph = new MemoryMappedFileDynamicGraph <LiveEdge>(1000, 1024))
            {
                var vertex1 = graph.AddVertex(51, 1);
                var vertex2 = graph.AddVertex(51, 2);
                var vertex3 = graph.AddVertex(51, 3);
                var vertex4 = graph.AddVertex(51, 3);

                graph.AddEdge(vertex1, vertex2, new LiveEdge()
                {
                    Forward = true,
                    Tags    = 1
                });
                graph.AddEdge(vertex2, vertex3, new LiveEdge()
                {
                    Forward = true,
                    Tags    = 2
                });
                graph.AddEdge(vertex3, vertex4, new LiveEdge()
                {
                    Forward = true,
                    Tags    = 3
                });

                graph.AddEdge(vertex4, vertex2, new LiveEdge()
                {
                    Forward = true,
                    Tags    = 4
                });

                graph.RemoveEdges(vertex2);
                Assert.IsFalse(graph.ContainsEdge(vertex2, vertex1));
                Assert.IsFalse(graph.ContainsEdge(vertex2, vertex3));
                Assert.IsFalse(graph.ContainsEdge(vertex4, vertex2));
                Assert.IsTrue(graph.ContainsEdge(vertex3, vertex4));
            }
        }