public void AdjacencyList_RemoveVertex_RemovesVerticesWithEdges()
{
int vertex1 = 10;
int vertex2 = 20;
int vertex3 = 30;
int vertex4 = 40;
string edge1 = "20-30";
string edge2 = "30-40";
AdjacencyList <int, string> adjacencyList = new AdjacencyList <int, string>();
adjacencyList.AddVertex(vertex1);
adjacencyList.AddVertex(vertex2);
adjacencyList.AddVertex(vertex3);
adjacencyList.AddVertex(vertex4);
adjacencyList.AddEdge(vertex2, vertex3, edge1);
adjacencyList.AddEdge(vertex3, vertex4, edge2);
Assert.Equal(4, adjacencyList.NumVertices);
Assert.Equal(edge1, adjacencyList.FindEdge(vertex2, vertex3));
Assert.Equal(edge2, adjacencyList.FindEdge(vertex3, vertex4));
adjacencyList.RemoveVertex(vertex2);
Assert.Equal(3, adjacencyList.NumVertices);
Assert.Equal(edge2, adjacencyList.FindEdge(vertex3, vertex4));
}
public void AdjacencyList_FindEdge_LooksForEdgesByVertices()
{
int vertex1 = 10;
int vertex2 = 20;
int vertex3 = 30;
int vertex4 = 40;
string edge1 = "20-30";
string edge2 = "30-40";
AdjacencyList <int, string> adjacencyList = new AdjacencyList <int, string>();
adjacencyList.AddVertex(vertex1);
adjacencyList.AddVertex(vertex2);
adjacencyList.AddVertex(vertex3);
adjacencyList.AddVertex(vertex4);
adjacencyList.AddEdge(vertex2, vertex3, edge1);
adjacencyList.AddEdge(vertex3, vertex4, edge2);
Assert.Equal(edge1, adjacencyList.FindEdge(vertex2, vertex3));
Assert.Equal(edge2, adjacencyList.FindEdge(vertex3, vertex4));
}