public void BiDirectional_AdjancencyListGraph_Smoke_Test()
{
var graph = new Advanced.Algorithms.DataStructures.Graph.AdjacencyList.DiGraph <char>();
graph.AddVertex('A');
graph.AddVertex('B');
graph.AddVertex('C');
graph.AddVertex('D');
graph.AddVertex('E');
graph.AddVertex('F');
graph.AddVertex('G');
graph.AddVertex('H');
graph.AddVertex('I');
graph.AddEdge('A', 'B');
graph.AddEdge('B', 'C');
graph.AddEdge('C', 'D');
graph.AddEdge('D', 'E');
graph.AddEdge('E', 'F');
graph.AddEdge('F', 'G');
graph.AddEdge('G', 'H');
graph.AddEdge('H', 'I');
var algorithm = new BiDirectional <char>();
Assert.IsTrue(algorithm.PathExists(graph, 'A', 'I'));
graph.RemoveEdge('D', 'E');
graph.AddEdge('E', 'D');
Assert.IsFalse(algorithm.PathExists(graph, 'A', 'I'));
}
public void KosarajuStronglyConnected_AdjacenctListGraph_Smoke_Test()
{
var graph = new Advanced.Algorithms.DataStructures.Graph.AdjacencyList.DiGraph <char>();
graph.AddVertex('A');
graph.AddVertex('B');
graph.AddVertex('C');
graph.AddVertex('D');
graph.AddVertex('E');
graph.AddVertex('F');
graph.AddVertex('G');
graph.AddVertex('H');
graph.AddEdge('A', 'B');
graph.AddEdge('B', 'C');
graph.AddEdge('C', 'A');
graph.AddEdge('C', 'D');
graph.AddEdge('D', 'E');
graph.AddEdge('E', 'F');
graph.AddEdge('F', 'G');
graph.AddEdge('G', 'E');
graph.AddEdge('F', 'H');
var algorithm = new KosarajuStronglyConnected <char>();
var result = algorithm.FindStronglyConnectedComponents(graph);
Assert.AreEqual(4, result.Count);
var expectedResult = new List <List <char> >()
{
new char[] { 'A', 'B', 'C' }.ToList(),
new char[] { 'D' }.ToList(),
new char[] { 'E', 'F', 'G' }.ToList(),
new char[] { 'H' }.ToList()
};
for (int i = 0; i < expectedResult.Count; i++)
{
var expectation = expectedResult[i];
var actual = result[i];
Assert.IsTrue(expectation.Count == actual.Count);
foreach (var vertex in expectation)
{
Assert.IsTrue(actual.Contains(vertex));
}
}
}
public void DFS_Topological_Sort_AdjancencyListGraph_Smoke_Test()
{
var graph = new Advanced.Algorithms.DataStructures.Graph.AdjacencyList.DiGraph <char>();
graph.AddVertex('A');
graph.AddVertex('B');
graph.AddVertex('C');
graph.AddVertex('D');
graph.AddVertex('E');
graph.AddVertex('F');
graph.AddVertex('G');
graph.AddVertex('H');
graph.AddEdge('A', 'B');
graph.AddEdge('B', 'C');
graph.AddEdge('C', 'D');
graph.AddEdge('E', 'D');
graph.AddEdge('E', 'F');
graph.AddEdge('F', 'G');
graph.AddEdge('F', 'H');
var algorithm = new DepthFirstTopSort <char>();
var result = algorithm.GetTopSort(graph);
Assert.AreEqual(result.Count, 8);
}
public void Graph_Cycle_Detection_AdjancencyListGraph_Tests()
{
var graph = new Advanced.Algorithms.DataStructures.Graph.AdjacencyList.DiGraph <char>();
graph.AddVertex('A');
graph.AddVertex('B');
graph.AddVertex('C');
graph.AddVertex('D');
graph.AddVertex('E');
graph.AddVertex('F');
graph.AddVertex('G');
graph.AddVertex('H');
graph.AddEdge('A', 'B');
graph.AddEdge('B', 'C');
graph.AddEdge('C', 'A');
graph.AddEdge('C', 'D');
graph.AddEdge('D', 'E');
graph.AddEdge('E', 'F');
graph.AddEdge('F', 'G');
graph.AddEdge('G', 'E');
graph.AddEdge('F', 'H');
var algorithm = new CycleDetector <char>();
Assert.IsTrue(algorithm.HasCycle(graph));
graph.RemoveEdge('C', 'A');
graph.RemoveEdge('G', 'E');
Assert.IsFalse(algorithm.HasCycle(graph));
}