public void Test1()
{
// Arrange
var graph = new Graph();
graph.AddVertex(0);
graph.AddVertex(1);
graph.AddVertex(2);
graph.AddVertex(3);
graph.AddVertex(4);
graph.AddVertex(5);
graph.AddDirectedEdge(0, 1);
graph.AddDirectedEdge(0, 2);
graph.AddDirectedEdge(1, 2);
// cycle: 4 - 5 - 6 - 4
graph.AddDirectedEdge(3, 0);
graph.AddDirectedEdge(3, 4);
graph.AddDirectedEdge(4, 5);
graph.AddDirectedEdge(5, 3);
// Act
var hasCycle = DetectCycleProblem.DetectCycle(graph);
// Assert
Assert.IsTrue(hasCycle);
}
public void Test3()
{
// Arrange
var graph = new Graph();
graph.AddVertex(0);
graph.AddVertex(1);
graph.AddDirectedEdge(1, 0);
// Act
var hasCycle = DetectCycleProblem.DetectCycle(graph);
// Assert
Assert.IsFalse(hasCycle);
}