public void BasicTest()
{
//Graph with three vertexes
Graph graph = new Graph(3);
graph.Add(0, 1, 2);
graph.Add(1, 2, 1);
graph.Add(0, 2, 5);
// Min cost path from vertex (0) to vertex (2)
int[] result = new int[]{0, 1, 2};
Assert.That(graph.ShortestPath(0, 2), Is.EqualTo(result));
}
public void ForestTest()
{
Graph graph = new Graph(6);
graph.Add(0, 1, 1);
graph.Add(0, 2, 1);
graph.Add(1, 2, 1);
graph.Add(3, 5, 1);
graph.Add(3, 4, 1);
graph.Add(4, 5, 1);
int[] result = new int[0];
Assert.That(graph.ShortestPath(0, 5), Is.EqualTo(result));
}
public void GraphWithBridgeTest()
{
Graph graph = new Graph(7);
graph.Add(0, 1, 4);
graph.Add(0, 2, 5);
graph.Add(1, 3, 3);
graph.Add(2, 3, 1);
graph.Add(3, 4, 2);
graph.Add(4, 5, 4);
graph.Add(4, 6, 3);
graph.Add(5, 6, 2);
int[] result = new int[]{0, 2, 3, 4, 5};
Assert.That(graph.ShortestPath(0, 5), Is.EqualTo(result));
}
public void CompleteGraphTest()
{
Graph graph = new Graph(5);
graph.Add(0, 1, 3);
graph.Add(0, 2, 7);
graph.Add(0, 3, 9);
graph.Add(0, 4, 1);
graph.Add(1, 2, 5);
graph.Add(1, 3, 5);
graph.Add(1, 4, 3);
graph.Add(2, 3, 2);
graph.Add(2, 4, 9);
graph.Add(3, 4, 8);
int[] result = new int[]{0, 1, 3};
Assert.That(graph.ShortestPath(0, 3), Is.EqualTo(result));
}
public void RegularGraphTest()
{
Graph graph = new Graph(6);
graph.Add(0, 1, 2);
graph.Add(0, 2, 4);
graph.Add(1, 2, 1);
graph.Add(2, 3, 5);
graph.Add(1, 3, 8);
graph.Add(1, 4, 10);
graph.Add(3, 4, 2);
graph.Add(3, 5, 6);
graph.Add(4, 5, 3);
int[] result = new int[]{0, 1, 2, 3, 4, 5};
Assert.That(graph.ShortestPath(0, 5), Is.EqualTo(result));
}
public void WeirdGraphTest()
{
Graph graph = new Graph(8);
graph.Add(0, 1, 2);
graph.Add(1, 3, 1);
graph.Add(1, 2, 4);
graph.Add(3, 2, 2);
graph.Add(2, 4, 2);
graph.Add(2, 5, 2);
graph.Add(5, 7, 3);
graph.Add(5, 6, 5);
graph.Add(6, 7, 1);
int[] result = new int[]{6, 7, 5, 2, 3, 1, 0};
Assert.That(graph.ShortestPath(6, 0), Is.EqualTo(result));
}
public void TreeGraphTest()
{
Graph graph = new Graph(8);
graph.Add(0, 1, 1);
graph.Add(0, 2, 1);
graph.Add(2, 3, 1);
graph.Add(2, 4, 1);
graph.Add(2, 5, 1);
graph.Add(4, 6, 1);
graph.Add(4, 7, 1);
int[] result = new int[]{1, 0, 2, 4, 6};
Assert.That(graph.ShortestPath(1, 6), Is.EqualTo(result));
}