public void CanDFSAcyclicGraphWithBacktrackingAsAdjacencyList()
{
var scanner = new Scanner(CreateStream(
"7 6\n1 2\n1 3\n2 4\n2 5\n3 6\n3 7\n"
));
var g = Graph.AsAdjacencyList(scanner, directed: false);
var path = new List <Tuple <int, int> >();
var explored = new List <Tuple <int, int> >();
GraphTraversal.DFS(g, 0,
(node, parent) => path.Add(new Tuple <int, int>(node, parent)),
(node, parent) => explored.Add(new Tuple <int, int>(node, parent))
);
Assert.True(path.Count == 7);
Assert.True(
string.Join(",", path.Select(x => string.Format("({0},{1})", x.Item1, x.Item2))) ==
"(0,0),(1,0),(3,1),(4,1),(2,0),(5,2),(6,2)"
);
Assert.True(explored.Count == 7);
Assert.True(
string.Join(",", explored.Select(x => string.Format("({0},{1})", x.Item1, x.Item2))) ==
"(3,1),(4,1),(1,0),(5,2),(6,2),(2,0),(0,0)"
);
}
public void CanDFSAcyclicGraphAsVertexList()
{
var scanner = new Scanner(CreateStream(
"7 6\n1 2\n1 3\n2 4\n2 5\n3 6\n3 7\n"
));
var g = Graph.AsVertexList(scanner, directed: false);
var path = new List <int>();
GraphTraversal.DFS(g, g[0], (node) => path.Add(node.Index));
Assert.True(path.Count == 7);
Assert.True(
string.Join(",", path.Select(x => x.ToString())) ==
"0,2,6,5,1,4,3"
);
}
public void CanDFSCyclicGraphAsAdjacencyList()
{
var scanner = new Scanner(CreateStream(
"3 3\n1 2\n1 3\n2 3"
));
var g = Graph.AsAdjacencyList(scanner, directed: false);
var path = new List <int>();
GraphTraversal.DFS(g, 0, (node) => path.Add(node));
Assert.True(path.Count == 3);
Assert.True(
string.Join(",", path.Select(x => x.ToString())) ==
"0,2,1"
);
}