alpar@906: /* -*- C++ -*-
alpar@921:  * src/test/kruskal_test.cc - Part of LEMON, a generic C++ optimization library
alpar@906:  *
alpar@906:  * Copyright (C) 2004 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
alpar@906:  * (Egervary Combinatorial Optimization Research Group, EGRES).
alpar@906:  *
alpar@906:  * Permission to use, modify and distribute this software is granted
alpar@906:  * provided that this copyright notice appears in all copies. For
alpar@906:  * precise terms see the accompanying LICENSE file.
alpar@906:  *
alpar@906:  * This software is provided "AS IS" with no warranty of any kind,
alpar@906:  * express or implied, and with no claim as to its suitability for any
alpar@906:  * purpose.
alpar@906:  *
alpar@906:  */
alpar@906: 
alpar@810: #include <iostream>
alpar@810: #include <vector>
alpar@810: 
alpar@810: #include "test_tools.h"
alpar@921: #include <lemon/maps.h>
alpar@921: #include <lemon/kruskal.h>
alpar@921: #include <lemon/list_graph.h>
alpar@921: #include <lemon/skeletons/maps.h>
alpar@921: #include <lemon/skeletons/graph.h>
alpar@810: 
alpar@810: 
alpar@810: using namespace std;
alpar@921: using namespace lemon;
alpar@810: 
alpar@810: void checkCompileKruskal()
alpar@810: {
alpar@880:   skeleton::WriteMap<skeleton::StaticGraph::Edge,bool> w;
alpar@810: 
alpar@880:   kruskalEdgeMap(skeleton::StaticGraph(),
alpar@880: 		 skeleton::ReadMap<skeleton::StaticGraph::Edge,int>(),
alpar@810: 		 w);
alpar@810: }
alpar@810: 
alpar@810: int main() {
alpar@810: 
alpar@810:   typedef ListGraph::Node Node;
alpar@810:   typedef ListGraph::Edge Edge;
alpar@810:   typedef ListGraph::NodeIt NodeIt;
alpar@810:   typedef ListGraph::EdgeIt EdgeIt;
alpar@810: 
alpar@810:   ListGraph G;
alpar@810: 
alpar@810:   Node s=G.addNode();
alpar@810:   Node v1=G.addNode();
alpar@810:   Node v2=G.addNode();
alpar@810:   Node v3=G.addNode();
alpar@810:   Node v4=G.addNode();
alpar@810:   Node t=G.addNode();
alpar@810:   
alpar@810:   Edge e1 = G.addEdge(s, v1);
alpar@810:   Edge e2 = G.addEdge(s, v2);
alpar@810:   Edge e3 = G.addEdge(v1, v2);
alpar@810:   Edge e4 = G.addEdge(v2, v1);
alpar@810:   Edge e5 = G.addEdge(v1, v3);
alpar@810:   Edge e6 = G.addEdge(v3, v2);
alpar@810:   Edge e7 = G.addEdge(v2, v4);
alpar@810:   Edge e8 = G.addEdge(v4, v3);
alpar@810:   Edge e9 = G.addEdge(v3, t);
alpar@810:   Edge e10 = G.addEdge(v4, t);
alpar@810: 
alpar@810:   typedef ListGraph::EdgeMap<int> ECostMap;
alpar@810:   typedef ListGraph::EdgeMap<bool> EBoolMap;
alpar@810: 
alpar@810:   ECostMap edge_cost_map(G, 2);
alpar@810:   EBoolMap tree_map(G);
alpar@810:   
alpar@810: 
alpar@810:   //Test with const map.
alpar@810:   check(kruskalEdgeMap(G, ConstMap<ListGraph::Edge,int>(2), tree_map)==10,
alpar@810: 	"Total cost should be 10");
alpar@810:   //Test with a edge map (filled with uniform costs).
alpar@810:   check(kruskalEdgeMap(G, edge_cost_map, tree_map)==10,
alpar@810: 	"Total cost should be 10");
alpar@810: 
alpar@810:   edge_cost_map.set(e1, -10);
alpar@810:   edge_cost_map.set(e2, -9);
alpar@810:   edge_cost_map.set(e3, -8);
alpar@810:   edge_cost_map.set(e4, -7);
alpar@810:   edge_cost_map.set(e5, -6);
alpar@810:   edge_cost_map.set(e6, -5);
alpar@810:   edge_cost_map.set(e7, -4);
alpar@810:   edge_cost_map.set(e8, -3);
alpar@810:   edge_cost_map.set(e9, -2);
alpar@810:   edge_cost_map.set(e10, -1);
alpar@810: 
alpar@810:   vector<Edge> tree_edge_vec;
alpar@810: 
alpar@810:   //Test with a edge map and inserter.
alpar@810:   check(kruskalEdgeMap_IteratorOut(G, edge_cost_map,
alpar@810: 				   back_inserter(tree_edge_vec))
alpar@810: 	==-31,
alpar@810: 	"Total cost should be -31.");
alpar@810: 
klao@885:   tree_edge_vec.clear();
klao@885: 
klao@885:   //The above test could also be coded like this:
klao@885:   check(kruskal(G,
klao@885: 		makeKruskalMapInput(G, edge_cost_map),
klao@885: 		makeKruskalSequenceOutput(back_inserter(tree_edge_vec)))
klao@885: 	==-31,
klao@885: 	"Total cost should be -31.");
klao@885: 
alpar@810:   check(tree_edge_vec.size()==5,"The tree should have 5 edges.");
alpar@810: 
alpar@810:   check(tree_edge_vec[0]==e1 &&
alpar@810: 	tree_edge_vec[1]==e2 &&
alpar@810: 	tree_edge_vec[2]==e5 &&
alpar@810: 	tree_edge_vec[3]==e7 &&
alpar@810: 	tree_edge_vec[4]==e9,
alpar@810: 	"Wrong tree.");
alpar@810: 
alpar@810:   return 0;
alpar@810: }