1 files changed, 197 insertions, 0 deletions
diff --git a/src/boost/libs/graph/test/bfs.cpp b/src/boost/libs/graph/test/bfs.cpp
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+++ b/src/boost/libs/graph/test/bfs.cpp
@@ -0,0 +1,197 @@
+//=======================================================================
+// Copyright 2001 University of Notre Dame.
+// Author: Andrew Janiszewski, Jeremy G. Siek
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//=======================================================================
+
+#include <boost/test/minimal.hpp>
+#include <boost/graph/adjacency_list.hpp>
+#include <boost/graph/random.hpp>
+#include <boost/graph/graph_utility.hpp>
+#include <boost/graph/graph_archetypes.hpp>
+#include <boost/graph/breadth_first_search.hpp>
+
+#include <boost/random/mersenne_twister.hpp>
+
+#ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
+using namespace boost;
+#endif
+
+template <typename DistanceMap, typename ParentMap,
+          typename Graph, typename ColorMap>
+class bfs_testing_visitor
+{
+  typedef typename boost::graph_traits<Graph>::vertex_descriptor Vertex;
+  typedef typename boost::graph_traits<Graph>::edge_descriptor Edge;
+  typedef typename boost::color_traits<
+    typename boost::property_traits<ColorMap>::value_type
+  > Color;
+public:
+
+  bfs_testing_visitor(Vertex s, DistanceMap d, ParentMap p, ColorMap c)
+    : current_distance(0), distance(d), parent(p), color(c), src(s) { }
+
+  void initialize_vertex(const Vertex& u, const Graph& ) const {
+    BOOST_CHECK(get(color, u) == Color::white());
+  }
+  void examine_vertex(const Vertex& u, const Graph& ) const {
+    current_vertex = u;
+    // Ensure that the distances monotonically increase.
+    BOOST_CHECK( distance[u] == current_distance
+                       || distance[u] == current_distance + 1 );
+    if (distance[u] == current_distance + 1) // new level
+      ++current_distance;
+  }
+  void discover_vertex(const Vertex& u, const Graph& ) const {
+    BOOST_CHECK( get(color, u) == Color::gray() );
+    if (u == src) {
+      current_vertex = src;
+    } else {
+      BOOST_CHECK( parent[u] == current_vertex );
+      BOOST_CHECK( distance[u] == current_distance + 1 );
+      BOOST_CHECK( distance[u] == distance[parent[u]] + 1 );
+    }
+  }
+  void examine_edge(const Edge& e, const Graph& g) const {
+    BOOST_CHECK( source(e, g) == current_vertex );
+  }
+  void tree_edge(const Edge& e, const Graph& g) const {
+    BOOST_CHECK( get(color, target(e, g)) == Color::white() );
+    Vertex u = source(e, g), v = target(e, g);
+    BOOST_CHECK( distance[u] == current_distance );
+    parent[v] = u;
+    distance[v] = distance[u] + 1;
+  }
+  void non_tree_edge(const Edge& e, const Graph& g) const {
+    BOOST_CHECK( color[target(e, g)] != Color::white() );
+
+    if (boost::is_directed(g))
+      // cross or back edge
+      BOOST_CHECK(distance[target(e, g)] <= distance[source(e, g)] + 1);
+    else {
+      // cross edge (or going backwards on a tree edge)
+      BOOST_CHECK(distance[target(e, g)] == distance[source(e, g)]
+                        || distance[target(e, g)] == distance[source(e, g)] + 1
+                        || distance[target(e, g)] == distance[source(e, g)] - 1
+                        );
+    }
+  }
+
+  void gray_target(const Edge& e, const Graph& g) const {
+    BOOST_CHECK( color[target(e, g)] == Color::gray() );
+  }
+
+  void black_target(const Edge& e, const Graph& g) const {
+    BOOST_CHECK( color[target(e, g)] == Color::black() );
+
+    // All vertices adjacent to a black vertex must already be discovered
+    typename boost::graph_traits<Graph>::adjacency_iterator ai, ai_end;
+    for (boost::tie(ai, ai_end) = adjacent_vertices(target(e, g), g);
+         ai != ai_end; ++ai)
+      BOOST_CHECK( color[*ai] != Color::white() );
+  }
+  void finish_vertex(const Vertex& u, const Graph& ) const {
+    BOOST_CHECK( color[u] == Color::black() );
+
+  }
+private:
+  mutable Vertex current_vertex;
+  mutable typename boost::property_traits<DistanceMap>::value_type
+    current_distance;
+  DistanceMap distance;
+  ParentMap parent;
+  ColorMap color;
+  Vertex src;
+};
+
+
+template <class Graph>
+struct bfs_test
+{
+  typedef boost::graph_traits<Graph> Traits;
+  typedef typename Traits::vertices_size_type
+    vertices_size_type;
+  static void go(vertices_size_type max_V) {
+    typedef typename Traits::vertex_descriptor vertex_descriptor;
+    typedef boost::color_traits<boost::default_color_type> Color;
+
+    vertices_size_type i;
+    typename Traits::edges_size_type j;
+    typename Traits::vertex_iterator ui, ui_end;
+
+    boost::mt19937 gen;
+
+    for (i = 0; i < max_V; ++i)
+      for (j = 0; j < i*i; ++j) {
+        Graph g;
+        boost::generate_random_graph(g, i, j, gen);
+
+        // declare the "start" variable
+        vertex_descriptor start = boost::random_vertex(g, gen);
+
+        // vertex properties
+        std::vector<int> distance(i, (std::numeric_limits<int>::max)());
+        distance[start] = 0;
+        std::vector<vertex_descriptor> parent(i);
+        for (boost::tie(ui, ui_end) = vertices(g); ui != ui_end; ++ui)
+          parent[*ui] = *ui;
+        std::vector<boost::default_color_type> color(i);
+
+        // Get vertex index map
+        typedef typename boost::property_map<Graph, boost::vertex_index_t>::const_type idx_type;
+        idx_type idx = get(boost::vertex_index, g);
+
+        // Make property maps from vectors
+        typedef
+          boost::iterator_property_map<std::vector<int>::iterator, idx_type>
+          distance_pm_type;
+        distance_pm_type distance_pm(distance.begin(), idx);
+        typedef
+          boost::iterator_property_map<typename std::vector<vertex_descriptor>::iterator, idx_type>
+          parent_pm_type;
+        parent_pm_type parent_pm(parent.begin(), idx);
+        typedef
+          boost::iterator_property_map<std::vector<boost::default_color_type>::iterator, idx_type>
+          color_pm_type;
+        color_pm_type color_pm(color.begin(), idx);
+
+        // Create the testing visitor.
+        bfs_testing_visitor<distance_pm_type, parent_pm_type, Graph,
+          color_pm_type>
+          vis(start, distance_pm, parent_pm, color_pm);
+
+        boost::breadth_first_search(g, start,
+                                    visitor(vis).
+                                    color_map(color_pm));
+
+        // All white vertices should be unreachable from the source.
+        for (boost::tie(ui, ui_end) = vertices(g); ui != ui_end; ++ui)
+          if (color[*ui] == Color::white()) {
+            std::vector<boost::default_color_type> color2(i, Color::white());
+            BOOST_CHECK(!boost::is_reachable(start, *ui, g, color_pm_type(color2.begin(), idx)));
+          }
+
+        // The shortest path to a child should be one longer than
+        // shortest path to the parent.
+        for (boost::tie(ui, ui_end) = vertices(g); ui != ui_end; ++ui)
+          if (parent[*ui] != *ui) // *ui not the root of the bfs tree
+            BOOST_CHECK(distance[*ui] == distance[parent[*ui]] + 1);
+      }
+  }
+};
+
+
+int test_main(int argc, char* argv[])
+{
+  using namespace boost;
+  int max_V = 7;
+  if (argc > 1)
+    max_V = atoi(argv[1]);
+
+  bfs_test< adjacency_list<vecS, vecS, directedS> >::go(max_V);
+  bfs_test< adjacency_list<vecS, vecS, undirectedS> >::go(max_V);
+  return 0;
+}