Changes in test/bfs_test.cc [209:765619b7cbb2:228:b6732e0d38c5] in lemon-main

File:

• test/bfs_test.cc (modified) (5 diffs)

test/bfs_test.cc

@@ -20 +20 @@
 #include <lemon/smart_graph.h>
 #include <lemon/list_graph.h>
+#include <lemon/lgf_reader.h>
 #include <lemon/bfs.h>
 #include <lemon/path.h>
@@ -27 +28 @@
 
 using namespace lemon;
+
+char test_lgf[] =
+  "@nodes\n"
+  "label\n"
+  "0\n"
+  "1\n"
+  "2\n"
+  "3\n"
+  "4\n"
+  "5\n"
+  "@arcs\n"
+  "     label\n"
+  "0 1  0\n"
+  "1 2  1\n"
+  "2 3  2\n"
+  "3 4  3\n"
+  "0 3  4\n"
+  "0 3  5\n"
+  "5 2  6\n"
+  "@attributes\n"
+  "source 0\n"
+  "target 4\n";
 
 void checkBfsCompile()
@@ -50 +73 @@
   n  = bfs_test.predNode(n);
   d  = bfs_test.distMap();
+
   p  = bfs_test.predMap();
   //  pn = bfs_test.predNodeMap();
@@ -81 +105 @@
   Digraph G;
   Node s, t;
-  PetStruct<Digraph> ps = addPetersen(G, 5);
 
-  s=ps.outer[2];
-  t=ps.inner[0];
+  std::istringstream input(test_lgf);
+  digraphReader(input, G).
+    node("source", s).
+    node("target", t).
+    run();
 
   Bfs<Digraph> bfs_test(G);
   bfs_test.run(s);
 
-  check(bfs_test.dist(t)==3,"Bfs found a wrong path." << bfs_test.dist(t));
+  check(bfs_test.dist(t)==2,"Bfs found a wrong path." << bfs_test.dist(t));
 
   Path<Digraph> p = bfs_test.path(t);
-  check(p.length()==3,"path() found a wrong path.");
+  check(p.length()==2,"path() found a wrong path.");
   check(checkPath(G, p),"path() found a wrong path.");
   check(pathSource(G, p) == s,"path() found a wrong path.");
@@ -98 +124 @@
 
 
-  for(ArcIt e(G); e==INVALID; ++e) {
-    Node u=G.source(e);
-    Node v=G.target(e);
+  for(ArcIt a(G); a!=INVALID; ++a) {
+    Node u=G.source(a);
+    Node v=G.target(a);
     check( !bfs_test.reached(u) ||
-           (bfs_test.dist(v) > bfs_test.dist(u)+1),
-           "Wrong output.");
+           (bfs_test.dist(v) <= bfs_test.dist(u)+1),
+           "Wrong output." << G.id(v) << ' ' << G.id(u));
   }
 
-  for(NodeIt v(G); v==INVALID; ++v) {
-    check(bfs_test.reached(v),"Each node should be reached.");
-    if ( bfs_test.predArc(v)!=INVALID ) {
-      Arc e=bfs_test.predArc(v);
-      Node u=G.source(e);
-      check(u==bfs_test.predNode(v),"Wrong tree.");
-      check(bfs_test.dist(v) - bfs_test.dist(u) == 1,
-            "Wrong distance. Difference: "
-            << std::abs(bfs_test.dist(v) - bfs_test.dist(u)
-                        - 1));
+  for(NodeIt v(G); v!=INVALID; ++v) {
+    if (bfs_test.reached(v)) {
+      check(v==s || bfs_test.predArc(v)!=INVALID, "Wrong tree.");
+      if (bfs_test.predArc(v)!=INVALID ) {
+        Arc a=bfs_test.predArc(v);
+        Node u=G.source(a);
+        check(u==bfs_test.predNode(v),"Wrong tree.");
+        check(bfs_test.dist(v) - bfs_test.dist(u) == 1,
+              "Wrong distance. Difference: "
+              << std::abs(bfs_test.dist(v) - bfs_test.dist(u)
+                          - 1));
+      }
     }
   }