diff -r 9fff45a59e92 -r be6ee857b72d src/test/undir_graph_test.cc
--- a/src/test/undir_graph_test.cc	Thu Dec 09 10:45:32 2004 +0000
+++ b/src/test/undir_graph_test.cc	Thu Dec 09 15:30:12 2004 +0000
@@ -33,6 +33,12 @@
   checkConcept<UndirGraph, Graph>();
   checkConcept<ErasableUndirGraph, Graph>();
 
+  checkConcept<UndirGraph, UndirListGraph>();
+  checkConcept<ErasableUndirGraph, UndirListGraph>();
+
+  checkConcept<UndirGraph, UndirSmartGraph>();
+  checkConcept<ExtendableUndirGraph, UndirSmartGraph>();
+
   checkConcept<UndirGraph, UndirGraph>();
 
   return 0;