At least call each multiplication method and each norm once. The least one...

At least call each multiplication method and each norm once.  The least one can do.  Please merge to release branch

[[Imported from SVN: r5911]]

dune/common/test/fmatrixtest.cc

@@ -211,7 +211,25 @@ void test_matrix()
     }
   }
 
-  A.infinity_norm();
+  // test the various matrix-vector products
+  A.mv(v,f);
+  A.mtv(v,f);
+  A.umv(v,f);
+  A.umtv(v,f);
+  A.umhv(v,f);
+  A.mmv(v,f);
+  A.mmtv(v,f);
+  A.mmhv(v,f);
+  A.usmv(0.5,v,f);
+  A.usmtv(0.5,v,f);
+  A.usmhv(0.5,v,f);
+
+
+  // Test the different matrix norms
+  assert( A.frobenius_norm() >= 0 );
+  assert( A.frobenius_norm2() >= 0 );
+  assert( A.infinity_norm() >= 0 );
+  assert( A.infinity_norm_real() >= 0);
 
   std::sort(v.begin(), v.end());