using dynamic request_attribute method for the example

closes #2422

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@1242 fdac6126-5c0c-442c-9429-916003d36597

src/Unittests/unittests_tutorials.cc

@@ -609,9 +609,14 @@ TEST_F(OpenMeshTutorials, extending_the_mesh_using_traits) {
   EXPECT_TRUE(ok) << "Cannot write mesh to file 'smoothed_extended_output.off'";
 }
 
-/*
+
 TEST_F(OpenMeshTutorials, deleting_geometry_elements) {
-  MyMeshWithStatus mesh;
+  Mesh mesh;
+
+  // the request has to be called before a vertex/face/edge can be deleted. it grants access to the status attribute
+  mesh.request_face_status();
+  mesh.request_edge_status();
+  mesh.request_vertex_status();
 
   // generate vertices
   MyMeshWithStatus::VertexHandle vhandle[8];
@@ -730,7 +735,7 @@ TEST_F(OpenMeshTutorials, deleting_geometry_elements) {
 
   EXPECT_TRUE(ok) << "Cannot write mesh to file 'deleted_output.off'";
 }
-*/
+
 
 TEST_F(OpenMeshTutorials, storing_custom_properties) {
   MyMesh mesh;