Correct test

IO/CGNS/Testing/Cxx/TestCGNSReaderHOElements.cxx

@@ -33,34 +33,20 @@ int TestCGNSReaderHOElements(int argc, char* argv[])
     return EXIT_FAILURE;
   }
 
-  if (dataset->GetNumberOfBlocks() != 2)
+  if (dataset->GetNumberOfBlocks() != 1)
   {
-    std::cerr << "Dataset should have 2 blocks but got " << dataset->GetNumberOfBlocks() << "."
+    std::cerr << "Dataset should have 1 blocks but got " << dataset->GetNumberOfBlocks() << "."
               << std::endl;
     return EXIT_FAILURE;
   }
 
   // Check main 3D mesh
-  vtkMultiBlockDataSet* zone1 = vtkMultiBlockDataSet::SafeDownCast(
+  vtkUnstructuredGrid* internal_hexa_125 = vtkUnstructuredGrid::SafeDownCast(
     vtkMultiBlockDataSet::SafeDownCast(dataset->GetBlock(0))->GetBlock(0));
 
-  vtkMultiBlockDataSet* zone2 = vtkMultiBlockDataSet::SafeDownCast(
+  vtkUnstructuredGrid* internal_hexa_64 = vtkUnstructuredGrid::SafeDownCast(
     vtkMultiBlockDataSet::SafeDownCast(dataset->GetBlock(0))->GetBlock(1));
 
-  if (!zone1)
-  {
-    std::cerr << "Could not find zone block under base block." << std::endl;
-    return EXIT_FAILURE;
-  }
-
-  if (!zone2)
-  {
-    std::cerr << "Could not find zone block under base block." << std::endl;
-    return EXIT_FAILURE;
-  }
-
-  vtkUnstructuredGrid* internal_hexa_125 = vtkUnstructuredGrid::SafeDownCast(zone1->GetBlock(0));
-
   // Count number of cells and check cell types
   if (internal_hexa_125->GetNumberOfCells() != 1)
   {
@@ -78,16 +64,6 @@ int TestCGNSReaderHOElements(int argc, char* argv[])
     return EXIT_FAILURE;
   }
 
-  vtkUnstructuredGrid* internal_hexa_64 = vtkUnstructuredGrid::SafeDownCast(zone2->GetBlock(0));
-
-  // Count number of cells and check cell types
-  if (internal_hexa_64->GetNumberOfCells() != 1)
-  {
-    std::cerr << "Wrong number of cells in main mesh. Expected 1 but got "
-              << internal_hexa_125->GetNumberOfCells() << "." << std::endl;
-    return EXIT_FAILURE;
-  }
-
   if (internal_hexa_64->GetCellType(0) != VTK_LAGRANGE_HEXAHEDRON)
   {
     std::cerr