Add test AxisAlignedReflectionFilter composite dataset with null input

Filters/General/Testing/CMakeLists.txt

@@ -13,6 +13,7 @@ vtk_module_test_data(
   Data/fullhead15.png
   Data/hexa.vtk
   Data/mb-of-mps.vtm
+  Data/mb_single_piece_empty_data.vtm
   Data/mine_with_dates.vtp
   Data/quadraticTetra01.vtu
   Data/rectGrid.vtr

Filters/General/Testing/Cxx/TestAxisAlignedReflectionFilter.cxx

@@ -395,6 +395,19 @@ int TestMultiBlockOnlyDataSets(int argc, char* argv[])
   return EXIT_SUCCESS;
 }
 
+int TestMultiBlockEmptyPiece(int argc, char* argv[])
+{
+  ReadFileMacro("Data/mb_single_piece_empty_data.vtm", vtkXMLMultiBlockDataReader);
+
+  vtkSmartPointer<vtkPartitionedDataSetCollection> output =
+    Reflect(reader->GetOutputPort(), true, true, vtkAxisAlignedReflectionFilter::X_MIN);
+
+  AssertMacro(output->GetNumberOfPartitionedDataSets() == 2, output->GetClassName(),
+    "Incorrect number of partitioned datasets")
+
+    return EXIT_SUCCESS;
+}
+
 // This function tests all the input types, and each input type will test a different plane mode.
 int TestAxisAlignedReflectionFilter(int argc, char* argv[])
 {
@@ -402,5 +415,5 @@ int TestAxisAlignedReflectionFilter(int argc, char* argv[])
     TestRectilinearGrid(argc, argv) || TestExplicitStructuredGrid(argc, argv) ||
     TestStructuredGrid(argc, argv) || TestPolyData(argc, argv) || TestHyperTreeGrid(argc, argv) ||
     TestPartitionedDataSetCollection(argc, argv) || TestMultiBlockMultiPiece(argc, argv) ||
-    TestMultiBlockOnlyDataSets(argc, argv);
+    TestMultiBlockOnlyDataSets(argc, argv) || TestMultiBlockEmptyPiece(argc, argv);
 }

Testing/Data/mb_single_piece_empty_data.vtm.sha512

+4aa443c77a1817d8a115465ec00759c3cc1664a3f1973d9ebc938511e827d34604f5f1412b1f12face3c7987c0dd1ffd47552b7a6a5cf8c5bd955421c9af8eb7