Add test for HTG FillMaterial

Filters/HyperTree/Testing/Cxx/CMakeLists.txt

@@ -11,6 +11,7 @@
 
 set(test_sources
   TestHyperTreeGrid2DInterfaceShift.cxx
+  TestHyperTreeGrid2DGeometryFillMaterial.cxx,NO_VALID,NO_OUTPUT
   TestHyperTreeGrid3DAxisCutCoincidentPlane.cxx
   TestHyperTreeGrid3DIntercepts.cxx
   TestHyperTreeGrid3DInterface.cxx

Filters/HyperTree/Testing/Cxx/TestHyperTreeGrid2DGeometryFillMaterial.cxx

+// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include "vtkActor.h"
+#include "vtkCamera.h"
+#include "vtkCellData.h"
+#include "vtkDataArray.h"
+#include "vtkHyperTreeGridGeometry.h"
+#include "vtkLogger.h"
+#include "vtkNew.h"
+#include "vtkPolyData.h"
+#include "vtkTestUtilities.h"
+#include "vtkXMLHyperTreeGridReader.h"
+
+int TestHyperTreeGrid2DGeometryFillMaterial(int argc, char* argv[])
+{
+  // HTG reader
+  vtkNew<vtkXMLHyperTreeGridReader> reader;
+
+  // Test data
+  char* fileNameC =
+    vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/HTG/donut_XZ_shift_2d.htg");
+  reader->SetFileName(fileNameC);
+  delete[] fileNameC;
+
+  // Geometry filter
+  vtkNew<vtkHyperTreeGridGeometry> geometryFilter;
+  geometryFilter->SetInputConnection(reader->GetOutputPort());
+  geometryFilter->Update();
+
+  vtkPolyData* geometry = geometryFilter->GetPolyDataOutput();
+  if (!geometry)
+  {
+    vtkLog(ERROR, "Unable to retrieve htg geometry.");
+    return EXIT_FAILURE;
+  }
+
+  if (geometry->GetNumberOfPoints() != 456 || geometry->GetNumberOfCells() != 114)
+  {
+    vtkLog(ERROR, "Incorrect number of points or cells.");
+    return EXIT_FAILURE;
+  }
+
+  geometryFilter->FillMaterialOff();
+  geometryFilter->Update();
+
+  vtkPolyData* interfaceLines = geometryFilter->GetPolyDataOutput();
+  if (!interfaceLines)
+  {
+    vtkLog(ERROR, "Unable to retrieve htg geometry.");
+    return EXIT_FAILURE;
+  }
+
+  if (interfaceLines->GetNumberOfPoints() != 282 || interfaceLines->GetNumberOfCells() != 100)
+  {
+    vtkLog(ERROR, "Incorrect number of points or cells.");
+    return EXIT_FAILURE;
+  }
+
+  return EXIT_SUCCESS;
+}