ENH: Increase itk::ObjectByObjectLabelMapFilter class coverage

Increase `itk::ObjectByObjectLabelMapFilter` class coverage:
- Exercise the basic object methods using the
  `ITK_EXERCISE_BASIC_OBJECT_METHODS` macro.
- Test the Set/Get methods using the `ITK_TEST_SET_GET_VALUE` macro.
- Test the boolean ivars using the `ITK_TEST_SET_GET_BOOLEAN` macro.
- Add the corresponding test arguments to the appropriate
  `CMakeLists.txt`test driver command.
- Use the `ITK_TRY_EXPECT_NO_EXCEPTION` macro to avoid boilerplate code.
- Improve slightly the test style to make them more consistent (e.g.
  input argument checking or test finishing message).

Modules/Filtering/LabelMap/test/CMakeLists.txt

@@ -484,12 +484,12 @@ itk_add_test(NAME itkObjectByObjectLabelMapFilterTest0
       COMMAND ITKLabelMapTestDriver
     --compare DATA{Baseline/itkObjectByObjectLabelMapFilterTest0.png}
               ${ITK_TEST_OUTPUT_DIR}/itkObjectByObjectLabelMapFilterTest0.png
-    itkObjectByObjectLabelMapFilterTest DATA{${ITK_DATA_ROOT}/Input/SpotsLabeled.png} ${ITK_TEST_OUTPUT_DIR}/itkObjectByObjectLabelMapFilterTest0.png 0)
+    itkObjectByObjectLabelMapFilterTest DATA{${ITK_DATA_ROOT}/Input/SpotsLabeled.png} ${ITK_TEST_OUTPUT_DIR}/itkObjectByObjectLabelMapFilterTest0.png 0 0 1)
 itk_add_test(NAME itkObjectByObjectLabelMapFilterTest1
       COMMAND ITKLabelMapTestDriver
     --compare DATA{Baseline/itkObjectByObjectLabelMapFilterTest1.png}
               ${ITK_TEST_OUTPUT_DIR}/itkObjectByObjectLabelMapFilterTest1.png
-    itkObjectByObjectLabelMapFilterTest DATA{${ITK_DATA_ROOT}/Input/SpotsLabeled.png} ${ITK_TEST_OUTPUT_DIR}/itkObjectByObjectLabelMapFilterTest1.png 1)
+    itkObjectByObjectLabelMapFilterTest DATA{${ITK_DATA_ROOT}/Input/SpotsLabeled.png} ${ITK_TEST_OUTPUT_DIR}/itkObjectByObjectLabelMapFilterTest1.png 1 0 1)
 itk_add_test(NAME itkPadLabelMapFilterTest1
       COMMAND ITKLabelMapTestDriver
     --compare DATA{Baseline/cthead1-label-pad.mha}

Modules/Filtering/LabelMap/test/itkObjectByObjectLabelMapFilterTest.cxx

@@ -29,11 +29,12 @@ int
 itkObjectByObjectLabelMapFilterTest(int argc, char * argv[])
 {
 
-  if (argc != 4)
+  if (argc != 6)
   {
-    std::cerr << "usage: " << itkNameOfTestExecutableMacro(argv) << " input output keepLabel" << std::endl;
-    // std::cerr << "  : " << std::endl;
-    exit(1);
+    std::cerr << "Missing Parameters." << std::endl;
+    std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv)
+              << " input output keepLabel binaryInternalOutput constrainPaddingToImage" << std::endl;
+    return EXIT_FAILURE;
   }
 
   constexpr int dim = 2;
@@ -60,11 +61,30 @@ itkObjectByObjectLabelMapFilterTest(int argc, char * argv[])
 
   using ObOType = itk::ObjectByObjectLabelMapFilter<LabelMapType>;
   ObOType::Pointer obo = ObOType::New();
+
+  ITK_EXERCISE_BASIC_OBJECT_METHODS(obo, ObjectByObjectLabelMapFilter, LabelMapFilter);
+
+
   obo->SetInput(i2l->GetOutput());
   obo->SetFilter(dilate);
+
   obo->SetPadSize(rad);
-  obo->SetKeepLabels(std::stoi(argv[3]));
-  //  obo->SetBinaryInternalOutput( false );
+  ITK_TEST_SET_GET_VALUE(rad, obo->GetPadSize());
+
+  auto keepLabels = static_cast<bool>(std::stoi(argv[3]));
+  ITK_TEST_SET_GET_BOOLEAN(obo, KeepLabels, keepLabels);
+
+  bool binaryInternalOutput = static_cast<bool>(std::stoi(argv[4]));
+  ITK_TEST_SET_GET_BOOLEAN(obo, BinaryInternalOutput, binaryInternalOutput);
+
+  bool constrainPaddingToImage = static_cast<bool>(std::stoi(argv[5]));
+  ITK_TEST_SET_GET_BOOLEAN(obo, ConstrainPaddingToImage, constrainPaddingToImage);
+
+  ObOType::InternalOutputPixelType internalForegroundValue =
+    itk::NumericTraits<ObOType::InternalOutputPixelType>::max();
+  obo->SetInternalForegroundValue(internalForegroundValue);
+  ITK_TEST_SET_GET_VALUE(internalForegroundValue, obo->GetInternalForegroundValue());
+
   itk::SimpleFilterWatcher watcher(obo, "filter");
 
   using L2IType = itk::LabelMapToLabelImageFilter<LabelMapType, ImageType>;
@@ -75,7 +95,10 @@ itkObjectByObjectLabelMapFilterTest(int argc, char * argv[])
   WriterType::Pointer writer = WriterType::New();
   writer->SetInput(l2i->GetOutput());
   writer->SetFileName(argv[2]);
-  writer->Update();
 
-  return 0;
+  ITK_TRY_EXPECT_NO_EXCEPTION(writer->Update());
+
+
+  std::cout << "Test finished" << std::endl;
+  return EXIT_SUCCESS;
 }