ENH: Increase coverage for ImageStatistics module classes

Increase coverage for `ImageStatistics` module classes:
- Exercise the basic object methods using the
  `ITK_EXERCISE_BASIC_OBJECT_METHODS` macro.

Author: jhlegarreta

Modules/Filtering/ImageStatistics/test/itkLabelOverlapMeasuresImageFilterTest.cxx

@@ -37,6 +37,10 @@ LabelOverlapMeasures(int, char * argv[])
 
   using FilterType = itk::LabelOverlapMeasuresImageFilter<ImageType>;
   auto filter = FilterType::New();
+
+  ITK_EXERCISE_BASIC_OBJECT_METHODS(filter, LabelOverlapMeasuresImageFilter, ImageToImageFilter);
+
+
   filter->SetSourceImage(reader1->GetOutput());
   filter->SetTargetImage(reader2->GetOutput());
   filter->Update();

Modules/Filtering/ImageStatistics/test/itkLabelStatisticsImageFilterTest.cxx

@@ -59,6 +59,9 @@ itkLabelStatisticsImageFilterTest(int argc, char * argv[])
 
   auto filter = FilterType::New();
 
+  ITK_EXERCISE_BASIC_OBJECT_METHODS(filter, LabelStatisticsImageFilter, ImageToImageFilter);
+
+
   itk::SimpleFilterWatcher filterWatch(filter);
 
   filter->SetInput(reader1->GetOutput());

Modules/Filtering/ImageStatistics/test/itkMinimumMaximumImageFilterTest.cxx

@@ -20,6 +20,7 @@
 #include "itkSimpleFilterWatcher.h"
 #include "itkMacro.h"
 #include "itkMath.h"
+#include "itkTestingMacros.h"
 
 int
 itkMinimumMaximumImageFilterTest(int, char *[])
@@ -77,7 +78,11 @@ itkMinimumMaximumImageFilterTest(int, char *[])
   image->SetPixel(index, maximum);
 
   // Create and initialize the filter
-  auto                     filter = MinMaxFilterType::New();
+  auto filter = MinMaxFilterType::New();
+
+  ITK_EXERCISE_BASIC_OBJECT_METHODS(filter, MinimumMaximumImageFilter, ImageToImageFilter);
+
+
   itk::SimpleFilterWatcher watcher(filter);
 
   filter->SetInput(image);

Modules/Filtering/ImageStatistics/test/itkStatisticsImageFilterTest.cxx

@@ -68,6 +68,9 @@ itkStatisticsImageFilterTest(int argc, char * argv[])
   using FilterType = itk::StatisticsImageFilter<FloatImage>;
   auto filter = FilterType::New();
 
+  ITK_EXERCISE_BASIC_OBJECT_METHODS(filter, StatisticsImageFilter, ImageToImageFilter);
+
+
   itk::SimpleFilterWatcher filterWatch(filter);
 
   filter->SetInput(image);