STYLE: Remove itk::Index variables from region initialization in tests

Removed `constexpr itk::Index` variables initialized by zero's, that were only
there as the index argument of a region initialization.

Follow-up to pull request #5627
commit f9885d2
"STYLE: Remove `T::IndexType index{}` from region initialization in tests"

Author: N-Dekker

Modules/Core/Common/test/itkAdaptorComparisonTest.cxx

@@ -170,9 +170,8 @@ itkAdaptorComparisonTest(int, char *[])
   using VectorImageType = itk::Image<itk::Vector<float, 3>, 3>;
 
   // Set up some images
-  constexpr itk::Size<3>  size{ 100, 100, 100 };
-  constexpr itk::Index<3> index{ 0, 0, 0 };
-  itk::ImageRegion<3>     region = { index, size };
+  constexpr itk::Size<3> size{ 100, 100, 100 };
+  itk::ImageRegion<3>    region{ size };
 
   auto scalar_image = ScalarImageType::New();
   auto vector_image = VectorImageType::New();

Modules/Core/Common/test/itkConstNeighborhoodIteratorTest.cxx

@@ -35,9 +35,7 @@ GetTestImage(int d1, int d2, int d3, int d4)
   sizeND[2] = d3;
   sizeND[3] = d4;
 
-  constexpr itk::Index<4> origND{};
-
-  const itk::ImageRegion<4> RegionND{ origND, sizeND };
+  const itk::ImageRegion<4> RegionND{ sizeND };
 
   auto imageND = TestImageType::New();
   imageND->SetRegions(RegionND);

Modules/Core/Common/test/itkConstNeighborhoodIteratorWithOnlyIndexTest.cxx

@@ -29,9 +29,7 @@ itkConstNeighborhoodIteratorWithOnlyIndexTestGetTestImage(int d1, int d2, int d3
   sizeND[2] = d3;
   sizeND[3] = d4;
 
-  constexpr itk::Index<4> origND{};
-
-  const itk::ImageRegion<4> RegionND{ origND, sizeND };
+  const itk::ImageRegion<4> RegionND{ sizeND };
 
   auto imageND = TImage::New();
   imageND->SetRegions(RegionND);

Modules/Core/Common/test/itkMinimumMaximumImageCalculatorTest.cxx

@@ -98,8 +98,7 @@ itkMinimumMaximumImageCalculatorTest(int, char *[])
 
   // Set the region over which perform the computations
   constexpr itk::Size<3>                 regionSize{ { 4, 4, 4 } };
-  constexpr itk::Index<3>                idx{ { 0, 0, 0 } };
-  const MinMaxCalculatorType::RegionType computationRegion{ idx, regionSize };
+  const MinMaxCalculatorType::RegionType computationRegion{ regionSize };
 
   calculator->SetRegion(computationRegion);
 

Modules/Core/Common/test/itkSliceIteratorTest.cxx

@@ -147,10 +147,9 @@ itkSliceIteratorTest(int, char *[])
   try
   {
 
-    constexpr itk::Size<2>  hoodRadius{ 2, 2 };
-    constexpr itk::Size<2>  imgSize{ 20, 20 };
-    constexpr itk::Index<2> zeroIndex{};
-    itk::ImageRegion<2>     reg = { zeroIndex, imgSize };
+    constexpr itk::Size<2> hoodRadius{ 2, 2 };
+    constexpr itk::Size<2> imgSize{ 20, 20 };
+    itk::ImageRegion<2>    reg{ imgSize };
 
     const std::slice                                         hslice(10, 5, 1); // slice through the horizontal center
     const std::slice                                         vslice(2, 5, 5);  // slice through the vertical center

Modules/Filtering/ImageFilterBase/test/itkCastImageFilterTest.cxx

@@ -283,10 +283,8 @@ TestVectorImageCast1()
   // Create a 1x3 image of 2D vectors
   auto image = FloatVectorImageType::New();
 
-  constexpr itk::Size<2>  size{ { 1, 3 } };
-  constexpr itk::Index<2> start{ { 0, 0 } };
-
-  const itk::ImageRegion<2> region(start, size);
+  constexpr itk::Size<2>    size{ { 1, 3 } };
+  const itk::ImageRegion<2> region{ size };
   image->SetNumberOfComponentsPerPixel(2);
   image->SetRegions(region);
   image->Allocate();
@@ -350,10 +348,8 @@ TestVectorImageCast2()
   // Create a 1x3 image of 2D vectors
   auto image = FloatVectorImageType::New();
 
-  constexpr itk::Size<2>  size{ { 1, 3 } };
-  constexpr itk::Index<2> start{ { 0, 0 } };
-
-  const itk::ImageRegion<2> region(start, size);
+  constexpr itk::Size<2>    size{ { 1, 3 } };
+  const itk::ImageRegion<2> region{ size };
   image->SetNumberOfComponentsPerPixel(2);
   image->SetRegions(region);
   image->Allocate();

Modules/IO/SpatialObjects/test/itkReadWriteSpatialObjectTest.cxx

@@ -279,10 +279,7 @@ itkReadWriteSpatialObjectTest(int argc, char * argv[])
     spacing[i] = i + 1;
   }
 
-  RegionType region;
-  region.SetSize(size);
-  constexpr itk::Index<3> zeroIndex{};
-  region.SetIndex(zeroIndex);
+  RegionType region{ size };
   itkImage->SetRegions(region);
   itkImage->SetSpacing(spacing);
   itkImage->Allocate();