Merge pull request InsightSoftwareConsortium#5938 from hjmjohnson/convert-itkScalarToRGBPixelFunctorTest-to-gtest

ENH: Convert itkScalarToRGBPixelFunctorTest to GTest

Author: hjmjohnson

Modules/Filtering/ImageFusion/itk-module.cmake

@@ -10,6 +10,7 @@ itk_module(
     ITKBinaryMathematicalMorphology
     ITKImageLabel
   TEST_DEPENDS
+    ITKGoogleTest
     ITKTestKernel
   DESCRIPTION "${DOCUMENTATION}"
 )

Modules/Filtering/ImageFusion/test/CMakeLists.txt

@@ -1,7 +1,6 @@
 itk_module_test()
 set(
   ITKImageFusionTests
-  itkScalarToRGBPixelFunctorTest.cxx
   itkLabelOverlayImageFilterTest.cxx
   itkLabelToRGBImageFilterTest.cxx
   itkLabelMapToRGBImageFilterTest1.cxx
@@ -16,12 +15,6 @@ set(
 
 createtestdriver(ITKImageFusion "${ITKImageFusion-Test_LIBRARIES}" "${ITKImageFusionTests}")
 
-itk_add_test(
-  NAME itkScalarToRGBPixelFunctorTest
-  COMMAND
-    ITKImageFusionTestDriver
-    itkScalarToRGBPixelFunctorTest
-)
 itk_add_test(
   NAME itkLabelOverlayImageFilterTest-Opacity-0_0
   COMMAND
@@ -326,3 +319,6 @@ itk_add_test(
     ${ITK_TEST_OUTPUT_DIR}/itkLabelMapOverlayImageFilterTest3.png
     0.3
 )
+
+set(ITKImageFusionGTests itkScalarToRGBPixelFunctorGTest.cxx)
+creategoogletestdriver(ITKImageFusion "${ITKImageFusion-Test_LIBRARIES}" "${ITKImageFusionGTests}")

Modules/Filtering/ImageFusion/test/itkScalarToRGBPixelFunctorGTest.cxx

@@ -0,0 +1,74 @@
+/*=========================================================================
+ *
+ *  Copyright NumFOCUS
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *         https://www.apache.org/licenses/LICENSE-2.0.txt
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *=========================================================================*/
+
+#include "itkScalarToRGBPixelFunctor.h"
+#include "itkGTest.h"
+
+TEST(ScalarToRGBPixelFunctor, ConvertedLegacyTest)
+{
+  itk::RGBPixel<unsigned char> pixel;
+
+  // Test with unsigned long.
+  itk::Functor::ScalarToRGBPixelFunctor<unsigned long> ulf;
+
+  ulf.SetBigEndian();
+  for (unsigned long ul = 0; ul < 100; ++ul)
+  {
+    pixel = ulf(ul);
+  }
+
+  ulf.SetLittleEndian();
+  for (unsigned long ul = 0; ul < 100; ++ul)
+  {
+    pixel = ulf(ul);
+  }
+
+  // Test with unsigned char.
+  const itk::Functor::ScalarToRGBPixelFunctor<unsigned char> ucf;
+
+  for (char c = 0; c < 100; ++c)
+  {
+    pixel = ucf(c);
+  }
+
+  // Test with float
+  itk::Functor::ScalarToRGBPixelFunctor<float> ff;
+  ff.SetBigEndian();
+  for (float f = 0; f < 100; ++f)
+  {
+    pixel = ff(f);
+  }
+
+  ff.SetLittleEndian();
+  for (float f = 0; f < 100; ++f)
+  {
+    pixel = ff(f);
+  }
+
+  ff.SetUseMSBForHashing(true);
+  EXPECT_TRUE(ff.GetUseMSBForHashing());
+
+  ff.SetUseMSBForHashing(false);
+  EXPECT_FALSE(ff.GetUseMSBForHashing());
+
+  ff.UseMSBForHashingOn();
+  EXPECT_TRUE(ff.GetUseMSBForHashing());
+
+  ff.UseMSBForHashingOff();
+  EXPECT_FALSE(ff.GetUseMSBForHashing());
+}