text: /*=========================================================================
   *
   *  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
   *
   *         http://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 <fstream>
  #include "itkImageFileReader.h"
  #include "itkImageFileWriter.h"
  #include "itkMetaDataObject.h"
  #include "itkMetaImageIO.h"
  #include "itkTestingHashImageFilter.h"
  #include "itkTestingMacros.h"
  
  // Specific ImageIO test
  
  namespace
  {
  
  int
  TestUnknowMetaDataBug(const std::string & fname)
  {
    std::cout << "Testing for unknown meta data entry bug." << std::endl;
  
    try
    {
      using PixelType = unsigned short;
      using ImageType = itk::Image<PixelType, 2>;
  
      ImageType::RegionType region;
      ImageType::SizeType   size = { { 32, 32 } };
      region.SetSize(size);
  
      auto image = ImageType::New();
      image->SetRegions(region);
      image->Allocate();
      image->FillBuffer(0);
  
      itk::MetaDataDictionary & dict = image->GetMetaDataDictionary();
  
      itk::EncapsulateMetaData<float>(dict, "ASimpleFloatInitalized", static_cast<float>(1.234560F));
      itk::EncapsulateMetaData<std::complex<float>>(
        dict, "AnUnsuportedComplexInitalized", std::complex<float>(1.234560F));
  
      using Hasher = itk::Testing::HashImageFilter<ImageType>;
      auto hasher = Hasher::New();
      hasher->SetInput(image);
      hasher->InPlaceOff();
      hasher->Update();
  
      std::string originalHash = hasher->GetHash();
      std::cout << "\tOriginal image hash: " << originalHash << std::endl;
  
  
      // Write image out
      itk::ImageFileWriter<ImageType>::Pointer writer;
      writer = itk::ImageFileWriter<ImageType>::New();
      writer->SetInput(image);
      writer->SetFileName(fname);
      writer->Update();
  
      itk::ImageFileReader<ImageType>::Pointer reader;
      reader = itk::ImageFileReader<ImageType>::New();
      reader->SetFileName(fname);
  
      hasher->SetInput(reader->GetOutput());
      hasher->Update();
  
      std::string readHash = hasher->GetHash();
      std::cout << "\tRead hash: " << readHash << std::endl;
  
      ITK_TEST_EXPECT_EQUAL(originalHash, readHash);
    }
    catch (std::exception & e)
    {
      std::cerr << "Exception: " << e.what() << std::endl;
      return EXIT_FAILURE;
    }
    return EXIT_SUCCESS;
  }
  
  } // namespace
  
  int
  itkMetaImageIOTest2(int argc, char * argv[])
  {
    if (argc < 2)
    {
      std::cerr << "Missing Parameters." << std::endl;
      std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv) << " outputFileName" << std::endl;
      return EXIT_FAILURE;
    }
  
    const bool pass = (TestUnknowMetaDataBug(argv[1]) == EXIT_SUCCESS);
    return (pass ? EXIT_SUCCESS : EXIT_FAILURE);
  }
  