text: /*=========================================================================
   *
   *  Copyright Insight Software Consortium
   *
   *  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.
   *
   *=========================================================================*/
  #if defined(_MSC_VER)
  #pragma warning ( disable : 4786 )
  #endif
  
  #include "itkLevelSetNeighborhoodExtractor.h"
  #include "itkFastMarchingImageFilter.h"
  
  int itkLevelSetNeighborhoodExtractorTest(int, char* [] )
  {
    const unsigned int ImageDimension = 2;
    typedef float PixelType;
    typedef itk::Image<PixelType,ImageDimension> ImageType;
  
    // Create an input image using fastmarching
    typedef itk::FastMarchingImageFilter<ImageType> SourceType;
    SourceType::Pointer source = SourceType::New();
  
    ImageType::SizeType size;
    size.Fill( 17 );
  
    source->SetOutputSize( size );
  
    SourceType::NodeType node;
    ImageType::IndexType index;
    index.Fill( 8 );
  
    node.SetIndex( index );
    node.SetValue( -4.0 );
  
    typedef SourceType::NodeContainer NodeContainerType;
    NodeContainerType::Pointer container = NodeContainerType::New();
  
    container->InsertElement( 0, node );
  
    source->SetTrialPoints( container );
    source->CollectPointsOn();
    source->Update();
  
    typedef itk::LevelSetNeighborhoodExtractor<ImageType> ExtractorType;
    ExtractorType::Pointer extractor = ExtractorType::New();
  
    extractor->SetInputLevelSet( source->GetOutput() );
    extractor->SetLevelSetValue( 0.0 );
    extractor->NarrowBandingOff();
  
    extractor->Locate();
  
    typedef NodeContainerType::ConstIterator Iterator;
    Iterator iter;
    Iterator iterEnd;
  
    std::cout << "Inside Points" << std::endl;
    iter    = extractor->GetInsidePoints()->Begin();
    iterEnd = extractor->GetInsidePoints()->End();
    for( ; iter != iterEnd; iter++ )
      {
      std::cout << iter.Value().GetIndex() << " ";
      std::cout << iter.Value().GetValue() << std::endl;
      }
  
    std::cout << "Outside Points" << std::endl;
    iter    = extractor->GetOutsidePoints()->Begin();
    iterEnd = extractor->GetOutsidePoints()->End();
    for( ; iter != iterEnd; iter++ )
      {
      std::cout << iter.Value().GetIndex() << " ";
      std::cout << iter.Value().GetValue() << std::endl;
      }
  
    // exercise Print
    extractor->Print( std::cout );
  
    // exercise Get methods
    std::cout << "InputLevelSet: " << extractor->GetInputLevelSet() << std::endl;
    std::cout << "LevelSetValue: " << extractor->GetLevelSetValue() << std::endl;
    std::cout << "NarrowBandwidth: " << extractor->GetNarrowBandwidth() << std::endl;
    std::cout << "NarrowBanding: " << extractor->GetNarrowBanding() << std::endl;
    std::cout << "InputNarrowBand: " << extractor->GetInputNarrowBand() << std::endl;
  
    // exercise error handling
    bool passed;
    std::cout << "Testing NULL inputs" << std::endl;
  
    try
      {
      passed = false;
      extractor->SetInputLevelSet( NULL );
      extractor->Locate();
      }
    catch( itk::ExceptionObject& err )
      {
      std::cout << err << std::endl;
      passed = true;
      extractor->SetInputLevelSet( source->GetOutput() );
      }
  
    if ( !passed )
      {
      std::cout << "Test failed" << std::endl;
      return EXIT_FAILURE;
      }
  
    try
      {
      passed = false;
      extractor->NarrowBandingOn();
      extractor->SetInputNarrowBand( NULL );
      extractor->Locate();
      }
    catch( itk::ExceptionObject& err )
      {
      std::cout << err << std::endl;
      passed = true;
      extractor->NarrowBandingOff();
      }
  
    if ( !passed )
      {
      std::cout << "Test failed" << std::endl;
      return EXIT_FAILURE;
      }
  
    std::cout << "Test passed." << std::endl;
    return EXIT_SUCCESS;
  
  }
  