text: #!/usr/bin/env python
  ###############################################################################
  # $Id$
  #
  # Project:  GDAL/OGR Test Suite
  # Purpose:  Test gdal_proximity.py script
  # Author:   Frank Warmerdam <warmerdam@pobox.com>
  # 
  ###############################################################################
  # Copyright (c) 2008, Frank Warmerdam <warmerdam@pobox.com>
  # Copyright (c) 2010, Even Rouault <even dot rouault at mines-paris dot org>
  # 
  # Permission is hereby granted, free of charge, to any person obtaining a
  # copy of this software and associated documentation files (the "Software"),
  # to deal in the Software without restriction, including without limitation
  # the rights to use, copy, modify, merge, publish, distribute, sublicense,
  # and/or sell copies of the Software, and to permit persons to whom the
  # Software is furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included
  # in all copies or substantial portions of the Software.
  # 
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  # DEALINGS IN THE SOFTWARE.
  ###############################################################################
  
  import os
  import sys
  
  sys.path.append( '../pymod' )
  
  import gdaltest
  import test_py_scripts
  
  from osgeo import gdal
  
  ###############################################################################
  # Test a fairly default case.
  
  def test_gdal_proximity_1():
  
      script_path = test_py_scripts.get_py_script('gdal_proximity')
      if script_path is None:
          return 'skip'
      
      drv = gdal.GetDriverByName( 'GTiff' )
      dst_ds = drv.Create('tmp/proximity_1.tif', 25, 25, 1, gdal.GDT_Byte )
      dst_ds = None
  
      test_py_scripts.run_py_script(script_path, 'gdal_proximity', '../alg/data/pat.tif tmp/proximity_1.tif' )
  
      dst_ds = gdal.Open('tmp/proximity_1.tif')
      dst_band = dst_ds.GetRasterBand(1)
  
      cs_expected = 1941
      cs = dst_band.Checksum()
      
      dst_band = None
      dst_ds = None
  
      if cs != cs_expected:
          print('Got: ', cs)
          gdaltest.post_reason( 'got wrong checksum' )
          return 'fail'
      else:
          return 'success' 
  
  ###############################################################################
  # Try several options
  
  def test_gdal_proximity_2():
  
      script_path = test_py_scripts.get_py_script('gdal_proximity')
      if script_path is None:
          return 'skip'
      
      test_py_scripts.run_py_script(script_path, 'gdal_proximity', '-q -values 65,64 -maxdist 12 -nodata -1 -fixed-buf-val 255 ../alg/data/pat.tif tmp/proximity_2.tif' )
  
      dst_ds = gdal.Open('tmp/proximity_2.tif')
      dst_band = dst_ds.GetRasterBand(1)
      
      cs_expected = 3256
      cs = dst_band.Checksum()
      
      dst_band = None
      dst_ds = None
  
      if cs != cs_expected:
          print('Got: ', cs)
          gdaltest.post_reason( 'got wrong checksum' )
          return 'fail'
      else:
          return 'success' 
  
  ###############################################################################
  # Try input nodata option
  
  def test_gdal_proximity_3():
  
      script_path = test_py_scripts.get_py_script('gdal_proximity')
      if script_path is None:
          return 'skip'
      
      test_py_scripts.run_py_script(script_path, 'gdal_proximity', '-q -values 65,64 -maxdist 12 -nodata 0 -use_input_nodata yes ../alg/data/pat.tif tmp/proximity_3.tif' )
  
      dst_ds = gdal.Open('tmp/proximity_3.tif')
      dst_band = dst_ds.GetRasterBand(1)
  
      cs_expected = 1465
      cs = dst_band.Checksum()
      
      dst_band = None
      dst_ds = None
  
      if cs != cs_expected:
          print('Got: ', cs)
          gdaltest.post_reason( 'got wrong checksum' )
          return 'fail'
      else:
          return 'success' 
  
  ###############################################################################
  # Cleanup
  
  def test_gdal_proximity_cleanup():
  
      lst = [ 'tmp/proximity_1.tif',
              'tmp/proximity_2.tif',
              'tmp/proximity_3.tif' ]
      for filename in lst:
          try:
              os.remove(filename)
          except:
              pass
  
      return 'success'
  
  gdaltest_list = [
      test_gdal_proximity_1,
      test_gdal_proximity_2,
      test_gdal_proximity_3,
      test_gdal_proximity_cleanup,
      ]
  
  if __name__ == '__main__':
  
      gdaltest.setup_run( 'test_gdal_proximity' )
  
      gdaltest.run_tests( gdaltest_list )
  
      gdaltest.summarize()
  
  