text: #!/usr/bin/env python
  #
  # __COPYRIGHT__
  #
  # 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.
  #
  
  __revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
  
  """
  Verify that {Set,Get}Option('clean') works correctly to control
  cleaning behavior.
  """
  
  import os
  
  import TestSCons
  
  _python_ = TestSCons._python_
  
  test = TestSCons.TestSCons()
  
  test.write('build.py', r"""
  import sys
  with open(sys.argv[1], 'wb') as ofp, open(sys.argv[2], 'rb') as ifp:
      ofp.write(ifp.read())
  """)
  
  test.write('SConstruct', """
  DefaultEnvironment(tools=[])
  B = Builder(action = r'%(_python_)s build.py $TARGETS $SOURCES')
  env = Environment(tools=[], BUILDERS = { 'B' : B })
  env.B(target = 'foo.out', source = 'foo.in')
  
  mode = ARGUMENTS.get('MODE')
  if mode == 'not':
      assert not GetOption('clean')
  if mode == 'set-zero':
      assert GetOption('clean')
      SetOption('clean', 0)
      assert GetOption('clean')
  if mode == 'set-one':
      assert not GetOption('clean')
      SetOption('clean', 1)
      assert GetOption('clean')
  """ % locals())
  
  test.write('foo.in', '"Foo", I say!\n')
  
  test.run(arguments='foo.out MODE=not')
  test.must_match(test.workpath('foo.out'), '"Foo", I say!\n')
  
  test.run(arguments='-c foo.out MODE=set-zero')
  test.must_not_exist(test.workpath('foo.out'))
  
  test.run(arguments='foo.out MODE=none')
  test.must_match(test.workpath('foo.out'), '"Foo", I say!\n')
  
  test.run(arguments='foo.out MODE=set-one')
  test.must_not_exist(test.workpath('foo.out'))
  
  test.pass_test()
  
  # Local Variables:
  # tab-width:4
  # indent-tabs-mode:nil
  # End:
  # vim: set expandtab tabstop=4 shiftwidth=4:
  