new_contents: #!/usr/bin/env python
  # encoding: utf-8
  
  ################################################################################
  #
  #   RMG - Reaction Mechanism Generator
  #
  #   Copyright (c) 2002-2009 Prof. William H. Green (whgreen@mit.edu) and the
  #   RMG Team (rmg_dev@mit.edu)
  #
  #   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.
  #
  ################################################################################
  
  """
  This script contains unit tests of the :mod:`rmgpy.constraints` module.
  """
  
  import unittest
  
  from rmgpy.constraints import *
  
  ################################################################################
  
  class TestFailsSpeciesConstraints(unittest.TestCase):
      """
      Contains unit tests of the failsSpeciesConstraints function.
      """
              
      def testConstraintsNotLoaded(self):
          """
          Test what happens when constraints are not loaded.
          """
          from rmgpy.species import Species
  
          spc = Species().fromSMILES('C')
  
          fails = failsSpeciesConstraints(spc)
          self.assertFalse(fails)
subject: add constraintsTest