old_contents: #!/usr/bin/env python
  """
  :Author Patrik Valkovic
  :Created 23.06.2017 16:39
  :Licence GNUv3
  Part of grammpy-transforms
  
  """
  
  from unittest import TestCase, main
  from grammpy import *
  from grammpy_transforms import *
  
  
  class RecursiveTest(TestCase):
      pass
  
  
  if __name__ == '__main__':
      main()
  
new_contents: #!/usr/bin/env python
  """
  :Author Patrik Valkovic
  :Created 23.06.2017 16:39
  :Licence GNUv3
  Part of grammpy-transforms
  
  """
  
  from unittest import TestCase, main
  from grammpy import *
  from grammpy_transforms import *
  
  
  class A(Nonterminal):
      pass
  
  
  class B(Nonterminal):
      pass
  
  
  class C(Nonterminal):
      pass
  
  
  class D(Nonterminal):
      pass
  
  
  class E(Nonterminal):
      pass
  
  
  class RuleAto0B(Rule):
      rule = ([A], [0, B])
  
  
  class RuleBto1(Rule):
      fromSymbol = B
      toSymbol = 1
  
  
  class RuleCto1D(Rule):
      rule = ([C], [1, D])
  
  
  class RuleDto0E(Rule):
      rule = ([D], [0, E])
  
  
  class RuleEto0C(Rule):
      rule = ([E], [0, C])
  
  
  class RecursiveTest(TestCase):
      def __init__(self, methodName):
          super().__init__(methodName)
          self.g = Grammar()
  
      def setUp(self):
          self.g = Grammar(terminals=[0, 1],
                           nonterminals=[A, B],
                           rules=[RuleAto0B, RuleBto1, RuleCto1D, RuleDto0E, RuleEto0C])
  
  
  if __name__ == '__main__':
      main()
  
subject: Add grammar for test of recursive grammar