new_contents: import unittest
  from cryptos.dhke import DHKEInvoker, DHKEParty
  
  class TestDHKE(unittest.TestCase):
  
      def test_consistency(self):
          for x in range(1000):
              invoker = DHKEInvoker()
              other = DHKEParty(invoker.get_param())
              other.receive_partial_key(invoker.get_partial_key())
              invoker.receive_partial_key(other.get_partial_key())
              assert(invoker.get_key() == other.get_key())
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Add dhke tests