new_contents: from unittest import TestCase, main
  import re
  from uuid import UUID
  
  from jsonrpcclient.id_iterators import hex_iterator, uuid_iterator, \
      random_iterator
  
  class TestHexIterator(TestCase):
  
      def test(self):
          i = hex_iterator()
          self.assertEqual('1', next(i))
          i = hex_iterator(9)
          self.assertEqual('9', next(i))
          self.assertEqual('a', next(i))
  
  
  class TestUUIDIterator(TestCase):
  
      def test(self):
          i = uuid_iterator()
          # Raise ValueError if badly formed hexadecimal UUID string
          UUID(next(i), version=4)
  
  
  class TestRandomIterator(TestCase):
  
      def test(self):
          i = random_iterator()
          self.assertTrue(re.match('^[0-9,a-z]{8}$', next(i)))
  
subject: Move iterator tests into separate file