content: from django.test import TestCase
  
  from utilities.ordering import naturalize, naturalize_interface
  
  
  class NaturalizationTestCase(TestCase):
      """
      Validate the operation of the functions which generate values suitable for natural ordering.
      """
      def test_naturalize(self):
  
          # Original, naturalized
          data = (
              ('abc', 'abc'),
              ('123', '00000123'),
              ('abc123', 'abc00000123'),
              ('123abc', '00000123abc'),
              ('123abc456', '00000123abc00000456'),
              ('abc123def', 'abc00000123def'),
              ('abc123def456', 'abc00000123def00000456'),
          )
  
          for origin, naturalized in data:
              self.assertEqual(naturalize(origin, max_length=100), naturalized)
  
      def test_naturalize_max_length(self):
          self.assertEqual(naturalize('abc123def456', max_length=10), 'abc0000012')
  
      def test_naturalize_interface(self):
  
          # Original, naturalized
          data = (
  
              # IOS/JunOS-style
              ('Gi', '9999999999999999Gi..................'),
              ('Gi1', '9999999999999999Gi000001............'),
              ('Gi1.0', '9999999999999999Gi000001......000000'),
              ('Gi1.1', '9999999999999999Gi000001......000001'),
              ('Gi1:0', '9999999999999999Gi000001000000......'),
              ('Gi1:0.0', '9999999999999999Gi000001000000000000'),
              ('Gi1:0.1', '9999999999999999Gi000001000000000001'),
              ('Gi1:1', '9999999999999999Gi000001000001......'),
              ('Gi1:1.0', '9999999999999999Gi000001000001000000'),
              ('Gi1:1.1', '9999999999999999Gi000001000001000001'),
              ('Gi1/2', '0001999999999999Gi000002............'),
              ('Gi1/2/3', '0001000299999999Gi000003............'),
              ('Gi1/2/3/4', '0001000200039999Gi000004............'),
              ('Gi1/2/3/4/5', '0001000200030004Gi000005............'),
              ('Gi1/2/3/4/5:6', '0001000200030004Gi000005000006......'),
              ('Gi1/2/3/4/5:6.7', '0001000200030004Gi000005000006000007'),
  
              # Generic
              ('Interface 1', '9999999999999999Interface 000001............'),
              ('Interface 1 (other)', '9999999999999999Interface 000001............ (other)'),
              ('Interface 99', '9999999999999999Interface 000099............'),
              ('PCIe1-p1', '9999999999999999PCIe000001............-p00000001'),
              ('PCIe1-p99', '9999999999999999PCIe000001............-p00000099'),
  
          )
  
          for origin, naturalized in data:
              self.assertEqual(naturalize_interface(origin, max_length=100), naturalized)
  
      def test_naturalize_interface_max_length(self):
          self.assertEqual(naturalize_interface('Gi1/2/3', max_length=20), '0001000299999999Gi00')
  