text: import unittest
  import copy
  import datetime
  from anchore_engine.db import ImagePackageVulnerability
  
  
  class TestImagePackageVulnerabilityHashing(unittest.TestCase):
      def test_cmp(self):
          c1 = ImagePackageVulnerability()
          c1.pkg_name = 'testpkg1'
          c1.pkg_version = '1.0'
          c1.pkg_arch = 'x86'
          c1.pkg_type = 'rpm'
          c1.pkg_image_id = 'image123'
          c1.pkg_user_id = '0'
          c1.vulnerability_namespace_name = 'centos:6'
          c1.vulnerability_id = 'CVE-2016-123'
          c1.created_at = datetime.datetime.utcnow()
  
          c2 = copy.deepcopy(c1)
          self.assertEqual(c1, c2)
          c3 = copy.deepcopy(c1)
          self.assertEqual(c1, c3)
          c4 = copy.deepcopy(c1)
          self.assertEqual(c1, c4)
  
          c3.pkg_version = '1.1'
          c4.pkg_user_id = '1'
  
          self.assertEqual(c1, c2)
          self.assertNotEqual(c1, c4)
          self.assertNotEqual(c1, c3)
          self.assertListEqual(list({c1, c2, c3}), list({c1, c3}))
  
          print(('Set: {}'.format({c1, c2, c3})))
  
  if __name__ == '__main__':
      t = TestImagePackageVulnerabilityHashing()
      t.run()