new_contents: # coding: utf-8
  
  import unittest
  
  from kubernetes.client import Configuration
  
  class TestConfiguration(unittest.TestCase):
  
      def setUp(self):
          pass
  
      def tearDown(self):
          # reset Configuration
          Configuration.set_default(None)
  
      def testConfiguration(self):
          # check that different instances use different dictionaries
          c1 = Configuration()
          c2 = Configuration()
          self.assertNotEqual(id(c1.api_key), id(c2.api_key))
          self.assertNotEqual(id(c1.api_key_prefix), id(c2.api_key_prefix))
  
      def testDefaultConfiguration(self):
          # prepare default configuration
          c1 = Configuration(host="example.com")
          c1.debug = True
          Configuration.set_default(c1)
  
          # get default configuration
          c2 = Configuration.get_default_copy()
          self.assertEqual(c2.host, "example.com")
          self.assertTrue(c2.debug)
  
          self.assertNotEqual(id(c1.api_key), id(c2.api_key))
          self.assertNotEqual(id(c1.api_key_prefix), id(c2.api_key_prefix))
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: add a test for default configuration behavior