old_contents: from unittest import TestCase
  
  
  class ExceptionsTestCase(TestCase):
  
      def _get(self):
          from kazoo import exceptions
          return exceptions
  
      def test_backwards_alias(self):
          module = self._get()
          self.assertTrue(getattr(module, 'NoNodeException'))
          self.assertTrue(module.NoNodeException, module.NoNodeError)
  
      def test_exceptions_code(self):
          module = self._get()
          exc_8 = module.EXCEPTIONS[-8]
          self.assertTrue(isinstance(exc_8(), module.BadArgumentsError))
  
      def test_invalid_code(self):
          module = self._get()
          self.assertRaises(RuntimeError, module.EXCEPTIONS.__getitem__, 666)
  
new_contents: from unittest import TestCase
  
  
  class ExceptionsTestCase(TestCase):
  
      def _get(self):
          from kazoo import exceptions
          return exceptions
  
      def test_backwards_alias(self):
          module = self._get()
          self.assertTrue(getattr(module, 'NoNodeException'))
          self.assertTrue(module.NoNodeException, module.NoNodeError)
  
      def test_exceptions_code(self):
          module = self._get()
          exc_8 = module.EXCEPTIONS[-8]
          self.assertTrue(isinstance(exc_8(), module.BadArgumentsError))
  
      def test_invalid_code(self):
          module = self._get()
          self.assertRaises(RuntimeError, module.EXCEPTIONS.__getitem__, 666)
  
      def test_exceptions_construction(self):
          module = self._get()
          exc = module.EXCEPTIONS[-101]()
          assert type(exc) is module.NoNodeError
          assert exc.args == ()
  
subject: add test for new exception construction behavior