old_contents: from __future__ import unicode_literals
  
  import unittest
  
  import six
  import spotify
  
  
  class ErrorTest(unittest.TestCase):
      def test_error_has_error_code(self):
          error = spotify.Error(0)
          self.assertEqual(error.error_code, 0)
  
          error = spotify.Error(1)
          self.assertEqual(error.error_code, 1)
  
      def test_error_has_error_message(self):
          error = spotify.Error(0)
          self.assertEqual(error.message, 'No error')
          self.assertIsInstance(error.message, six.text_type)
  
          error = spotify.Error(1)
          self.assertEqual(error.message, 'Invalid library version')
  
      def test_error_has_useful_repr(self):
          error = spotify.Error(0)
          self.assertEqual(repr(error), b"Error(u'No error',)")
  
      def test_error_has_useful_str(self):
          error = spotify.Error(0)
          self.assertEqual(str(error), 'No error')
  
      def test_error_has_error_constants(self):
          self.assertEqual(spotify.Error.OK, 0)
          self.assertEqual(spotify.Error.BAD_API_VERSION, 1)
  
new_contents: from __future__ import unicode_literals
  
  import unittest
  
  import six
  import spotify
  
  
  class ErrorTest(unittest.TestCase):
      def test_error_has_error_code(self):
          error = spotify.Error(0)
          self.assertEqual(error.error_code, 0)
  
          error = spotify.Error(1)
          self.assertEqual(error.error_code, 1)
  
      def test_error_has_useful_repr(self):
          error = spotify.Error(0)
          self.assertIn('No error', repr(error))
  
      def test_error_has_useful_string_representation(self):
          error = spotify.Error(0)
          self.assertEqual('%s' % error, 'No error')
          self.assertIsInstance('%s' % error, six.text_type)
  
          error = spotify.Error(1)
          self.assertEqual('%s' % error, 'Invalid library version')
  
      def test_error_has_error_constants(self):
          self.assertEqual(spotify.Error.OK, 0)
          self.assertEqual(spotify.Error.BAD_API_VERSION, 1)
  
subject: Make Error behavior consistent across Pythons