old_contents: import mock
  
  from mopidy import settings
  from mopidy.backends import dummy as backend
  from mopidy.frontends import mpd
  from mopidy.mixers import dummy as mixer
  
  from tests import unittest
  
  
  class MockConnetion(mock.Mock):
      def __init__(self, *args, **kwargs):
          super(MockConnetion, self).__init__(*args, **kwargs)
          self.host = mock.sentinel.host
          self.port = mock.sentinel.port
          self.response = []
  
      def queue_send(self, data):
          lines = (line for line in data.split('\n') if line)
          self.response.extend(lines)
  
  
  class BaseTestCase(unittest.TestCase):
      def setUp(self):
          self.backend = backend.DummyBackend.start().proxy()
          self.mixer = mixer.DummyMixer.start().proxy()
  
          self.connection = MockConnetion()
          self.session = mpd.MpdSession(self.connection)
          self.dispatcher = self.session.dispatcher
          self.context = self.dispatcher.context
  
      def tearDown(self):
          self.backend.stop().get()
          self.mixer.stop().get()
          settings.runtime.clear()
  
      def sendRequest(self, request):
          self.connection.response = []
          request = '%s\n' % request.encode('utf-8')
          self.session.on_receive({'received': request})
          return self.connection.response
  
      def assertNoResponse(self):
          self.assertEqual([], self.connection.response)
  
      def assertInResponse(self, value):
          self.assert_(value in self.connection.response, u'Did not find %s '
              'in %s' % (repr(value), repr(self.connection.response)))
  
      def assertOnceInResponse(self, value):
          matched = len([r for r in self.connection.response if r == value])
          self.assertEqual(1, matched, 'Expected to find %s once in %s' %
              (repr(value), repr(self.connection.response)))
  
      def assertNotInResponse(self, value):
          self.assert_(value not in self.connection.response, u'Found %s in %s' %
              (repr(value), repr(self.connection.response)))
  
      def assertEqualResponse(self, value):
          self.assertEqual(1, len(self.connection.response))
          self.assertEqual(value, self.connection.response[0])
  
new_contents: import mock
  
  from mopidy import settings
  from mopidy.backends import dummy as backend
  from mopidy.frontends import mpd
  from mopidy.mixers import dummy as mixer
  
  from tests import unittest
  
  
  class MockConnection(mock.Mock):
      def __init__(self, *args, **kwargs):
          super(MockConnection, self).__init__(*args, **kwargs)
          self.host = mock.sentinel.host
          self.port = mock.sentinel.port
          self.response = []
  
      def queue_send(self, data):
          lines = (line for line in data.split('\n') if line)
          self.response.extend(lines)
  
  
  class BaseTestCase(unittest.TestCase):
      def setUp(self):
          self.backend = backend.DummyBackend.start().proxy()
          self.mixer = mixer.DummyMixer.start().proxy()
  
          self.connection = MockConnection()
          self.session = mpd.MpdSession(self.connection)
          self.dispatcher = self.session.dispatcher
          self.context = self.dispatcher.context
  
      def tearDown(self):
          self.backend.stop().get()
          self.mixer.stop().get()
          settings.runtime.clear()
  
      def sendRequest(self, request):
          self.connection.response = []
          request = '%s\n' % request.encode('utf-8')
          self.session.on_receive({'received': request})
          return self.connection.response
  
      def assertNoResponse(self):
          self.assertEqual([], self.connection.response)
  
      def assertInResponse(self, value):
          self.assert_(value in self.connection.response, u'Did not find %s '
              'in %s' % (repr(value), repr(self.connection.response)))
  
      def assertOnceInResponse(self, value):
          matched = len([r for r in self.connection.response if r == value])
          self.assertEqual(1, matched, 'Expected to find %s once in %s' %
              (repr(value), repr(self.connection.response)))
  
      def assertNotInResponse(self, value):
          self.assert_(value not in self.connection.response, u'Found %s in %s' %
              (repr(value), repr(self.connection.response)))
  
      def assertEqualResponse(self, value):
          self.assertEqual(1, len(self.connection.response))
          self.assertEqual(value, self.connection.response[0])
  
subject: Fix typo