old_contents: """
  Braubuddy Dummy thermometer unit tests.
  """
  
  import unittest
  from mock import patch, call, MagicMock
  from braubuddy.thermometer import auto 
  from braubuddy.thermometer import dummy 
  from braubuddy.thermometer import ds18b20_gpio 
  from braubuddy.thermometer import temper_usb 
  from braubuddy.thermometer import DeviceError
  from braubuddy.thermometer import ReadError
  
  class TestAuto(unittest.TestCase):
  
      @patch('braubuddy.thermometer.ds18b20_gpio.ds18b20')
      @patch('braubuddy.thermometer.temper_usb.temperusb')
      def test_dummy_returned_if_no_devices(self, mk_temperusb, mk_ds18b20):
          """Dummy thermometer is created if no real thermometers discovered."""
  
          mk_ds18b20.DS18B20 = MagicMock(side_effect = Exception('Some Error'))
          mk_temperusb.TemperHandler.return_value.get_devices.return_value = []
          thermometer = auto.AutoThermometer()
          self.assertIsInstance(thermometer, dummy.DummyThermometer)
  
new_contents: """
  Braubuddy Auto thermometer unit tests.
  """
  
  import unittest
  from mock import patch, call, MagicMock
  from braubuddy.thermometer import auto 
  from braubuddy.thermometer import dummy 
  from braubuddy.thermometer import ds18b20_gpio 
  from braubuddy.thermometer import temper_usb 
  
  class TestAuto(unittest.TestCase):
  
      @patch('braubuddy.thermometer.ds18b20_gpio.ds18b20')
      @patch('braubuddy.thermometer.temper_usb.temperusb')
      def test_dummy_returned_if_no_devices(self, mk_temperusb, mk_ds18b20):
          """Dummy thermometer is created if no real thermometers discovered."""
  
          mk_ds18b20.DS18B20 = MagicMock(side_effect = Exception('Some Error'))
          mk_temperusb.TemperHandler.return_value.get_devices.return_value = []
          thermometer = auto.AutoThermometer()
          self.assertIsInstance(thermometer, dummy.DummyThermometer)
  
subject: Fix docstring and remove unnecessary imports.