old_contents: import unittest
  from multiprocessing import Process
  
  from oct.core.devices import forwarder, streamer
  
  
  class DevicesTest(unittest.TestCase):
  
      def test_forwarder(self):
          """Should be able to start forwarder correctly
          """
          p = Process(target=forwarder, args=(0, 0))
          p.start()
          p.join(timeout=2)
          p.terminate()
  
      def test_streamer(self):
          """Should be able to start streamer
          """
          p = Process(target=streamer, args=(0, 0))
          p.start()
          p.join(timeout=2)
          p.terminate()
  
new_contents: import unittest
  from multiprocessing import Process
  
  from oct.core.devices import forwarder, streamer
  from oct.utilities.run_device import start_device, run_device
  
  
  class DummyArgs:
  
      device = 'forwarder'
      frontend = 0
      backend = 0
  
  
  class DevicesTest(unittest.TestCase):
  
      def test_forwarder(self):
          """Should be able to start forwarder correctly
          """
          p = Process(target=forwarder, args=(0, 0))
          p.start()
          p.join(timeout=1)
          p.terminate()
  
      def test_streamer(self):
          """Should be able to start streamer
          """
          p = Process(target=streamer, args=(0, 0))
          p.start()
          p.join(timeout=1)
          p.terminate()
  
      def test_start_device_function(self):
          """Should be able to start device with start_device function
          """
          p = Process(target=start_device, args=('streamer', 0, 0))
          p.start()
          p.join(timeout=1)
          p.terminate()
  
      def test_run_device_function(self):
          """Should be able start device with run_device function
          """
          p = Process(target=start_device, args=('forwarder', 0, 0))
          p.start()
          p.join(timeout=1)
          p.terminate()
  
subject: improve devices tests