text: import unittest
  from unittest.mock import MagicMock
  
  from samsung_multiroom.service.dlna import DlnaBrowser
  from samsung_multiroom.service.dlna import DlnaService
  
  
  def _get_service():
      api = MagicMock()
  
      service = DlnaService(api)
  
      return (service, api)
  
  
  class TestDlnaService(unittest.TestCase):
  
      def test_name(self):
          service, api = _get_service()
  
          self.assertEqual(service.name, 'dlna')
  
      def test_browser(self):
          service, api = _get_service()
  
          browser = service.browser
  
          self.assertIsInstance(browser, DlnaBrowser)
  
      def test_login(self):
          service, api = _get_service()
  
          service.login('test_username', 'test_password')
  
          api.set_sign_in.assert_not_called()
  
      def test_logout(self):
          service, api = _get_service()
  
          service.logout()
  
          api.set_sign_out.assert_not_called()
  