text: from unittest.mock import patch, MagicMock
  
  from .assembly import Assembly
  import config
  
  test_config = config.get_config('test')
  
  
  @patch('src.assembly.Router')
  def test_start(mock_router):
      app_mock = MagicMock()
      mock_router = mock_router()
      mock_router.create_router.return_value = app_mock
      assembly = Assembly(test_config)
      assembly.start()
      app_mock.run.assert_called_once()
  
  