old_contents: """Pytest configuration."""
  
  import pytest
  
  from xoinvader import application
  from xoinvader import state
  
  
  @pytest.fixture
  def mock_application(request):
  
      def inner():
          return MockedApplication()
  
      request.addfinalizer(MockedApplication._finalize)
      return inner
  
  
  @pytest.fixture
  def mock_state(request):
  
      def inner(mock_app=False):
          if mock_app:
              MockedApplication()
          application.get_current().register_state(MockedState)
          return application.get_current().state
  
      def stop():
          application.get_current().deregister_state(MockedState.__name__)
          if not application.get_current().states:
              MockedApplication._finalize()
  
      request.addfinalizer(stop)
  
      return inner
  
  
  class MockedApplication(application.Application):
  
      @staticmethod
      def _finalize():
          app = application.get_current()
          app.stop()
  
  
  class MockedState(state.State):
      pass
  
new_contents: """Pytest configuration."""
  
  import pytest
  
  from xoinvader import application
  from xoinvader import state
  
  
  @pytest.fixture
  def mock_application(request):
  
      def inner():
          return MockedApplication()
  
      request.addfinalizer(MockedApplication._finalize)
      return inner
  
  
  @pytest.fixture
  def mock_state(request, mock_application):
  
      def inner(mock_app=False):
          if mock_app:
              mock_application()
          application.get_current().register_state(MockedState)
          return application.get_current().state
  
      def stop():
          application.get_current().deregister_state(MockedState.__name__)
          if not application.get_current().states:
              MockedApplication._finalize()
  
      request.addfinalizer(stop)
  
      return inner
  
  
  class MockedApplication(application.Application):
  
      @staticmethod
      def _finalize():
          app = application.get_current()
          app.stop()
  
  
  class MockedState(state.State):
      pass
  
subject: use fixture to mock application