text: import unittest
  
  import toga
  import toga_dummy
  from toga_dummy.utils import TestCase
  
  
  class NavigationViewTests(TestCase):
      @unittest.skip("Not implemented!")
      def setUp(self):
          super().setUp()
  
          self.title = 'Main View'
          self.content = toga.Box(factory=toga_dummy.factory)
          self.navi_view = toga.NavigationView(self.title,
                                               self.content,
                                               factory=toga_dummy.factory)
  
      def test_widget_created(self):
          self.assertEqual(self.switch._impl.interface, self.switch)
          self.assertActionPerformed(self.switch, 'create Switch')
  