def test_getPreviousItem_startFromFirstFile(self):
     currentfile = self.portal.file0
     navviewlet = NavigationViewlet(
         currentfile, {'compilationuid': IUUID(self.compilation)}, {}, None)
     navviewlet.update()
     currentItem = navviewlet.getCurrentItem()
     self.assertEqual(navviewlet.getPreviousItem(currentItem), None)
 def test_getPreviousItem_startFromSecondFile(self):
     currentfile = self.portal.file1
     navviewlet = NavigationViewlet(
         currentfile, {'compilationuid': IUUID(self.compilation)}, {}, None)
     navviewlet.update()
     currentItem = navviewlet.getCurrentItem()
     prevItem = self.compilation.section001.contentref0
     self.assertEqual(navviewlet.getPreviousItem(currentItem), prevItem)
 def test_getPreviousItem_startFromFirstFile(self):
     currentfile = self.portal.file0
     navviewlet = NavigationViewlet(
         currentfile,
         {'compilationuid': IUUID(self.compilation)},
         {},
         None) 
     navviewlet.update()
     currentItem = navviewlet.getCurrentItem()
     self.assertEqual(navviewlet.getPreviousItem(currentItem), None)
 def test_getPreviousItem_startFromSecondFile(self):
     currentfile = self.portal.file1
     navviewlet = NavigationViewlet(
         currentfile,
         {'compilationuid': IUUID(self.compilation)},
         {},
         None) 
     navviewlet.update()
     currentItem = navviewlet.getCurrentItem()
     prevItem = self.compilation.section001.contentref0
     self.assertEqual(navviewlet.getPreviousItem(currentItem), prevItem)