old_contents: 
  from gi.repository import Gtk
  import logging
  from gaphor.tests import TestCase
  from gaphor import UML
  from gaphor.diagram import items
  from gaphas.canvas import Context
  
  Event = Context
  
  logging.basicConfig(level=logging.DEBUG)
  
  class DiagramItemConnectorTestCase(TestCase):
      services = TestCase.services + [ 'main_window', 'ui_manager', 'action_manager', 'properties' ]
  
      def setUp(self):
          super(DiagramItemConnectorTestCase, self).setUp()
          mw = self.get_service('main_window')
          mw.open()
          mw.show_diagram(self.diagram)
          self.main_window = mw
  
      def test_item_reconnect(self):
          # Setting the stage:
  	ci1 = self.create(items.ClassItem, UML.Class)
          ci2 = self.create(items.ClassItem, UML.Class)
          a = self.create(items.AssociationItem)
  
          self.connect(a, a.head, ci1)
          self.connect(a, a.tail, ci2)
  
          self.assertTrue(a.subject)
          self.assertTrue(a.head_end.subject)
          self.assertTrue(a.tail_end.subject)
  
          the_association = a.subject
  
          # The act: perform button press event and button release
          view = self.main_window.get_current_diagram_view()
          
          self.assertSame(self.diagram.canvas, view.canvas)
  
          p = view.get_matrix_i2v(a).transform_point(*a.head.pos)
  
          event = Event(x=p[0], y=p[1], type=Gdk.EventType.BUTTON_PRESS, state=0)
  
          view.do_event(event)
  
          self.assertSame(the_association, a.subject)
  
          event = Event(x=p[0], y=p[1], type=Gdk.BUTTON_RELEASE, state=0)
  
          view.do_event(event)
  
          self.assertSame(the_association, a.subject)
  
  # vim:sw=4:et:ai
  
new_contents: 
  from gi.repository import Gtk
  import logging
  from gaphor.tests import TestCase
  from gaphor import UML
  from gaphor.diagram import items
  from gaphas.canvas import Context
  
  Event = Context
  
  logging.basicConfig(level=logging.DEBUG)
  
  class DiagramItemConnectorTestCase(TestCase):
      services = TestCase.services + [ 'main_window', 'ui_manager', 'action_manager', 'properties' ]
  
      def setUp(self):
          super(DiagramItemConnectorTestCase, self).setUp()
          mw = self.get_service('main_window')
          mw.open()
          mw.show_diagram(self.diagram)
          self.main_window = mw
  
      def test_item_reconnect(self):
          # Setting the stage:
          ci1 = self.create(items.ClassItem, UML.Class)
          ci2 = self.create(items.ClassItem, UML.Class)
          a = self.create(items.AssociationItem)
  
          self.connect(a, a.head, ci1)
          self.connect(a, a.tail, ci2)
  
          self.assertTrue(a.subject)
          self.assertTrue(a.head_end.subject)
          self.assertTrue(a.tail_end.subject)
  
          the_association = a.subject
  
          # The act: perform button press event and button release
          view = self.main_window.get_current_diagram_view()
          
          self.assertSame(self.diagram.canvas, view.canvas)
  
          p = view.get_matrix_i2v(a).transform_point(*a.head.pos)
  
          event = Event(x=p[0], y=p[1], type=Gdk.EventType.BUTTON_PRESS, state=0)
  
          view.do_event(event)
  
          self.assertSame(the_association, a.subject)
  
          event = Event(x=p[0], y=p[1], type=Gdk.BUTTON_RELEASE, state=0)
  
          view.do_event(event)
  
          self.assertSame(the_association, a.subject)
  
  # vim:sw=4:et:ai
  
subject: Fix inconsistent use of tabs and spaces