public void testUndoCreateSlot() {
   Slot slot = createSlot();
   String name = slot.getName();
   assertNotNull("name", name);
   Frame frame = getFrame(name);
   assertEquals("created", slot, frame);
   assertTrue("can undo", _frameStore.canUndo());
   _frameStore.undo();
   frame = getFrame(name);
   assertNull("undone", frame);
   _frameStore.redo();
   frame = getFrame(name);
   assertEquals("recreated", frame.getName(), name);
 }
 public void testUndocreateCls() {
   Cls cls = createCls();
   String name = cls.getName();
   assertNotNull("name", name);
   Frame frame = getFrame(name);
   assertEquals("created", cls, frame);
   assertTrue("can undo", _frameStore.canUndo());
   _frameStore.undo();
   frame = getFrame(name);
   assertNull("undone", frame);
   _frameStore.redo();
   frame = getFrame(name);
   assertEquals("recreated", frame.getName(), name);
 }
 public void testUndoCreateSimpleInstance() {
   Cls cls = createCls();
   Instance instance = createSimpleInstance(cls);
   String name = instance.getName();
   assertNotNull("name", name);
   Frame frame = getFrame(name);
   assertEquals("created", instance, frame);
   assertTrue("can undo", _frameStore.canUndo());
   _frameStore.undo();
   frame = getFrame(name);
   assertNull("undone", frame);
   _frameStore.redo();
   instance = (Instance) getFrame(name);
   assertEquals("recreated", instance.getName(), name);
 }