// given
            int size = wrap(toDoItems).notYetComplete().size();
            nextTransaction();
            // when
            final ToDoItem newToDo = toDoItems.newToDo("new todo", ToDoItem.Category.Professional, ToDoItem.Subcategory.OpenSource, null, null);
            nextTransaction();
            // then
            assertThat(newToDo.getDescription(), is("new todo"));
            assertThat(newToDo.getCategory(), is(ToDoItem.Category.Professional));
            assertThat(wrap(toDoItems).notYetComplete().size(), is(size+1));
            assertThat(container().isPersistent(newToDo), is(true));
            assertThat(container().isPersistent(wrap(newToDo)), is(true));
            nextTransaction();
            // when
            newToDo.delete();
            nextTransaction();
            // then
            assertThat(wrap(toDoItems).notYetComplete().size(), is(size));
        }