// then
assertThat(wrap(service(ToDoItems.class)).notYetComplete().size(), is(notYetCompletedSize-1));
assertThat(wrap(service(ToDoItems.class)).complete().size(), is(completedSize+1));
// and when
toDoItem.notYetCompleted();
// then
assertThat(wrap(service(ToDoItems.class)).notYetComplete().size(), is(notYetCompletedSize));
assertThat(wrap(service(ToDoItems.class)).complete().size(), is(completedSize));
}