Утверждения для шпиона / макета / заглушки за шутку

Question

У меня есть этот сервис:

@Service()
export class HostelService {
    private readonly booking: Booking;

    constructor(bookingService: BookingService) {
        this.booking = bookingService.getBooking();
    }   
..
}

и на моем шутке

const booking = createMockInstance(Booking);
const bookingService: BookingService = ({
        getBooking: () => booking
} as unknown) as BookingService;
const bookingService = createMockInstance(BookingService);
const somethingSpy = jest.spyOn(booking, 'print');
expect(somethingSpy).toHaveBeenCalled();

метод print вызывается, но тест не пройден

Expected number of calls: >= 1
Received number of calls:    0