public void ConfigureService_register_service(ServiceBuilder sut, ServiceConfigurator <IService> configurator)
        {
            sut.ConfigureService(configurator);

            Mock.Get(configurator).Verify(p => p.ConstructUsing(It.IsAny <ServiceFactory <IService> >()));

            Mock.Get(configurator).Verify(p => p.WhenStarted(It.IsAny <Func <IService, HostControl, bool> >()));

            Mock.Get(configurator).Verify(p => p.WhenStopped(It.IsAny <Func <IService, HostControl, bool> >()));
        }