public async Task Then_Message_Handler_Called()
        {
            //Arrange
            var handler = new Mock <IReservationIndexRefreshHandler>();

            //Act
            await RefreshIndex.Run(null,
                                   Mock.Of <ILogger <ReservationIndexRefreshHandler> >(),
                                   handler.Object);

            //Assert
            handler.Verify(s => s.Handle(), Times.Once);
        }