public async void ByPublicId_Not_Exists()
        {
            var mock = new ServiceMockFacade <IDeviceService, IDeviceRepository>();

            mock.RepositoryMock.Setup(x => x.ByPublicId(It.IsAny <Guid>())).Returns(Task.FromResult <Device>(null));
            var service = new DeviceService(mock.LoggerMock.Object,
                                            mock.MediatorMock.Object,
                                            mock.RepositoryMock.Object,
                                            mock.ModelValidatorMockFactory.DeviceModelValidatorMock.Object,
                                            mock.DALMapperMockFactory.DALDeviceMapperMock,
                                            mock.DALMapperMockFactory.DALDeviceActionMapperMock);

            ApiDeviceServerResponseModel response = await service.ByPublicId(default(Guid));

            response.Should().BeNull();
            mock.RepositoryMock.Verify(x => x.ByPublicId(It.IsAny <Guid>()));
        }