public async void Update()
        {
            var mock  = new ServiceMockFacade <ITenantVariableRepository>();
            var model = new ApiTenantVariableRequestModel();

            mock.RepositoryMock.Setup(x => x.Create(It.IsAny <TenantVariable>())).Returns(Task.FromResult(new TenantVariable()));
            mock.RepositoryMock.Setup(x => x.Get(It.IsAny <string>())).Returns(Task.FromResult(new TenantVariable()));
            var service = new TenantVariableService(mock.LoggerMock.Object,
                                                    mock.RepositoryMock.Object,
                                                    mock.ModelValidatorMockFactory.TenantVariableModelValidatorMock.Object,
                                                    mock.BOLMapperMockFactory.BOLTenantVariableMapperMock,
                                                    mock.DALMapperMockFactory.DALTenantVariableMapperMock);

            UpdateResponse <ApiTenantVariableResponseModel> response = await service.Update(default(string), model);

            response.Should().NotBeNull();
            mock.ModelValidatorMockFactory.TenantVariableModelValidatorMock.Verify(x => x.ValidateUpdateAsync(It.IsAny <string>(), It.IsAny <ApiTenantVariableRequestModel>()));
            mock.RepositoryMock.Verify(x => x.Update(It.IsAny <TenantVariable>()));
        }