public async void All() { var mock = new ServiceMockFacade <IStateProvinceRepository>(); var records = new List <StateProvince>(); records.Add(new StateProvince()); mock.RepositoryMock.Setup(x => x.All(It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult(records)); var service = new StateProvinceService(mock.LoggerMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.StateProvinceModelValidatorMock.Object, mock.BOLMapperMockFactory.BOLStateProvinceMapperMock, mock.DALMapperMockFactory.DALStateProvinceMapperMock, mock.BOLMapperMockFactory.BOLAddressMapperMock, mock.DALMapperMockFactory.DALAddressMapperMock); List <ApiStateProvinceResponseModel> response = await service.All(); response.Should().HaveCount(1); mock.RepositoryMock.Verify(x => x.All(It.IsAny <int>(), It.IsAny <int>())); }