public async void TransactionsByTransactionStatusId_Not_Exists() { var mock = new ServiceMockFacade <ITransactionStatusService, ITransactionStatusRepository>(); mock.RepositoryMock.Setup(x => x.TransactionsByTransactionStatusId(default(int), It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult <List <Transaction> >(new List <Transaction>())); var service = new TransactionStatusService(mock.LoggerMock.Object, mock.MediatorMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.TransactionStatusModelValidatorMock.Object, mock.DALMapperMockFactory.DALTransactionStatusMapperMock, mock.DALMapperMockFactory.DALTransactionMapperMock); List <ApiTransactionServerResponseModel> response = await service.TransactionsByTransactionStatusId(default(int)); response.Should().BeEmpty(); mock.RepositoryMock.Verify(x => x.TransactionsByTransactionStatusId(default(int), It.IsAny <int>(), It.IsAny <int>())); }