c# - Moq 验证是否使用任何表达式调用了 Method

Question

我是 Moq 的新手，我正在尝试模拟我的存储库。

我正在为其编写单元测试的方法是这样调用存储库：

var paymentState = _agreementPaymentStateRepository.SingleOrDefault(
                         s => s.Agreement.ID == agreementID);

我正在尝试像这样设置我的起订量：

_agreementPaymentStateRepositoryMock
         .Setup(m => m.SingleOrDefault(s => s.AgreementID == 1))
         .Returns(AgreementPayMentStateMocks.GetOne);

我将我的模拟存储库传递给该类，但在调用后 paymentState 变量为空。（我也很乐意跳过指定表达式）。

任何帮助深表感谢。

public PaymentState GetPaymentState(int agreementID)
    {
        try
        {
            _log.AgreementPaymentStateServiceGetStateStart(agreementID);
            var paymentState =
                _agreementPaymentStateRepository.SingleOrDefault(s => s.Agreement.ID == agreementID);

            var stateToGet = MapStateToGet(paymentState);

            _log.AgreementPaymentStateServiceGetStateReturn(agreementID, paymentState.LatestStatus);
            return stateToGet;
        }
        catch (Exception ex)
        {
            _log.ServiceException(ex.ToString());
            throw;
        }
    }

和测试：

 var paymentState = AgreementPayMentStateMocks.GetPayMentState();

        _agreementPaymentStateRepositoryMock.Setup(m => m.SingleOrDefault(s => s.AgreementID == 1)).Returns(AgreementPayMentStateMocks.GetOne);

        var service = new AgreementPaymentStateService(_agreementPaymentStateRepositoryMock.Object, _log.Object);
        var result = service.GetPaymentState(1);

        _agreementPaymentStateRepositoryMock.Verify(m => m.Match(aps => aps.SingleOrDefault(s => s.AgreementID == 1)), Times.Exactly(1));

Answer 1

不要在SingleOrDefault调用中使用具体的谓词，而是使用 Moq 的It.IsAny<T>方法：

_agreementPaymentStateRepositoryMock
         .Setup(m => m.SingleOrDefault(It.IsAny<Expression<Func<bool,PaymentState>>>()))
         .Returns(AgreementPayMentStateMocks.GetOne);