如何使用 Moq 和 xUnit 测试异步方法

Question

我有以下调用插入和更新方法的方法。

条件

1. 在下面的ProcessBspLoan 函数中，我正在调用另一个名为getBspData 的函数 如果getBspData 返回任何结果。我将插入结果 并更新数据库作为特定 ID 的成功

2. 如果getBspData 抛出任何异常，我将只更新数据库作为特定 ID 的失败，而不插入

这是给定类中的 ProcessBspLoan 函数

    public class BspLoanProcessor : IBspLoanProcessor
    {
        private readonly IBspClient _bspService;
        private readonly IBspRepository _bspRepository;
        private readonly ILogger<BspLoanProcessor> _logger;
        private readonly IMapper _mapper;
        private readonly IFhaRepository _fhaRepository;

        public BspLoanProcessor(IBspClient bspService, ILogger<BspLoanProcessor> logger, 
            IMapper mapper, IBspRepository bSPRepository, IFhaRepository fhaRepository)
        {
            _bspService = bspService;
            _logger = logger;
            _mapper = mapper;
            _bspRepository = bSPRepository;
            _fhaRepository = fhaRepository;
        }

        public async Task<bool> ProcessBspLoan(BspLoanDetails bspLoanDetails, string transactionId, string triggerType)
        {
            FhaTransactionDetails fhaData = _mapper.Map<FhaTransactionDetails>(bspLoanDetails);

            try
            {
                ////////////////////////////Calling getBspData///////////////////////////////////////
                var result = await _bspService.getBspData(bspLoanDetails.NsmLoanNumber, transactionId);

                result.TransactionId = transactionId;

                await _bspRepository.InsertBspResponse(result);
                
                await _fhaRepository.UpdateFhaTransactionWithLoanNumber(transactionId,"SUCCESS");
                return true;
            }
            catch(Exception ex)
            {
                await _fhaRepository.UpdateFhaTransactionWithLoanNumber(transactionId,"FAIL");
                return false;
            }
        }
    }

我为上述函数编写了测试方法，希望根据提供的输入检查它是返回真还是假

这是我的测试函数

    public async Task Test1Async()
    {
        Mock<IBspLoanProcessor> _bspLoanProcessor = new Mock<IBspLoanProcessor>();
        Mock<IBspRepository> _bspRepository = new Mock<IBspRepository>();
        Mock<IFhaRepository> _fhaRepository = new Mock<IFhaRepository>();
        Mock<IBspClient> _bspClient = new Mock<IBspClient>();
        BspLoanDetails bspLoanDetails = new BspLoanDetails
        {
            TriggerType = "BLOB",
            Attempts = 1,
            FirstRunDateTime = DateTime.Now.ToUniversalTime()
        };
        ----> 1
        _bspClient.Setup(x => x.getBspData(It.IsAny<string>(), It.IsAny<string>())).Returns(Task.FromResult(new BspResponseDetails()));
        ----> 2
        _bspRepository.Setup(x => x.InsertBspResponse(It.IsAny<BspResponseDetails>())).Returns(Task.CompletedTask);
        ----> 3
        _fhaRepository.Setup(x => x.UpdateFhaTransactionWithLoanNumber(It.IsAny<string>(),It.IsAny<string>())).Returns(Task.CompletedTask);
        bool value = await _bspLoanProcessor.Object.ProcessBspLoan(bspLoanDetails, "123", "SCHEDULE");
        Assert.True(value);
    }

在上面的测试中，我检查的是第一个条件

1. 每当有人调用获取数据时，我都会将数据作为对象返回
2. 插入BspResponsemethod 我也返回task.completedTask
3. UpdateFhaTransactionWithLoanNumber 我也回来了task.completedTask

实际的预期输出为真，但返回的是假。

我是 Moq 和 xUnit 的新手。请帮我解决这个问题并测试 async 和 await 方法。

IBspClient接口

    public interface IBspClient
    {
        Task<BspResponseDetails> getBspData(string loanNumber,string tid);

        Task<BspHealthCheck> GetHealthStatus();
    }

IBspRepository 接口

    public interface IBspRepository
    {
        Task InsertBspResponse(BspResponseDetails bsp);
    }

IFhaRepository 接口

    public interface IFhaRepository
    {
        Task UpdateFhaTransactionWithLoanNumber(string tid, string status);    
    }

提前致谢

Answer 1

bool value = await _bspLoanProcessor.Object

你在你的模拟上调用一个方法。你不应该模拟被测系统，你只模拟它的依赖关系。

只需 new 您要测试的类，否则您将测试您的模拟框架是否符合您的设置。

因为你没有设置ProcessBspLoan()，所以它返回默认值，所以false。