Csharp 使用 .Moq 模拟返回 Guid 的方法

我正在使用干净的架构，并为我的应用层创建测试.我的问题是，测试用例失败是因为返回了一个空的Guid，即"00000000-0000-0000-0000-000000000000"，而不是用"CF0A8C1C-F2D0-41A1-A12C-53D9BE513A1C"填充

这是Fixture类:

public class MovieFixture
    {
        private readonly Mock<IMovieRepository> _movieRepository = new Mock<IMovieRepository>();
        private ServiceCollection ServiceCollection { get; } = new ServiceCollection();

        public CreateMovieCommandHandler CreateMovieCommandHandler
        {
            get
            {
                ServiceProvider serviceProvider = ServiceCollection.BuildServiceProvider();
                CreateMovieCommandHandler service = serviceProvider.GetRequiredService<CreateMovieCommandHandler>();
                return service;
            }
        }

        public MovieFixture()
        {
            var sampleGuid = new Guid("{CF0A8C1C-F2D0-41A1-A12C-53D9BE513A1C}");
            #region Movie command handler mocks

            // Create movie.
            _movieRepository
                .Setup(x => x.CreateAsync(_successMovie.ToMovieDomainModel()))
                .ReturnsAsync(sampleGuid);

            _movieRepository
                .Setup(x => x.CreateAsync(_failedMovie))
                .ReturnsAsync(Guid.Empty);

            #endregion

            #region Add transient services
            AddServices();
            #endregion
        }

        private void AddServices()
        {
            // Add repository mock
            _ = ServiceCollection.AddTransient(_ => _movieRepository.Object);

            // Add handlers
            _ = ServiceCollection.AddTransient<CreateMovieCommandHandler>();

            // Add validator
            _ = ServiceCollection.AddTransient<MovieValidator<CreateMovieCommand>>();
        }

        private CreateMovieCommand _successMovie = new CreateMovieCommand
        {
            Name = "success",
            Description = "test",
            IsActive = true,
            IsExpired = false,
            Image = "some-image.png",
            StartDate = DateTime.Now
        };

        private Movie _failedMovie = new Movie
        {
            Name = "failed",
            Description = "test",
            IsActive = true,
            IsExpired = false,
            Image = "some-image.png",
            StartDate = DateTime.Now
        };

这就是失败的实际测试用例

[Fact]
        public async Task Handle_WhenRepositoryReturnsSuccess_ShouldReturnUnitValue()
        {
            // Arrange
            Exception? exception = default;
            var handler = _movieFixture.CreateMovieCommandHandler;
            Unit result = default;

            // Act
            try
            {
                result = await handler.Handle(_successMovie, CancellationToken.None);
            }
            catch (Exception ex)
            {
                exception = ex;
            }

            //Assert
            exception.Should().BeNull();
            result.Should().Be(Unit.Value);
        }

这里也是命令处理程序.

public async Task<Unit> Handle(CreateMovieCommand request, CancellationToken cancellationToken)
        {
            var validationResult = await _validator.ValidateAsync(request).ConfigureAwait(false);

            if (validationResult.IsValid is false)
                throw new ValidationException(validationResult.Errors.FirstOrDefault()?.ToString());

            var result = await _movieRepository.CreateAsync(request.ToMovieDomainModel()).ConfigureAwait(false);

            if (result == Guid.Empty)
                throw new MovieCannotBeAddedException(ErrorMessages.MovieCannotBeAdded);

            return Unit.Value;
        }

希望有人能认出这个错误并帮助我.

祝你有愉快的一天.

我try 了.Returns(Task.FromResult(sampleGuid));种方法而不是.ReturnsAsync()种方法，但没有解决这个问题.我还try 为两个模拟生成唯一的随机Guid.NewGuid()，而不是变量sampleGuid.但又失败了.