返回正确结果的最小起订量设置方法

Question

Need help is it possible to manage Moq setup like this

repositoryMock.Setup(s => s.Find(It.IsAny<object>())).Returns(() => DataList().FirstOrDefault(w => w.Id == It.IsAny<Guid>()));

Why I'm asking, because with this setup I always get return null, but if I put only to return DataList().FirstOrDefault(), it is returning correctly the first element in the list. My question is how I can manage DataList with "n" elements where element which I need will be in the middle and when mock setup is run to return if element exists?

Updates

private IList<Data> DataList()
{
        List<Data> dataList = new List<Data> {

            new Data
            {
                Id =  new Guid("299cd2b5-ab47-4006-9a47-c35e4770e9b1"),

            },
            new Data
            {
                Id = new Guid("279cd2b5-ab47-4006-9a47-c35e4770e9b1"),

            }
        };
        return dataList;
    }

Kind Regards,

Answer 1

如果你想至少返回一个对象。

repositoryMock.Setup(s => s.Find(It.IsAny<IBaseRepository>())).Returns(() => DataList().FirstOrDefault(w => w.Id == It.Is<Guid>()));

Answer 2

Capture the passed argument in the Returns delegate and use that to filter the list

repositoryMock
    .Setup(_ => _.Find(It.IsAny<object>()))
    .Returns((object arg) => {
        if(arg is Guid id)
            return DataList().FirstOrDefault(w => w.Id == id);
        return null;
    });

This assumes that the definition of the mocked member is IRepostory<T>.Find(object id) given the use of It.IsAny<object>() in the expectation expression.

If however the definition was IRepostory<T>.Find(Guid id) then the setup would be slightly different

repositoryMock
    .Setup(_ => _.Find(It.IsAny<Guid>()))
    .Returns((Guid id) => DataList().FirstOrDefault(w => w.Id == id));