Moq does not return the value I set up

Question

I'm new to Moq. I'm trying to setup my Repository to return a value when called:

My test method:

 _userServiceMock.Setup(m => m.GetUserIDByUserName(It.IsAny<string>())).Returns(2);
 _bidRepositoryMock.Setup(m => m.Match(It.IsAny<Func<IQueryable<Bid>, object>>(),
                        It.IsAny<Expression<Func<Bid, object>>[]>())).Returns(new Bid{UserId = 2});
 var service = SetupService();
 var result = service.GetOwnBid(1, "testuser");

The userServiceMock returns 2 just as it should, but the bidRepositoryMock returns null.

The Method I'm unit testing looks like this:

  var bid = _bidRepository.Match(userBid => userBid.SingleOrDefault(b => b.ID == id),
                b => b.UserProfile,
                b => b.Task.UserProfile);

and the BidRepository Method Match Looks like this:

TResult Match<TResult>(Func<IQueryable<T>, TResult> query, params Expression<Func<T, object>>[] includes);

Answer 1

Try to change this code from It.IsAny<Func<IQueryable<Bid>, object>>() to It.IsAny<Func<IQueryable<Bid>, Bid>>()

_bidRepositoryMock.Setup(m => m.Match(It.IsAny<Func<IQueryable<Bid>, Bid>>(),
                        It.IsAny<Expression<Func<Bid, object>>[]>())).Returns(new Bid{UserId = 2});

Because you method returns the TResult type in your query it will be the Bid type.