问使用RhinoMocks 3.6的ArgumentNullException

EN

[TestMethod]
    public void GetItems_Returns_ActionItemsList()
    {
        // arrange
        var mockRepository = MockRepository.GenerateMock<IActionItemRepository>();
        mockRepository.Stub(s => s.Select()).Return(GetFakeActionItems());

        var service = new ActionItemQueueService(mockRepository);

        // act
        var actual = service.GetItems();

        mockRepository.VerifyAllExpectations();

        // assert
        Assert.IsInstanceOfType(actual, typeof(IList<ActionItem>));
    }

internal IQueryable<ActionItem> GetFakeActionItems()
    {
        return new List<ActionItem> {            
                                        new ActionItem{
                                            Id = 5,
                                            ClientName = "Bank of American Corporation",
                                            ActionNeeded = RequiredAction.Change,
                                            RecordIndicator = "ROI",
                                            RequestDate = DateTime.Now.AddDays(-3)
                                        } 
        } as IQueryable<ActionItem>;
    }

public class ActionItemQueueService : IActionQueueService
{
    private readonly IActionItemRepository _actionItemRepository;

    public ActionItemQueueService(IActionItemRepository actionItemRepository)
    {
        _actionItemRepository = actionItemRepository;
        if (_actionItemRepository == null)
        {
            throw new ArgumentNullException("ActionItemRepository");
        }
    }




    public IList<Model.ActionItem> GetItems()
    {
        return _actionItemRepository.Select().ToList<Model.ActionItem>();
    }
}