I have tried to use Moq to unit test a method on a repository that uses the DetachedCriteria class. But I come up against a problem whereby I cannot actually mock the internal Criteria object that is built inside. Is there any way to mock detached criteria?

Test Method

        [Test]
        [Category("UnitTest")]
        public void FindByNameSuccessTest()
        {          
            //Mock hibernate here
            var sessionMock = new Mock<ISession>();
            var sessionManager = new Mock<ISessionManager>();
            var queryMock = new Mock<IQuery>();
            var criteria = new Mock<ICriteria>();
            var sessionIMock = new Mock<NHibernate.Engine.ISessionImplementor>();

            var expectedRestriction = new Restriction {Id = 1, Name="Test"};

            //Set up expected returns
            sessionManager.Setup(m => m.OpenSession()).Returns(sessionMock.Object);
            sessionMock.Setup(x => x.GetSessionImplementation()).Returns(sessionIMock.Object);

            queryMock.Setup(x => x.UniqueResult<SopRestriction>()).Returns(expectedRestriction);

            criteria.Setup(x => x.UniqueResult()).Returns(expectedRestriction);

            //Build repository            
            var rep = new TestRepository(sessionManager.Object);

            //Call repostitory here to get list
            var returnR = rep.FindByName("Test");


            Assert.That(returnR.Id == expectedRestriction.Id);
        }

Repository Class

public class TestRepository
{
    protected readonly ISessionManager SessionManager;

    public virtual ISession Session
    {
        get { return SessionManager.OpenSession(); }
    }

    public TestRepository(ISessionManager sessionManager)
    {
    }


    public SopRestriction FindByName(string name)
    {

        var criteria = DetachedCriteria.For<Restriction>().Add<Restriction>(x => x.Name == name)
        return criteria.GetExecutableCriteria(Session).UniqueResult<T>();
    }

}

Note I am using "NHibernate.LambdaExtensions" and "Castle.Facilities.NHibernateIntegration" here as well. Any help would be gratefully appreciated.