Mocking multiple objects in a class hierarchy

I spent a couple of days evaluating TypeMock.NET using simple examples. When I went on to try to apply it to a class in our real code I could not see how to proceed. Rather than send you the actual code, I created the code at the foot of this email to illustrate the essence of the issues.

The pages in our application are represented by the ConcretePage class which is derived from AbstractPage and BasePage. The constructors of all of these pages requires two arguments which I have represented as a PlaceHolder and a PageControl. However, when these classes are instantiated their instance variable are not initialised. So in the AbstractPage.Initialise method the aPageControl.Navigator is null. Also the Controls collection will also be null.

I am probably missing some key concept but I cannot see how to proceed and I cannot see how the examples relate to this (more or less) real life scenario.

Any assistance would be appreciated.

Thanks

John

PS I'm sorry this is a bit long winded but I want to make sure I can get TypeMock.NET working on a more realistic example before making any recommendations about using it.

using System;
using System.Collections.Generic;
using System.Text;
using System.Web.UI.WebControls;
using System.Data;
using NUnit.Framework;
using TypeMock;

namespace SimpleTypeMockExamples
{
    public abstract class BasePage
    {
        private List<System.Web.UI.Control> _Controls = new List<System.Web.UI.Control>();

        public List<System.Web.UI.Control> Controls
        {
            get { return _Controls; }
        }

        protected virtual void Initialise(PlaceHolder aPlaceHolder, PageControl aPageControl)
        {
            foreach (System.Web.UI.Control ctrl in aPageControl.Controls)
            {
                // Do something with the controls list - here I've just added them to another collection.
                _Controls.Add(ctrl);
            }

            // Do other things with aPlaceHolder

        }
    }

    public abstract class AbstractPage : BasePage
    {
        protected override void Initialise(PlaceHolder aPlaceHolder, PageControl aPageControl)
        {
            aPageControl.Navigator.OnPageReloadHandler += new PageReloadHandler(Navigator_OnPageReloadHandler);
            base.Initialise(aPlaceHolder, aPageControl);
        }

        void Navigator_OnPageReloadHandler(string message)
        {
            throw new Exception("The method or operation is not implemented.");
        }
    }

    public class ConcretePage : AbstractPage
    {
        public ConcretePage(PlaceHolder aPlaceHolder, PageControl aPageControl)
      {
            Initialise(aPlaceHolder, aPageControl);
      }
    }

    public delegate void PageReloadHandler(string message); 

    public class Navigator
    {
        public event SimpleTypeMockExamples.PageReloadHandler OnPageReloadHandler;
    }

    public class PageControl
    {
        private const int pageId = 1234;
        private List<System.Web.UI.Control> _Controls = null;
        private Navigator _Navigator;

        public Navigator Navigator
        {
            get { return _Navigator; }
            set { _Navigator = value; }
        }

        public List<System.Web.UI.Control> Controls
        {
            get { return _Controls; }
        }

        public void InitialiseControlsFromDatabase()
        {
            _Controls = DataLayer.GetControls(pageId);
        }

    }

    public class DataLayer
    {
        //
        // Dummy class that replaces the class(es) that access the database
        //
        public static List<System.Web.UI.Control> GetControls(int pageId)
        {
            // This method would read the page configurations containing
            // controls and their layouts as well as database views to 
            // populate the controls. 
            List<System.Web.UI.Control> controlsList = new List<System.Web.UI.Control>();
            //
            // Read the database and populate the controlsList
            //
            return controlsList;
        }
    }

    [TestFixture]
    class PageClassesTest
    {
        [Test]
        public void TestConstruction()
        {
            MockManager.Init();

            Mock mockNavigator = MockManager.Mock(typeof(Navigator));
            mockNavigator.ExpectAddEvent("OnPageReloadHandler");

            PageControl aPageControl = new PageControl();
            PlaceHolder aPlaceHolder = new PlaceHolder();

            ConcretePage dummyPage = new ConcretePage(aPlaceHolder, aPageControl);

            MockManager.Verify();
        }
    }

}