Moq VerifySet(Action) strange behaviour - moq

Question

I use Moq to test some behaviour. I want to verify set view's model property as new instance of Message class:
[TestFixture]
public class MessageFormPresenterTests
{
private NameValueCollection queryString;
private Mock<IDatabase> mockDatabase;
private Mock<HttpContextBase> mockHttpContext;
private Mock<HttpRequestBase> mockRequest;
private Mock<HttpResponseBase> mockResponce;
private Mock<IMessageFormView> mockView;
private MessageFormPresenter presenter;
[SetUp]
public void SetUp()
{
this.queryString = new NameValueCollection();
this.mockDatabase = new Mock<IDatabase>();
this.mockHttpContext = new Mock<HttpContextBase>();
this.mockRequest = new Mock<HttpRequestBase>();
this.mockResponce = new Mock<HttpResponseBase>();
this.mockView = new Mock<IMessageFormView>();
this.mockHttpContext.SetupGet(c => c.Request).Returns(this.mockRequest.Object);
this.mockHttpContext.SetupGet(c => c.Response).Returns(this.mockResponce.Object);
this.mockRequest.SetupGet(r => r.QueryString).Returns(this.queryString);
this.presenter = new MessageFormPresenter(this.mockView.Object) { Database = this.mockDatabase.Object, HttpContext = this.mockHttpContext.Object };
}
[Test]
public void ViewLoad_QueryStringNotHasMessageIdParameter_PopulateViewModelAsNewMessage()
{
// Act
this.mockView.Raise(v => v.Load += null, new EventArgs());
// Assert
this.mockView.VerifySet(v => v.Model = It.Is<Message>(m => m.Id == 0));
}
}
But this test pass even if i not write this functionality in my MessageFormPresenter. When i set breakpoint to action call (v.Model = It.Is(m => m.Id == 0)) and debug my test, Model property returned as "Castle.Proxies.MessageProxy" type and has all properties with default values (value of Id property is 0, of course).
Why is this happening? I don't setup anything to return and Moq should return null by default.
P.S. Excuse me for my poor english. I hope you understand what i'm talking about)
UPDATE1: MessageFormPresenter class:
public class MessageFormPresenter : Presenter<IMessageFormView>
{
private IDatabase database;
public MessageFormPresenter(IMessageFormView view)
: base(view)
{
View.Load += this.View_Load;
}
public IDatabase Database
{
get { return this.database ?? (this.database = DatabaseFactory.DatabaseInstance); }
set { this.database = value; }
}
private void View_Load(object sender, EventArgs e)
{
int messageId;
var messageParam = Request.QueryString[QueryParamNames.MessageId];
if (messageParam == null)
{
View.Model = new Message();
return;
}
if (!View.IsAdmin)
{
Response.Redirect(PageUrls.AccessDenied, true);
return;
}
if (int.TryParse(
messageParam,
NumberStyles.AllowLeadingWhite | NumberStyles.AllowTrailingWhite,
CultureInfo.InvariantCulture,
out messageId))
{
View.Model = this.Database.Single<Message>(messageId);
}
else
{
Response.Redirect(PageUrls.DefaultPage, true);
}
}
}
Base class Presenter<IMessageFormView> provided by WebFormsMvp framework.
UPDATE2: If i use strict behaviour TargetInvocationException will be thrown in base constructor of MessageFormPresenter, even if i setup all properties of Mock<IMessageFormView>.