Stubbing existing classes doesn't work like expected

[Wigman]

When stubbing a class i expect the original class code is not
executed. However, the following example does throw an exception("We
don't expect this to be thrown"). I thought stubs never failed a test.
What am I doing wrong here? How can i make Rhino stub the existing
class properly, so calling Test() does not give errors?

using System;
using NUnit.Framework;
using Rhino.Mocks;

namespace Roxit.Link.Test
{
[TestFixture]
public class RhinoTest
{
[Test]
public void TestStub()
{
Onzin onzin = MockRepository.GenerateStub<Onzin>();
onzin.Test();

}

public class Onzin
{
public void Test()
{
throw new Exception("We don't expect this to be
thrown");
}
}
}
}

[Jonathon Rossi]

The Test method is not virtual, so RhinoMocks cannot override it to do nothing.

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[Wigman]

Ok, now I know, thanx a million! Too bad i have to adjust the
'visibility' of my methods just to get the testing part in order.

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[Caio Kinzel Filho]

I think most of the time, when you are programming against interfaces
rather than against implementations, you will not have that problem,
once rhino.mocks can just implement that interface instead of
inheriting from your implementation

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[Tim Barcz]

I'll be honest in that I don't run into this problem very often because I almost always try to have an interface in there...and as Caio pointed out, it's not a problem that shows up when programming interfaces.

Tim

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[bill richards]

and just to add to these perfectly explanatory responses .... this i
the result of NOT developing your code in a test driven manner

On Jan 4, 8:48 pm, Tim Barcz <timba...@gmail.com> wrote:
> I'll be honest in that I don't run into this problem very often because I
> almost always try to have an interface in there...and as Caio pointed out,
> it's not a problem that shows up when programming interfaces.
>
> Tim
>
> On Mon, Jan 4, 2010 at 1:53 PM, Caio Kinzel Filho <cai...@gmail.com> wrote:
>
>
>
>
>
> > I think most of the time, when you are programming against interfaces
> > rather than against implementations, you will not have that problem,
> > once rhino.mocks can just implement that interface instead of
> > inheriting from your implementation
>

> Tim Barcz
> Microsoft C# MVP

> Microsoft ASPInsiderhttp://timbarcz.devlicio.ushttp://www.twitter.com/timbarcz- Hide quoted text -

[Wigman]

Well, excuse me, Bill. The Rhino documentation clearly states that
generating a stub will never fail a test. Well, it does! And there ARE
mock products that can actually create a thorough stub, stubbing all
methods of an existing class, virtual or not, so excuse me again for
my learning curve using Rhino. Saying test-driven developing means you
always create interface/virtuals for every class used in a test is new
for me too... and I sure hope you're wrong about it.

On Jan 4, 11:06 pm, bill richards <bill.richa...@greyskin.co.uk>
wrote:

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[Tim Barcz]

It's it not that the stub is causing your test to fail ... It is that
the stub can't quite do its job until some prerequisites are met...the
one here that you are running into is that stubbed methods need to be
virtual ( this is so that dynamic proxy can proxy the method )

Tim

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[bill richards]

Wigman,

from the tone of your response it seems that I have somehow offended
you. This was not my intention, I was merely attempting to highlight
the fact that had the code been develped in a TDD fashion you would
not have encountered this issue.

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