[Rhino] Mock Anomalies: SetupResult.For to Lambda - "No Dice"

I had probably jumped to some conclusions with my earlier post.  While it's true GenerateStub<T>() refuses to accomodate SetupResult, the below testcase passes:

[TestMethod]

public void GenerateStubAndSetupResult()

{

    //With GenerateStub() alone, SetupResult fails with

    //IDemo stub = (IDemo)MockRepository.GenerateStub<IDemo>();

    IDemo stub = new MockRepository().Stub<IDemo>();

    int j = 0;

    SetupResult

        .For<string>(stub.ReturnStringNoArgs())

        .Do((Func<string>)(() => { return (++j).ToString(); }));

    SetupResult

        .For<string>(stub.ReturnStringWithInt32Arg(300)).IgnoreArguments()

        .Do((Func<int, string>)((arg) => { return string.Format("000{0}", arg); }));

    stub.Replay();

    Assert.AreEqual("1", stub.ReturnStringNoArgs());

    Assert.AreEqual("2", stub.ReturnStringNoArgs());

    Assert.AreEqual("000400", stub.ReturnStringWithInt32Arg(400));

    Assert.AreEqual("000500", stub.ReturnStringWithInt32Arg(500));

} 

Let's take our previous code and rewrite it, using the lesson above:

[TestMethod]

public void TestSetupStubOnceCallMultipleTimes2()

{

    //IDemo partialStub = MockRepository.GenerateStub<IDemo>();

    IDemo partialStub = new MockRepository().Stub<IDemo>();

    //This line does not work unless I have called the above .Stub<IDemo>

    //partialStub

    //    .Stub<IDemo, string>((x) => { return x.ReturnStringWithInt32Arg(30); })

    //    .IgnoreArguments()

    //    .Do(

    //        (Func<int, string>)((arg) =>

    //        {

    //            return string.Format(

    //                "{0}{1}",

    //                new string('0', 6 - arg.ToString().Length), arg);

    //        })

    //    );

    //If I comment the above line out, it gives me this error on SetupResult below

    //Test method ThinkFarAhead.LearningMocking.Expectations.SetupResult2.TestRhinoAndMoq.Working threw exception:

    //System.InvalidOperationException: Invalid call, the last call has been used or 

    //no call has been made (make sure that you are calling a virtual (C#) / Overridable (VB) method)..

    //This error occurs both when I create the Stub using MockRepository.GenerateStub<IDemo>() or new MockRepository().Stub<IDemo>()

    //SetupResult.For((Action<IDemo>)(x => x.ReturnStringWithInt32Arg(30))).IgnoreArguments()

    //  .Do((Func<int, string>)((arg) =>

    //  {

    //      return string.Format(

    //          "{0}{1}",

    //          new string('0', 6 - arg.ToString().Length), arg);

    //  }

    //    ));

    SetupResult

        .For(partialStub.ReturnStringWithInt32Arg(20))

        .IgnoreArguments()

        .Do((Func<int, string>)((arg) =>

            {

                return string.Format(

                    "{0}{1}",

                    new string('0', 6 - arg.ToString().Length), arg);

            }

        ));

    partialStub.Replay();

    Assert.AreEqual("000020", partialStub.ReturnStringWithInt32Arg(20));

    Assert.AreEqual("000030", partialStub.ReturnStringWithInt32Arg(30));

    Assert.AreEqual("000040", partialStub.ReturnStringWithInt32Arg(40));

}