[Nmock-general] ExecutionEngineException with overloaded methods in VB.NET

[Chris B. <chr...@ho...>]

When ever I use NMock with overloaded methods in VB.NET I receive an 
ExecutionEngineException exception.

I have created a simple project to demonstrate the problem using a 
collection.


Interfaces:

Public Interface IFile

  ReadOnly Property FileName() As String

End Interface


Public Interface IFileCollection
  Inherits IList

  Overloads Sub Add(ByRef file As IFile)

End Interface


Factory class:

Imports NMock

Friend Class Factory

  Public Shared FileCollectionToReturn As Mock
  Public Shared FileToReturn As Mock

  Public Shared Sub Reset()

    FileCollectionToReturn = Nothing
    FileToReturn = Nothing

  End Sub

  Private Sub New()
  End Sub

  Public Shared Function GetFileCollection() As IFileCollection

    Return CType(FileCollectionToReturn.MockInstance, IFileCollection)

  End Function

  Public Shared Function GetFile() As IFile

    Return CType(FileToReturn.MockInstance, IFile)

  End Function

End Class


Class to test:

Public Class Sample

  Public Sub DoStuff()

    Dim file As IFile = Factory.GetFile()

    Dim collection As IFileCollection = Factory.GetFileCollection()

    collection.Add(file)

  End Sub

End Class


Test:

Imports NMock
Imports NUnit.Framework

<TestFixture()> _
Public Class SampleUnitTests

  <Test()> _
    Public Sub TestDoStuff()

    Factory.Reset()

    Dim collection As Mock = New DynamicMock(GetType(IFileCollection))
    Factory.FileCollectionToReturn = collection

    Dim file As Mock = New DynamicMock(GetType(IFile))
    Factory.FileToReturn = file

    collection.Expect("Add", file.MockInstance)

    Dim sampleClass As Sample = New Sample

    sampleClass.DoStuff()

    Collection.Verify()

  End Sub

End Class


If I do the same in C# it works as expected.

Any help would be very appreciated.

Regards,

Chris.