Shims are not generated for .NET methods

Question

When I began using Microsoft Fakes, I was excited to start shimming some .NET methods. I was lead to believe that I would be able to shim ANY .NET method, static or not: http://msdn.microsoft.com/en-us/library/hh549176.aspx.

However, I've been trying to shim some of the methods in TcpClient and only stubs are created, which does me no good, since I want to be able to change some of the methods to return my own data rather than depending on a live TcpClient to give me data.

I'm open to any suggestions on how to do this if there is another way beyond Microsoft Fakes.

EDIT: Adding code to demonstrate the problem

[TestMethod]
public void CommunicationTest()
{
    var stubbedTcpClient = new System.Net.Sockets.Fakes.StubTcpClient
    {

    };

    //No such ShimTcpClient exists
    var shimmedTcpClient = new System.Net.Sockets.Fakes.ShimTcpClient
    {

    };
}

Can you share your code? Or at least enough to demonstrate the issue? — Ryan Gates
What method are you trying to shim? If it is virtual you can use NSubstitute, if not you are stuck using Fakes. — Ryan Gates
The Available and Connected properties as well as GetStream. I'll give NSubstitute a chance and see what happens. I'd still like to get a solid reason for why I can't seem to get any .NET classes to generate shim versions other than DateTime. — David J
Without the method being virtual or an interface (which GetStream() is neither) you will not be able to use NSubstitute. — Ryan Gates

David J David J · Accepted Answer · 2013-04-22T20:50:12

Got it working with help from this blog post and here.

The solution was to add the classes I wanted to shim explicitly in the System.fakes file. This is what mine looks like now:

<Fakes xmlns="http://schemas.microsoft.com/fakes/2011/">
  <Assembly Name="System" Version="4.0.0.0"/>
  <ShimGeneration>
    <Clear/>
    <Add FullName="System.Net.Sockets.TcpClient"/>
    <Remove Obsolete="1"/>
  </ShimGeneration>
</Fakes>

The Remove Obsolete="1" is to stop errors from being thrown by the Shim generation code when it attempts to shim [Obsolete] code.

Shims are not generated for .NET methods

2 Answers

Solution