BACKGROUND

  • I am using Powershell 2.0 on Windows 7.
  • I am writing a cmdlet in a Powershell module ("module" is new to Powershell 2.0).
  • To test the cmdlet I am writing Unit tests in Visual Studio 2008 that programmatically invoke the cmdlet.

REFERENCE

  • This Article on MSDN called "How to Invoke a Cmdlet from Within a Cmdlet" shows how to call a cmdlet from C#.

THE SOURCE CODE

  • This is a distilled version of my actual code — I've made it as small as possible so that you can see the problem I am having clearly:

    using System;
using System.Management.Automation;   

namespace DemoCmdLet1
{
    class Program
    {
        static void Main(string[] args)
        {
            var cmd = new GetColorsCommand();

                foreach ( var i in cmd.Invoke<string>())
                {
                   Console.WriteLine("- " + i );   
                } 
           } 
       } 

    [Cmdlet("Get", "Colors")]
    public class GetColorsCommand : Cmdlet
    {
        protected override void ProcessRecord()
        {
            this.WriteObject("Hello");
            this.WriteVerbose("World");
        }

    }
}

COMMENTS

  • I understand how to enable and capture verbose output from the Powershell command line; that's not the problem.
  • In this case I am programmatically invoking the cmdlet from C#.
  • Nothing I've found addresses my specific scenario. Some articles suggest I should implement my own PSHost, but seems expensive and also it seems like a have to call the cmdlet as text, which I would like to avoid because that is not as strongly typed.

UPDATE ON 2009-07-20

Here is is the source code based on the answer below

c# powershell powershell-2.0 powershell-cmdlet
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