A minimalist example of PowerShell binary module (.NET DLL) that can be published to the PowerShell gallery as PowerShellGet package (aka NuGet).

To install the package, run:

Install-Module -Name PowerShellGet-Test-Binary-Module -Scope CurrentUser

The module contains a single Write-HelloWorld cmdlet, whose name is self-explanatory:

using System.Management.Automation;

[Cmdlet(VerbsCommunications.Write, "HelloWorld")]
public class HelloWorldCmdlet : Cmdlet
{
    protected override void BeginProcessing()
    {
        WriteObject("Hello, World!");
    }
}

(the System.Management.Automation reference is found at c:\Program Files (x86)\Reference Assemblies\Microsoft\WindowsPowerShell\3.0\System.Management.Automation.dll)

The module manifest stores NuGet-style package info:

@{
    RootModule = 'PowerShellGet-Test-Binary-Module.dll'
    ModuleVersion = '1.0.0.3'
    CmdletsToExport = '*'
    GUID = '95ee4cf1-d508-45a8-9680-203b71453f98'
    DotNetFrameworkVersion = '4.5.1'
    Author = 'Matthieu Maitre'
    Description = 'Example of PowerShellGet Binary Module'
    CompanyName = 'None'
    Copyright = '(c) 2016 Matthieu Maitre. All rights reserved.'
    PrivateData = @{
        PSData = @{
            ProjectUri = 'https://github.com/mmaitre314/PowerShellGet-Test-Binary-Module'
            LicenseUri = 'https://github.com/mmaitre314/PowerShellGet-Test-Binary-Module/blob/master/LICENSE'
            ReleaseNotes = ''
        }
    }
}

And a couple of scripts (Publish-ToTestRepo.ps1, Publish-ToPowerShellGallery.ps1) automate publication.

Unit-testing cmdlets requires a couple of tricks:

• The PowerShell host needs to be mocked (ICommandRuntime)
• Protected methods need to be accessed using PrivateObject

[TestMethod]
public void Test()
{
    var mock = new Mock<ICommandRuntime>();

    var cmdlet = new HelloWorldCmdlet
    {
        CommandRuntime = mock.Object
    };
    new PrivateObject(cmdlet).Invoke("BeginProcessing");

    mock.Verify(runtime => runtime.WriteObject("Hello, World!"), Times.Once);
}

This code was heavily inspired from AnPur's PowerShellGet-Module.