(chocolatey-community#4) Adds Windows Sandbox to Test-Package

This adds a really messy addition to the Test-Package function, which allows users to test package install/uninstall with Windows Sandbox rather than Vagrant or Local testing. 

It is not in my regular style but attempts to match the existing function. I'm not fully successful in this.

AU/Public/Test-Package.ps1

@@ -21,10 +21,12 @@
     https://github.com/chocolatey/choco/wiki/CreatePackages#testing-your-package
 #>
 function Test-Package {
+    [CmdletBinding(DefaultParameterSetName="Local")]
     param(
         # If file, path to the .nupkg or .nuspec file for the package.
         # If directory, latest .nupkg or .nuspec file wil be looked in it.
         # If ommited current directory will be used.
+        [Parameter(Position=0)]
         $Nu,
 
         # Test chocolateyInstall.ps1 only.
@@ -37,13 +39,28 @@ function Test-Package {
         [string] $Parameters,
 
         # Path to chocolatey-test-environment: https://github.com/majkinetor/chocolatey-test-environment
-        [string] $Vagrant = $Env:au_Vagrant,
+        [Parameter(ParameterSetName="Vagrant")]
+        [string] $Vagrant = $env:au_Vagrant,
 
+        [Parameter(ParameterSetName="Vagrant")]
         # Open new shell window
         [switch] $VagrantOpen,
 
         # Do not remove existing packages from vagrant package directory
-        [switch] $VagrantNoClear
+        [Parameter(ParameterSetName="Vagrant")]
+        [switch] $VagrantNoClear,
+
+        # Invokes the package test within Windows Sandbox, if available
+        [Parameter(ParameterSetName="Sandbox")]
+        [switch] $Sandbox,
+
+        # If set, does not destroy the Windows Sandbox instance or files.
+        [Parameter(ParameterSetName="Sandbox")]
+        [switch] $NoDestroy,
+
+        # Timeout for attempt to install and uninstall to Windows Sandbox, in minutes.
+        [Parameter(ParameterSetName="Sandbox")]
+        [uint16] $Timeout = 5
     )
 
     if (!$Install -and !$Uninstall) { $Install = $true }
@@ -68,7 +85,7 @@ function Test-Package {
         $Nu = Get-Item ([System.IO.Path]::Combine($Nu.DirectoryName, '*.nupkg')) | Sort-Object -Property CreationTime -Descending | Select-Object -First 1
     } elseif ($Nu.Extension -ne '.nupkg') { throw "File is not nupkg or nuspec file" }
 
-    #At this point Nu is nupkg file
+    # At this point Nu is nupkg file
 
     $package_name    = $Nu.Name -replace '(\.\d+)+(-[^-]+)?\.nupkg$'
     $package_version = ($Nu.BaseName -replace $package_name).Substring(1)
@@ -78,9 +95,103 @@ function Test-Package {
     Write-Host "  Name:".PadRight(15)      $package_name
     Write-Host "  Version:".PadRight(15)   $package_version
     if ($Parameters) { Write-Host "  Parameters:".PadRight(15) $Parameters }
-    if ($Vagrant)    { Write-Host "  Vagrant: ".PadRight(15) $Vagrant }
+
+    if ($Sandbox) {
+        if (-not (Get-Command WindowsSandbox -ErrorAction SilentlyContinue)) {
+            Write-Error "Windows Sandbox is not available. Please try Local or Vagrant methods." -ErrorAction Stop
+        }
+        Write-Host "`nTesting package using Windows Sandbox"
+
+        $SandboxTempFolder = Join-Path $env:TEMP "$(New-Guid)"
+        $null = New-Item -Path $SandboxTempFolder\ChocoTestingSandbox.wsb -Force -Value @"
+            <Configuration>
+                <Networking>Enable</Networking>
+                <MappedFolders>
+                    <MappedFolder>
+                        <HostFolder>$($SandboxTempFolder)</HostFolder>
+                        <SandboxFolder>C:\packages\</SandboxFolder>
+                        <ReadOnly>false</ReadOnly>
+                    </MappedFolder>
+                </MappedFolders>
+                <LogonCommand>
+                    <Command>C:\packages\Test-Package.cmd</Command>
+                </LogonCommand>
+            </Configuration>
+"@
+
+        $TestCommand = @(
+            'Start-Transcript -Path c:\packages\log.txt'
+            '$Results = @{}'
+            if ($Install) {
+                "choco install -y $package_name --version $package_version --no-progress --source `"'C:\packages\;https://community.chocolatey.org/api/v2/'`"$(if ($Parameters) {[string]::format(' --packageParameters="''{0}''"', $Parameters)}) | Write-Host"
+                '$Results.InstallExitCode = $LASTEXITCODE'
+            }
+            if ($Uninstall) {
+                "choco uninstall -y $package_name | Write-Host"
+                '$Results.UninstallExitCode = $LASTEXITCODE'
+            }
+            'Stop-Transcript'
+            'Copy-Item C:\ProgramData\chocolatey\logs\* -Destination C:\packages\'
+            '$Results | Export-Clixml -Path C:\packages\results.clixml'
+        ) -join '; '
+        $null = New-Item -Path $SandboxTempFolder\Test-Package.cmd -Value @"
+            @"%SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -InputFormat None -ExecutionPolicy Bypass -Command "iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))" && SET "PATH=%PATH%;%ALLUSERSPROFILE%\chocolatey\bin"
+            @"%SystemRoot%\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -InputFormat None -ExecutionPolicy Bypass -Command "$($TestCommand)"
+"@
+        Copy-Item -Path $Nu -Destination $SandboxTempFolder
+
+        try {
+            & WindowsSandbox "$SandboxTempFolder\ChocoTestingSandbox.wsb"
+
+            $Timer = [System.Diagnostics.Stopwatch]::StartNew()
+            $BytesShown = 0  # Nothing shown yet
+            while ($Timer.IsRunning -and $Timer.Elapsed.TotalMinutes -lt $Timeout) {
+                if (Test-Path $SandboxTempFolder\log.txt) {
+                    $Log = Get-Content $SandboxTempFolder\log.txt -Raw
+                    -join $Log[$BytesShown..$Log.Length] | Write-Host -NoNewLine
+                    $BytesShown = $Log.Length
+                }
+
+                if (Test-Path $SandboxTempFolder\results.clixml) {
+                    $Timer.Stop()
+                }
+
+                Start-Sleep -Milliseconds 500
+            }
+        } finally {
+            if (Test-Path $SandboxTempFolder\results.clixml) {
+                $Results = Import-Clixml $SandboxTempFolder\results.clixml
+
+                if ($Install) {
+                    if ($Results.InstallExitCode -ne 0) { throw "choco install failed with $($Results.InstallExitCode)"}
+                }
+                if ($Uninstall) {
+                    if ($Results.UninstallExitCode -ne 0) { throw "choco install failed with $($Results.UninstallExitCode)"}
+                }
+            } else {
+                Write-Error "Test failed after $($Timeout) minutes without a results file."
+            }
+
+            if (-not $NoDestroy) {
+                Get-Process WindowsSandboxClient | Stop-Process
+
+                $Tries = 0
+                while ($Tries++ -lt 4 -and (Test-Path $SandboxTempFolder)) {
+                    try {
+                        Remove-Item $SandboxTempFolder -Recurse -Force -ErrorAction Stop
+                    } catch {
+                        Start-Sleep -Seconds 1
+                    }
+                }
+            } else {
+                Write-Host "Logs and Results can be found in '$($SandboxTempFolder)'"
+            }
+        }
+        return
+    }
 
     if ($Vagrant) {
+        Write-Host "  Vagrant: ".PadRight(15) $Vagrant
         Write-Host "`nTesting package using vagrant"
 
         if (!$VagrantNoClear)  {
@@ -102,7 +213,7 @@ function Test-Package {
 
     if ($Install) {
         Write-Host "`nTesting package install"
-        choco install -y -r $package_name --version $package_version --source "'$($Nu.DirectoryName);https://chocolatey.org/api/v2/'" --force --packageParameters "'$Parameters'" | Write-Host
+        choco install -y -r $package_name --version $package_version --source "'$($Nu.DirectoryName);https://community.chocolatey.org/api/v2/'" --force --packageParameters "'$Parameters'" | Write-Host
         if ($LASTEXITCODE -ne 0) { throw "choco install failed with $LastExitCode"}
     }