Setup.ps1

[CmdletBinding(
    SupportsShouldProcess=$true #Tells the shell that your function supports both -confirm and -whatif.
    ,ConfirmImpact="High" #Causes Confirm prompt when $ConfirmPreference is "High"
)]
param ()


if (!([bool](([System.Security.Principal.WindowsIdentity]::GetCurrent()).groups -match "S-1-5-32-544"))){
    # http://superuser.com/questions/749243/detect-if-powershell-is-running-as-administrator
    throw "Setup.ps1 requires administrative privelages."
}


#Install Pester
If(!(get-module Pester -ListAvailable)) {
    If ($pscmdlet.ShouldProcess("Install Pester (https://github.com/pester/Pester)")) {
        Install-Module Pester -verbose
    }
}

# Note: This function is defined by Chocolatey as well but we have a script local version in case Chocolatey is not installed.
#       Also, this version sets the session instance of the enviroment variable.
Function Script:Set-EnvironmentVariable {
     [CmdletBinding(SupportsShouldProcess)]
     param(
          [ValidateScript({-not [string]::IsNullOrWhiteSpace($_)})][Parameter(Mandatory)][string]$Name,
          [Parameter(Mandatory)][string]$Value,
          [ValidateSet('User','Machine')][string]$Scope='User'
     )

     [string]$scopeArgs = $null
     if($Scope -eq 'Machine') {
         $scopeArgs = '/M'
     }
     setx.exe $Name $Value $scopeArgs | Out-Null
     Set-Item -Path Env:$Name -Value $Value
}


$PSToolboxPath=Join-Path $PSScriptRoot Modules
if($env:PSModulePath -notlike "*$PSToolboxPath*") {
    Script:Set-EnvironmentVariable -Name 'PSModulePath' -Value "$PSToolboxPath;$env:PSModulePath" 
    if($PSToolboxPath -notin ($env:PSModulePath -split ';')) {
        Write-Host -foreground Cyan $PSToolboxPath
        #NOTE: This does not test the change from [System.Environment]::SetEnvironmentVariable is permanent.
        throw "PSModulePath ('$env:PSModulePath') is not set with $PSToolboxPath"  
    }
}

If(Test-Path variable:\psise) {
    Function Test-CurrentFile {
        Invoke-Pester $psISE.CurrentFile.FullPath.Replace(".Tests","").Replace(".ps1",".Tests.ps1");
    }
    Set-Alias Test Test-CurrentFile
}