Assert-FolderExists.ps1

function Assert-FolderExists
{
  <#
    .SYNOPSIS
    Short Description
    .DESCRIPTION
    Detailed Description
    .EXAMPLE
    Assert-FolderExists
    explains how to use the command
    can be multiple lines
    .EXAMPLE
    Assert-FolderExists
    another example
    can have as many examples as you like
  #>

  [CmdletBinding()]
  param
  (
    [Parameter(Mandatory=$false, Position=0)]
    [System.Object]
    $Path = $destinationFolder
  )
  
  $existsDestination = Test-Path -Path $Path
  if ($existsDestination -eq $false)
  {
    $null = New-Item -Path $destinationFolder -Force -ItemType Directory
  }
}