public/Test-EnvironmentVariable.ps1
#requires -Version 3 Set-StrictMode -Version Latest function Test-EnvironmentVariable{ <# .SYNOPSIS Determines whether all elements of a Environment Variable exist. .DESCRIPTION The Test-EnvironmentPath cmdlet determines whether all elements of the Environment Variable exist. It returns $True if all elements exist and $False if any are missing. .EXAMPLE PS C:\> Test-EnvironmentVariable "JAVA_*" True #> [CmdletBinding(DefaultParametersetName="Env")] Param( # Specifies a Path Name of the Environment Variable. [Parameter(Position=0, ParameterSetName="Env", ValueFromPipeline, ValueFromPipelineByPropertyName)] [string[]]$Name , # Specifies a Name of the Environment Variable. [Parameter(Position=0, Mandatory, ParameterSetName="LiteralName", ValueFromPipelineByPropertyName)] [string[]]$LiteralName ) Begin{ } Process{ $isLiteralName = $PsCmdlet.ParameterSetName -eq "LiteralName" if($isLiteralName){ $names = $LiteralName }else{ $names = $Name } if(($null -eq $names)){ $names = ,"*" } @($names) | ForEach-Object { $pattern = $_ if($isLiteralName){ (@(Get-EnvironmentVariable -LiteralName $pattern -ErrorAction SilentlyContinue).Count -ne 0) }else{ (@(Get-EnvironmentVariable -Name $pattern).Count -ne 0) } } } } |