Private/Invoke-Koan.ps1
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function Invoke-Koan { <# .SYNOPSIS Safely invokes Pester on a koan file in a fresh scope where tests can be executed out of harm's way. .DESCRIPTION Creates a new instance of PowerShell to execute the Pester tests in. Requires a valid parameter-splat hashtable for Invoke-Pester. .PARAMETER ParameterSplat Defines the hashtable that will be splatted into Invoke-Pester in the new PowerShell instance. .EXAMPLE Invoke-Koan @{ Script = '.\AboutArrays.Koans.ps1'; PassThru = $true; Show = 'None' } Triggers Pester to assess the AboutArrays file in the current directory and pass back the complete tests object, hiding the standard test results display. #> [CmdletBinding()] [OutputType([PSObject])] param( [Parameter(Position = 0, Mandatory)] [Alias('Params')] [hashtable] $ParameterSplat ) end { try { $Script = { param( $Params ) . ([scriptblock]::Create('using module PSKoans')) Invoke-Pester @Params } $Thread = [powershell]::Create() $Thread.AddScript($Script) > $null $Thread.AddArgument($ParameterSplat) > $null $Status = $Thread.BeginInvoke() do { } until ($Status.IsCompleted) $Thread.EndInvoke($Status) } finally { $Thread.Dispose() } } } |