Run Pester Tests parallel

parallel-pester-tests.ps1

# Example code of running multiple Pester test in parallel and merging the result into one NUnitReport Test Report file

#region Run Pester Test scripts in parallel
$job = Get-ChildItem -Path "./tests" -Filter "Demo*"
| ForEach-Object -Parallel { 
    Invoke-Pester -Path $_ -PassThru
} -ThrottleLimit 10 -AsJob
$Results = ($job | Wait-Job | Receive-Job -Keep)
#endregion


#region Create new Pester Object with merged parallel Pester Tests Results.
$Pester = [pester.Run]::new()
$results | ForEach-Object {
    $testresult = $_

    $pester.Containers += $testresult.Containers
    $pester.DiscoveryDuration += $testresult.DiscoveryDuration
    $pester.Duration += $testresult.Duration
    $pester.Executed += $testresult.Executed
    $pester.Failed += $testresult.Failed
    $pester.FailedBlocks += $testresult.FailedBlocks
    $pester.FailedBlocksCount += $testresult.FailedBlocksCount
    $pester.FailedContainers += $testresult.FailedContainers
    $pester.FailedContainersCount += $testresult.FailedContainersCount
    $pester.FailedCount += $testresult.FailedCount
    $pester.FrameworkDuration += $testresult.FrameworkDuration
    $pester.NotRun += $testresult.NotRun
    $pester.NotRunCount += $testresult.NotRunCount
    $pester.Passed += $testresult.Passed
    $pester.PassedCount += $testresult.PassedCount
    $pester.Result += $testresult.Result
    $pester.Skipped += $testresult.Skipped
    $pester.SkippedCount += $testresult.SkippedCount
    $pester.Tests += $testresult.Tests
    $pester.TotalCount += $testresult.TotalCount
    $pester.UserDuration += $testresult.UserDuration

}
#endregion

#region Export a Pester result-object to an NUnit-compatible XML-report
$pester | Export-NUnitReport -Path TestResultsFinal.xml
#endregion