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Parallel Pester Tests
Install-Module -Name Pester -RequiredVersion 4.6.0 -force
$testFilePath = "./tests"
# Start a jobs running each of the test files
$testFiles = Get-ChildItem $testFilePath
$resultFileNumber = 0
foreach ($testFile in $testFiles)
{
$resultFileNumber++
$testName = Split-Path $testFile -leaf
# Create the job, be sure to pass argument in from the ArgumentList which
# are needed for inside the script block, they are NOT automatically passed.
Start-Job `
-ArgumentList $testFile, $resultFileNumber `
-Name $testName `
-ScriptBlock {
param($testFile, $resultFileNumber)
# Start trace for local debugging if TEST_LOG=true
# the traces will show you output in the ./testlogs folder and the files
# are updated as the tests run so you can follow along
if ($env:TEST_LOGS -eq "true") {
Start-Transcript -Path "./testlogs/$(Split-Path $testFile -leaf).integrationtest.log"
}
# Run the test file
Write-Host "$testFile to result file #$resultFileNumber"
$result = Invoke-Pester "$testFile"
if ($result.FailedCount -gt 0) {
throw "1 or more assertions failed"
}
}
}
# Poll to give insight into which jobs are still running so you can spot long running ones
do {
Write-Host ">> Still running tests @ $(Get-Date -Format "HH:mm:ss")" -ForegroundColor Blue
Get-Job | Where-Object { $_.State -eq "Running" } | Format-Table -AutoSize
Start-Sleep -Seconds 15
} while ((get-job | Where-Object { $_.State -eq "Running" } | Measure-Object).Count -gt 1)
# Catch edge cases by wait for all of them to finish
Get-Job | Wait-Job
$failedJobs = Get-Job | Where-Object { -not ($_.State -eq "Completed")}
# Receive the results of all the jobs, don't stop at errors
Get-Job | Receive-Job -AutoRemoveJob -Wait -ErrorAction 'Continue'
if ($failedJobs.Count -gt 0) {
Write-Host "Failed Jobs" -ForegroundColor Red
$failedJobs
throw "One or more tests failed"
}
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