Test Transient Error Handling in PowerShell

test.ps1

function Get-RandomSuccess {
  $val = Get-Random -Maximum 2

  $val -eq 0
}

function Get-RandomThrow {
  if (!(Get-RandomSuccess)) {
    throw "ERR"
  }
}

function Test-Function {
  for ($tries = 0; ; ++$tries) {
    try {
      $ret = Get-RandomThrow
      break
    } catch { 
      if ($tries -ge 3) {
        throw $_
      } else {
        Write-Host "Attempt $tries, waiting 1 second"
        Start-Sleep -Seconds 1
      }
    }
  }

  $ret
}

Test-Function