test.ps1

$ErrorActionPreference = 'Stop'

"dummy" | Out-File path-to.vmx
$env:PACKER_AZURE_AD_TENANT_ID = "dummy"
$env:PACKER_AZURE_SUBSCRIPTION_ID = "dummy"
$env:PACKER_AZURE_OBJECT_ID = "dummy"
$env:PACKER_AZURE_APP_ID = "dummy"
$env:PACKER_AZURE_CLIENT_SECRET = "dummy"
$env:PACKER_AZURE_RESOURCE_GROUP = "dummy"
$env:PACKER_AZURE_STORAGE_ACCOUNT = "dummy"
$env:AWS_S3_BUCKET = "dummy"

$files = @(Get-ChildItem *.json | Where-Object -FilterScript { $_.Name -ne "windows_7.json" })

foreach ($file in $files) {
  Write-Output "`n`nValidate $file"
  packer.exe validate -except=qemu $file
  if (-not $?) {
    throw "Packer validate found errors in $file!"
  }
}