chromium/content/test/data/fenced_frames/ad_with_3pat_macro_reporting.html

<!DOCTYPE html>
<html>
<body>
<script>
  window.fence.reportEvent({
    destinationURL:
        'https://b.test/echo?a=${MACRO_A}&b=${MACRO_B}&c=${NOT_REGISTERED}'
  });
</script>
</body>
</html>