code: def test_pdfa(resources, outpdf, optimize, pdfa_level):
      try:
          check_ocrmypdf(
              resources / "francais.pdf",
              outpdf,
              "--plugin",
              "tests/plugins/tesseract_noop.py",
              f"--output-type=pdfa-{pdfa_level}",
              f"--optimize={optimize}",
          )
      except MissingDependencyError as e:
          if (
              "pngquant" in str(e)
              and optimize in (2, 3)
              and os.name == "nt"
          ):
              pytest.xfail(
                  "pngquant currently not available on Windows"
              )
      if pdfa_level in (2, 3):
          # PDF/A-2 allows ObjStm
          assert b"/ObjStm" in outpdf.read_bytes()
      elif pdfa_level == 1:
          # PDF/A-1 might allow ObjStm, but Acrobat does not approve it, so
          # we don't use it
          assert b"/ObjStm" not in outpdf.read_bytes()
  
      with pikepdf.open(outpdf) as pdf:
          with pdf.open_metadata() as m:
              assert m.pdfa_status == f"{pdfa_level}B"
  
imports: from __future__ import annotations
  import os
  import pikepdf
  import pytest
  from ocrmypdf.exceptions import MissingDependencyError
  from .conftest import check_ocrmypdf
label_desc: Use image node_id 1 for calling a global function with example usage: test_pdfa(resources, outpdf, optimize, pdfa_level) without return types