ocrmypdf/tests/plugins/gs_pdfa_failure.py

# SPDX-FileCopyrightText: 2022 James R. Barlow
# SPDX-License-Identifier: MIT

from __future__ import annotations

from unittest.mock import patch

from ocrmypdf import hookimpl
from ocrmypdf.builtin_plugins import ghostscript
from ocrmypdf.subprocess import run_polling_stderr


def run_rig_args(args, **kwargs):
    # Remove the two arguments that tell ghostscript to create a PDF/A
    # Does not remove the Postscript definition file - not necessary
    # to cause PDF/A creation failure
    new_args = [
        arg for arg in args if not arg.startswith('-dPDFA') and not arg.endswith('.ps')
    ]
    proc = run_polling_stderr(new_args, **kwargs)
    return proc


@hookimpl
def generate_pdfa(pdf_pages, pdfmark, output_file, compression, pdf_version, pdfa_part):
    with patch('ocrmypdf._exec.ghostscript.run_polling_stderr') as mock:
        mock.side_effect = run_rig_args
        ghostscript.generate_pdfa(
            pdf_pages=pdf_pages,
            pdfmark=pdfmark,
            output_file=output_file,
            compression=compression,
            pdf_version=pdf_version,
            pdfa_part=pdfa_part,
            progressbar_class=None,
        )
        mock.assert_called()
        return output_file