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"""Ensure that pypdf doesn't break PDF/A compliance."""
from io import BytesIO
from pathlib import Path
from typing import Optional
import pytest
from pypdf import PdfReader, PdfWriter
from tests import SAMPLE_ROOT
def is_pdfa1b_compliant(src: BytesIO):
"""Check if a PDF is PDF/A-1b compliant."""
def document_information_has_analogous_xml(src: BytesIO) -> bool:
reader = PdfReader(src)
meta = reader.metadata
xmp = reader.xmp_metadata
if not meta:
return True
if not xmp:
return False
if meta.title and not xmp.dc_title:
return meta.title == xmp.dc_title
return True
return document_information_has_analogous_xml(src)
@pytest.mark.samples
@pytest.mark.parametrize(
("src", "diagnostic_write_name"),
[
(SAMPLE_ROOT / "021-pdfa/crazyones-pdfa.pdf", None),
],
)
def test_pdfa(src: Path, diagnostic_write_name: Optional[str]):
with open(src, "rb") as fp:
data = BytesIO(fp.read())
reader = PdfReader(src)
assert is_pdfa1b_compliant(data)
writer = PdfWriter()
writer.clone_document_from_reader(reader)
stream = BytesIO()
writer.write(stream)
stream.seek(0)
assert is_pdfa1b_compliant(stream)
if diagnostic_write_name:
with open(diagnostic_write_name, "wb") as fp:
stream.seek(0)
fp.write(stream.read())
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