pptx/malformed-non-zip

Metadata

XPath assertions

No XPath assertions declared.

Render assertions

No render assertions declared.

Generator source

scripts/gen_malformed_non_zip_pptx.py

#!/usr/bin/env python3
"""Generate ``fixtures/pptx/malformed-non-zip.pptx``.

A plain-UTF-8 text file with a ``.pptx`` extension. python-pptx must
raise a typed ``PackageNotFoundError`` (the upstream idiom), not a
bare ``zipfile.BadZipFile``.
"""

from __future__ import annotations

import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parent))
from _malformed_common import write_plain_bytes

_REPO_ROOT = Path(__file__).resolve().parent.parent
_OUT = _REPO_ROOT / "fixtures" / "pptx" / "malformed-non-zip.pptx"

_PAYLOAD = (
    b"This file has a .pptx extension but is plain UTF-8 text, not a "
    b"ZIP archive. A conforming reader must reject it with a typed "
    b"opc-level exception, not a bare zipfile.BadZipFile.\n"
) * 4


def main() -> int:
    _OUT.parent.mkdir(parents=True, exist_ok=True)
    write_plain_bytes(_OUT, _PAYLOAD)
    print(_OUT)
    return 0


if __name__ == "__main__":
    raise SystemExit(main())

Manifest (expanded)

{
  "id": "pptx/malformed-non-zip",
  "title": "Malformed input: file is not a ZIP archive",
  "format": "pptx",
  "category": "malformed-recovery",
  "summary": "A plain-UTF-8 text file with a .pptx extension. The library must raise a typed opc-level exception; a bare zipfile.BadZipFile leaks implementation detail.",
  "roles": [
    "authoring"
  ],
  "spec": {
    "source": "ecma-376-5-part-2",
    "clause": "10.1.1",
    "element": "Package",
    "notes": "An OPC package is a ZIP. Not-a-zip input is the most basic 'reject gracefully' case."
  },
  "fixtures": {
    "machine": "pptx/malformed-non-zip"
  },
  "generator": {
    "python": "scripts/gen_malformed_non_zip_pptx.py"
  },
  "behavior_assertions": [
    {
      "id": "raises-typed-exception",
      "kind": "library_raises",
      "library": "python-pptx",
      "method": "pptx.Presentation",
      "args": [
        "{fixture_path}"
      ],
      "expected_exception": [
        "PackageNotFoundError",
        "OpcError"
      ],
      "forbidden_exception": "BadZipFile",
      "description": "Must raise a typed opc exception — NOT a bare zipfile.BadZipFile."
    }
  ]
}