| import hashlib |
| import io |
| import json |
| from pathlib import Path |
| import tarfile |
| import tempfile |
| import unittest |
|
|
| from materialize_agent_context import materialize |
|
|
|
|
| class MaterializeTests(unittest.TestCase): |
| def fixture(self, root, member='Dockerfile', payload=b'FROM scratch\n'): |
| root = Path(root) |
| archive = root / 'context.tar.gz' |
| with tarfile.open(archive, 'w:gz') as tar: |
| info = tarfile.TarInfo(member) |
| info.size = len(payload) |
| info.mode = 0o644 |
| tar.addfile(info, io.BytesIO(payload)) |
| data = archive.read_bytes() |
| record = {'archive': {'path': archive.name, 'sha256': hashlib.sha256(data).hexdigest(), 'bytes': len(data)}, |
| 'files': [{'path': member, 'sha256': hashlib.sha256(payload).hexdigest(), 'bytes': len(payload), 'mode': 0o644}]} |
| (root / 'context-manifest.json').write_text(json.dumps(record)) |
| return root / 'context-manifest.json' |
|
|
| def test_exact_context_is_restored(self): |
| with tempfile.TemporaryDirectory() as temp: |
| record = self.fixture(temp) |
| out = Path(temp) / 'out' |
| materialize(record, out) |
| self.assertEqual((out / 'Dockerfile').read_bytes(), b'FROM scratch\n') |
|
|
| def test_tampered_archive_is_rejected_before_extraction(self): |
| with tempfile.TemporaryDirectory() as temp: |
| record = self.fixture(temp) |
| with (Path(temp) / 'context.tar.gz').open('ab') as stream: |
| stream.write(b'changed') |
| with self.assertRaises(ValueError): |
| materialize(record, Path(temp) / 'out') |
| self.assertFalse((Path(temp) / 'out').exists()) |
|
|
| def test_traversal_member_is_rejected(self): |
| with tempfile.TemporaryDirectory() as temp: |
| record = self.fixture(temp, '../escape') |
| with self.assertRaises(ValueError): |
| materialize(record, Path(temp) / 'out') |
| self.assertFalse((Path(temp) / 'escape').exists()) |
|
|
| def test_existing_output_is_preserved(self): |
| with tempfile.TemporaryDirectory() as temp: |
| record = self.fixture(temp) |
| out = Path(temp) / 'out' |
| out.mkdir() |
| (out / 'keep').write_text('preserve') |
| with self.assertRaises(FileExistsError): |
| materialize(record, out) |
| self.assertEqual((out / 'keep').read_text(), 'preserve') |
|
|
| def test_unlisted_member_is_rejected(self): |
| with tempfile.TemporaryDirectory() as temp: |
| record = self.fixture(temp) |
| data = json.loads(record.read_text()) |
| data['files'] = [] |
| record.write_text(json.dumps(data)) |
| with self.assertRaises(ValueError): |
| materialize(record, Path(temp) / 'out') |
|
|
|
|
| if __name__ == '__main__': |
| unittest.main() |
|
|
