| import hashlib |
| import io |
| import json |
| import os |
| from pathlib import Path |
| import tarfile |
| import tempfile |
| import unittest |
| from materialize_agent_context import materialize |
|
|
|
|
| def fixture(root, target='/testbed/npm/pacote', declared=True, wrong_blob=False): |
| expected = '/testbed/npm/pacote' |
| blob = hashlib.sha1(b'blob ' + str(len(expected)).encode() + b'\0' + expected.encode()).hexdigest() |
| link = {'path': 'node_modules/pacote', 'original_target': expected, 'expected_blob': '0' * 40 if wrong_blob else blob, 'target_repository': 'provider'} |
| instance = {'repositories': [{'key': 'cli', 'path': '/testbed/npm/cli', 'workspace_links': [link] if declared else []}, |
| {'key': 'provider', 'path': expected, 'workspace_links': []}]} |
| payload = {'instance.json': json.dumps(instance).encode(), 'testbed/npm/pacote/package.json': b'{}'} |
| archive = root / 'context.tar.gz'; entries = [] |
| with tarfile.open(archive, 'w:gz') as tf: |
| for name, data in payload.items(): |
| info = tarfile.TarInfo(name); info.size = len(data); info.mode = 0o644 |
| tf.addfile(info, io.BytesIO(data)) |
| entries.append({'path': name, 'bytes': len(data), 'sha256': hashlib.sha256(data).hexdigest(), 'mode': 0o644}) |
| name = 'testbed/npm/cli/node_modules/pacote' |
| info = tarfile.TarInfo(name); info.type = tarfile.SYMTYPE; info.linkname = target; info.mode = 0o777; tf.addfile(info) |
| entries.append({'path': name, 'kind': 'symlink', 'target': target, 'bytes': len(target), 'sha256': hashlib.sha256(target.encode()).hexdigest(), 'mode': 0o777}) |
| raw = archive.read_bytes() |
| manifest = root / 'context-manifest.json' |
| manifest.write_text(json.dumps({'schema_version': 3, 'archive': {'path': archive.name, 'bytes': len(raw), 'sha256': hashlib.sha256(raw).hexdigest()}, 'files': entries})) |
| return manifest |
|
|
|
|
| class ContainerLinkTests(unittest.TestCase): |
| def test_declared_paired_link_preserves_exact_git_blob(self): |
| with tempfile.TemporaryDirectory() as tmp: |
| root = Path(tmp); manifest = fixture(root) |
| materialize(manifest, root / 'out') |
| self.assertEqual(os.readlink(root / 'out/testbed/npm/cli/node_modules/pacote'), '/testbed/npm/pacote') |
| self.assertEqual((root / 'out/testbed/npm/pacote/package.json').read_bytes(), b'{}') |
|
|
| def test_undeclared_absolute_link_is_rejected(self): |
| with tempfile.TemporaryDirectory() as tmp: |
| root = Path(tmp) |
| with self.assertRaises(ValueError): materialize(fixture(root, declared=False), root / 'out') |
|
|
| def test_declaration_cannot_authorize_an_unrelated_absolute_path(self): |
| with tempfile.TemporaryDirectory() as tmp: |
| root = Path(tmp) |
| with self.assertRaises(ValueError): materialize(fixture(root, target='/etc'), root / 'out') |
|
|
| def test_wrong_git_blob_is_rejected(self): |
| with tempfile.TemporaryDirectory() as tmp: |
| root = Path(tmp) |
| with self.assertRaises(ValueError): materialize(fixture(root, wrong_blob=True), root / 'out') |
|
|
|
|
| if __name__ == '__main__': unittest.main() |
|
|
