def deserialize(self, raw_data: bytes) -> Metadata:
"""Deserialize utf-8 encoded JSON bytes into Metadata object."""
try:
json_dict = json.loads(raw_data.decode("utf-8"))
metadata_obj = Metadata.from_dict(json_dict)
except Exception as e:
raise DeserializationError("Failed to deserialize JSON") from e
return metadata_obj
def deserialize(self, raw_data: bytes) -> Metadata:
"""Deserialize utf-8 encoded JSON bytes into Metadata object."""
try:
json_dict = json.loads(raw_data.decode("utf-8"))
metadata_obj = Metadata.from_dict(json_dict)
except Exception as e: # pylint: disable=broad-except
raise DeserializationError from e
return metadata_obj
def test_metadata_base(self):
# Use of Snapshot is arbitrary, we're just testing the base class features
# with real data
snapshot_path = os.path.join(
self.repo_dir, 'metadata', 'snapshot.json')
md = Metadata.from_file(snapshot_path)
self.assertEqual(md.signed.version, 1)
md.signed.bump_version()
self.assertEqual(md.signed.version, 2)
self.assertEqual(md.signed.expires, datetime(2030, 1, 1, 0, 0))
md.signed.bump_expiration()
self.assertEqual(md.signed.expires, datetime(2030, 1, 2, 0, 0))
md.signed.bump_expiration(timedelta(days=365))
self.assertEqual(md.signed.expires, datetime(2031, 1, 2, 0, 0))
# Test is_expired with reference_time provided
is_expired = md.signed.is_expired(md.signed.expires)
self.assertTrue(is_expired)
is_expired = md.signed.is_expired(md.signed.expires + timedelta(days=1))
self.assertTrue(is_expired)
is_expired = md.signed.is_expired(md.signed.expires - timedelta(days=1))
self.assertFalse(is_expired)
# Test is_expired without reference_time,
# manipulating md.signed.expires
expires = md.signed.expires
md.signed.expires = datetime.utcnow()
is_expired = md.signed.is_expired()
self.assertTrue(is_expired)
md.signed.expires = datetime.utcnow() + timedelta(days=1)
is_expired = md.signed.is_expired()
self.assertFalse(is_expired)
md.signed.expires = expires
# Test deserializing metadata with non-unique signatures:
data = md.to_dict()
data["signatures"].append({"keyid": data["signatures"][0]["keyid"], "sig": "foo"})
with self.assertRaises(ValueError):
Metadata.from_dict(data)