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# Copyright (C) 2020 Canonical Ltd.
#
# This file is part of cloud-init. See LICENSE file for license information.
"""Upgrade testing for cloud-init.
This module tests cloud-init's behaviour across upgrades. Specifically, it
specifies a set of invariants that the current codebase expects to be true (as
tests in ``TestUpgrade``) and then checks that these hold true after unpickling
``obj.pkl``s from previous versions of cloud-init; those pickles are stored in
``tests/data/old_pickles/``.
"""
import operator
import pathlib
import pytest
from cloudinit.sources import pkl_load
from cloudinit.sources.DataSourceAzure import DataSourceAzure
from cloudinit.sources.DataSourceNoCloud import DataSourceNoCloud
from tests.unittests.helpers import resourceLocation
DSNAME_TO_CLASS = {
"Azure": DataSourceAzure,
"NoCloud": DataSourceNoCloud,
}
class TestUpgrade:
@pytest.fixture(
params=pathlib.Path(resourceLocation("old_pickles")).glob("*.pkl"),
scope="class",
ids=operator.attrgetter("name"),
)
def previous_obj_pkl(self, request):
"""Load each pickle to memory once, then run all tests against it.
Test implementations _must not_ modify the ``previous_obj_pkl`` which
they are passed, as that will affect tests that run after them.
"""
return pkl_load(str(request.param))
def test_pkl_load_defines_all_init_side_effect_attributes(
self, previous_obj_pkl
):
"""Any attrs as side-effects of __init__ exist in unpickled obj."""
ds_class = DSNAME_TO_CLASS[previous_obj_pkl.dsname]
sys_cfg = previous_obj_pkl.sys_cfg
distro = previous_obj_pkl.distro
paths = previous_obj_pkl.paths
ds = ds_class(sys_cfg, distro, paths)
if ds.dsname == "NoCloud" and previous_obj_pkl.__dict__:
expected = (
set({"seed_dirs"}), # LP: #1568150 handled with getattr checks
set(),
)
else:
expected = (set(),)
missing_attrs = ds.__dict__.keys() - previous_obj_pkl.__dict__.keys()
assert missing_attrs in expected
def test_networking_set_on_distro(self, previous_obj_pkl):
"""We always expect to have ``.networking`` on ``Distro`` objects."""
assert previous_obj_pkl.distro.networking is not None
def test_blacklist_drivers_set_on_networking(self, previous_obj_pkl):
"""We always expect Networking.blacklist_drivers to be initialised."""
assert previous_obj_pkl.distro.networking.blacklist_drivers is None
def test_paths_has_run_dir_attribute(self, previous_obj_pkl):
assert previous_obj_pkl.paths.run_dir is not None
def test_vendordata_exists(self, previous_obj_pkl):
assert previous_obj_pkl.vendordata2 is None
assert previous_obj_pkl.vendordata2_raw is None
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