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# Copyright (C) 2020 Canonical Ltd.
#
# Author: Daniel Watkins <oddbloke@ubuntu.com>
#
# 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.stages import _pkl_load
from tests.unittests.helpers import resourceLocation
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_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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