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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.
"""Tests for cloudinit/distros/__init__.py"""
from unittest import mock
import pytest
from cloudinit.distros import _get_package_mirror_info, LDH_ASCII_CHARS
# Define a set of characters we would expect to be replaced
INVALID_URL_CHARS = [
chr(x) for x in range(127) if chr(x) not in LDH_ASCII_CHARS
]
for separator in [":", ".", "/", "#", "?", "@", "[", "]"]:
# Remove from the set characters that either separate hostname parts (":",
# "."), terminate hostnames ("/", "#", "?", "@"), or cause Python to be
# unable to parse URLs ("[", "]").
INVALID_URL_CHARS.remove(separator)
class TestGetPackageMirrorInfo:
"""
Tests for cloudinit.distros._get_package_mirror_info.
These supplement the tests in tests/unittests/test_distros/test_generic.py
which are more focused on testing a single production-like configuration.
These tests are more focused on specific aspects of the unit under test.
"""
@pytest.mark.parametrize('mirror_info,expected', [
# Empty info gives empty return
({}, {}),
# failsafe values used if present
({'failsafe': {'primary': 'http://value', 'security': 'http://other'}},
{'primary': 'http://value', 'security': 'http://other'}),
# search values used if present
({'search': {'primary': ['http://value'],
'security': ['http://other']}},
{'primary': ['http://value'], 'security': ['http://other']}),
# failsafe values used if search value not present
({'search': {'primary': ['http://value']},
'failsafe': {'security': 'http://other'}},
{'primary': ['http://value'], 'security': 'http://other'})
])
def test_get_package_mirror_info_failsafe(self, mirror_info, expected):
"""
Test the interaction between search and failsafe inputs
(This doesn't test the case where the mirror_filter removes all search
options; test_failsafe_used_if_all_search_results_filtered_out covers
that.)
"""
assert expected == _get_package_mirror_info(mirror_info,
mirror_filter=lambda x: x)
def test_failsafe_used_if_all_search_results_filtered_out(self):
"""Test the failsafe option used if all search options eliminated."""
mirror_info = {
'search': {'primary': ['http://value']},
'failsafe': {'primary': 'http://other'}
}
assert {'primary': 'http://other'} == _get_package_mirror_info(
mirror_info, mirror_filter=lambda x: False)
@pytest.mark.parametrize('availability_zone,region,patterns,expected', (
# Test ec2_region alone
('fk-fake-1f', None, ['http://EC2-%(ec2_region)s/ubuntu'],
['http://ec2-fk-fake-1/ubuntu']),
# Test availability_zone alone
('fk-fake-1f', None, ['http://AZ-%(availability_zone)s/ubuntu'],
['http://az-fk-fake-1f/ubuntu']),
# Test region alone
(None, 'fk-fake-1', ['http://RG-%(region)s/ubuntu'],
['http://rg-fk-fake-1/ubuntu']),
# Test that ec2_region is not available for non-matching AZs
('fake-fake-1f', None,
['http://EC2-%(ec2_region)s/ubuntu',
'http://AZ-%(availability_zone)s/ubuntu'],
['http://az-fake-fake-1f/ubuntu']),
# Test that template order maintained
(None, 'fake-region',
['http://RG-%(region)s-2/ubuntu', 'http://RG-%(region)s-1/ubuntu'],
['http://rg-fake-region-2/ubuntu', 'http://rg-fake-region-1/ubuntu']),
# Test that non-ASCII hostnames are IDNA encoded;
# "IDNA-ТεЅТ̣".encode('idna') == b"xn--idna--4kd53hh6aba3q"
(None, 'ТεЅТ̣', ['http://www.IDNA-%(region)s.com/ubuntu'],
['http://www.xn--idna--4kd53hh6aba3q.com/ubuntu']),
# Test that non-ASCII hostnames with a port are IDNA encoded;
# "IDNA-ТεЅТ̣".encode('idna') == b"xn--idna--4kd53hh6aba3q"
(None, 'ТεЅТ̣', ['http://www.IDNA-%(region)s.com:8080/ubuntu'],
['http://www.xn--idna--4kd53hh6aba3q.com:8080/ubuntu']),
# Test that non-ASCII non-hostname parts of URLs are unchanged
(None, 'ТεЅТ̣', ['http://www.example.com/%(region)s/ubuntu'],
['http://www.example.com/ТεЅТ̣/ubuntu']),
# Test that IPv4 addresses are unchanged
(None, 'fk-fake-1', ['http://192.168.1.1:8080/%(region)s/ubuntu'],
['http://192.168.1.1:8080/fk-fake-1/ubuntu']),
# Test that IPv6 addresses are unchanged
(None, 'fk-fake-1',
['http://[2001:67c:1360:8001::23]/%(region)s/ubuntu'],
['http://[2001:67c:1360:8001::23]/fk-fake-1/ubuntu']),
# Test that unparseable URLs are filtered out of the mirror list
(None, 'inv[lid',
['http://%(region)s.in.hostname/should/be/filtered',
'http://but.not.in.the.path/%(region)s'],
['http://but.not.in.the.path/inv[lid']),
(None, '-some-region-',
['http://-lead-ing.%(region)s.trail-ing-.example.com/ubuntu'],
['http://lead-ing.some-region.trail-ing.example.com/ubuntu']),
) + tuple(
# Dynamically generate a test case for each non-LDH
# (Letters/Digits/Hyphen) ASCII character, testing that it is
# substituted with a hyphen
(None, 'fk{0}fake{0}1'.format(invalid_char),
['http://%(region)s/ubuntu'], ['http://fk-fake-1/ubuntu'])
for invalid_char in INVALID_URL_CHARS
))
def test_substitution(self, availability_zone, region, patterns, expected):
"""Test substitution works as expected."""
m_data_source = mock.Mock(
availability_zone=availability_zone, region=region
)
mirror_info = {'search': {'primary': patterns}}
ret = _get_package_mirror_info(
mirror_info,
data_source=m_data_source,
mirror_filter=lambda x: x
)
assert {'primary': expected} == ret
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