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Diffstat (limited to 'tests/unittests/distros/test_init.py')
-rw-r--r-- | tests/unittests/distros/test_init.py | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/tests/unittests/distros/test_init.py b/tests/unittests/distros/test_init.py new file mode 100644 index 00000000..fd64a322 --- /dev/null +++ b/tests/unittests/distros/test_init.py @@ -0,0 +1,161 @@ +# 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 + +# In newer versions of Python, these characters will be omitted instead +# of substituted because of security concerns. +# See https://bugs.python.org/issue43882 +SECURITY_URL_CHARS = '\n\r\t' + +# 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 + SECURITY_URL_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('allow_ec2_mirror, platform_type', [ + (True, 'ec2') + ]) + @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_valid_substitution(self, + allow_ec2_mirror, + platform_type, + availability_zone, + region, + patterns, + expected): + """Test substitution works as expected.""" + flag_path = "cloudinit.distros." \ + "ALLOW_EC2_MIRRORS_ON_NON_AWS_INSTANCE_TYPES" + + m_data_source = mock.Mock( + availability_zone=availability_zone, + region=region, + platform_type=platform_type + ) + mirror_info = {'search': {'primary': patterns}} + + with mock.patch(flag_path, allow_ec2_mirror): + ret = _get_package_mirror_info( + mirror_info, + data_source=m_data_source, + mirror_filter=lambda x: x + ) + print(allow_ec2_mirror) + print(platform_type) + print(availability_zone) + print(region) + print(patterns) + print(expected) + assert {'primary': expected} == ret |