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00c0b4c69f
core-admin/qubes/tests/__init__.py
Marek Marczykowski-Górecki 00c0b4c69f
tests: cleanup tracebacks also for expectedFailure exception 
Continuation of 5bc0baea "tests: do not leak objects in object leaks
checking function".
2018-10-12 14:41:35 +02:00

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# pylint: disable=invalid-name
#
# The Qubes OS Project, https://www.qubes-os.org/
#
# Copyright (C) 2014-2015 Joanna Rutkowska <joanna@invisiblethingslab.com>
# Copyright (C) 2014-2015
# Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
# Copyright (C) 2014-2015 Wojtek Porczyk <woju@invisiblethingslab.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, see <https://www.gnu.org/licenses/>.
#
"""
.. warning::
The test suite hereby claims any domain whose name starts with
:py:data:`VMPREFIX` as fair game. This is needed to enforce sane
test executing environment. If you have domains named ``test-*``,
don't run the tests.
"""
import asyncio
import collections
import functools
import logging
import os
import pathlib
import shlex
import shutil
import subprocess
import sys
import tempfile
import time
import traceback
import unittest
import warnings
from distutils import spawn
import gc
import lxml.etree
import pkg_resources
import qubes
import qubes.api
import qubes.api.admin
import qubes.api.internal
import qubes.backup
import qubes.config
import qubes.devices
import qubes.events
import qubes.exc
import qubes.ext.pci
import qubes.vm.standalonevm
import qubes.vm.templatevm
XMLPATH = '/var/lib/qubes/qubes-test.xml'
CLASS_XMLPATH = '/var/lib/qubes/qubes-class-test.xml'
TEMPLATE = 'fedora-23'
VMPREFIX = 'test-inst-'
CLSVMPREFIX = 'test-cls-'
if 'DEFAULT_LVM_POOL' in os.environ.keys():
DEFAULT_LVM_POOL = os.environ['DEFAULT_LVM_POOL']
else:
DEFAULT_LVM_POOL = 'qubes_dom0/pool00'
POOL_CONF = {'name': 'test-lvm',
'driver': 'lvm_thin',
'volume_group': DEFAULT_LVM_POOL.split('/')[0],
'thin_pool': DEFAULT_LVM_POOL.split('/')[1]}
#: :py:obj:`True` if running in dom0, :py:obj:`False` otherwise
in_dom0 = False
#: :py:obj:`False` if outside of git repo,
#: path to root of the directory otherwise
in_git = False
try:
import libvirt
libvirt.openReadOnly(qubes.config.defaults['libvirt_uri']).close()
in_dom0 = True
except libvirt.libvirtError:
pass
if in_dom0:
import libvirtaio
libvirt_event_impl = libvirtaio.virEventRegisterAsyncIOImpl()
else:
libvirt_event_impl = None
try:
in_git = subprocess.check_output(
['git', 'rev-parse', '--show-toplevel']).decode().strip()
qubes.log.LOGPATH = '/tmp'
qubes.log.LOGFILE = '/tmp/qubes.log'
except subprocess.CalledProcessError:
# git returned nonzero, we are outside git repo
pass
except OSError:
# command not found; let's assume we're outside
pass
def skipUnlessDom0(test_item):
'''Decorator that skips test outside dom0.
Some tests (especially integration tests) have to be run in more or less
working dom0. This is checked by connecting to libvirt.
'''
return unittest.skipUnless(in_dom0, 'outside dom0')(test_item)
def skipUnlessGit(test_item):
'''Decorator that skips test outside git repo.
There are very few tests that an be run only in git. One example is
correctness of example code that won't get included in RPM.
'''
return unittest.skipUnless(in_git, 'outside git tree')(test_item)
def skipUnlessEnv(varname):
'''Decorator generator for skipping tests without environment variable set.
Some tests require working X11 display, like those using GTK library, which
segfaults without connection to X.
Other require their own, custom variables.
'''
return unittest.skipUnless(os.getenv(varname), 'no {} set'.format(varname))
class TestEmitter(qubes.events.Emitter):
'''Dummy event emitter which records events fired on it.
Events are counted in :py:attr:`fired_events` attribute, which is
:py:class:`collections.Counter` instance. For each event, ``(event, args,
kwargs)`` object is counted. *event* is event name (a string), *args* is
tuple with positional arguments and *kwargs* is sorted tuple of items from
keyword arguments.
>>> emitter = TestEmitter()
>>> emitter.fired_events
Counter()
>>> emitter.fire_event('event', spam='eggs', foo='bar')
>>> emitter.fired_events
Counter({('event', (1, 2, 3), (('foo', 'bar'), ('spam', 'eggs'))): 1})
'''
def __init__(self, *args, **kwargs):
super(TestEmitter, self).__init__(*args, **kwargs)
#: :py:class:`collections.Counter` instance
self.fired_events = collections.Counter()
def fire_event(self, event, **kwargs):
effects = super(TestEmitter, self).fire_event(event, **kwargs)
ev_kwargs = frozenset(
(key,
frozenset(value.items()) if isinstance(value, dict)
else tuple(value) if isinstance(value, list)
else value)
for key, value in kwargs.items()
)
self.fired_events[(event, ev_kwargs)] += 1
return effects
@asyncio.coroutine
def fire_event_async(self, event, pre_event=False, **kwargs):
effects = yield from super(TestEmitter, self).fire_event_async(
event, pre_event=pre_event, **kwargs)
ev_kwargs = frozenset(
(key,
frozenset(value.items()) if isinstance(value, dict) else value)
for key, value in kwargs.items()
)
self.fired_events[(event, ev_kwargs)] += 1
return effects
def expectedFailureIfTemplate(templates):
"""
Decorator for marking specific test as expected to fail only for some
templates. Template name is compared as substring, so 'whonix' will
handle both 'whonix-ws' and 'whonix-gw'.
templates can be either a single string, or an iterable
"""
def decorator(func):
@functools.wraps(func)
def wrapper(self, *args, **kwargs):
template = self.template
if isinstance(templates, str):
should_expect_fail = template in templates
else:
should_expect_fail = any([template in x for x in templates])
if should_expect_fail:
try:
func(self, *args, **kwargs)
except Exception:
raise unittest.case._ExpectedFailure(sys.exc_info())
raise unittest.case._UnexpectedSuccess()
else:
# Call directly:
func(self, *args, **kwargs)
return wrapper
return decorator
class _AssertNotRaisesContext(object):
"""A context manager used to implement TestCase.assertNotRaises methods.
Stolen from unittest and hacked. Regexp support stripped.
""" # pylint: disable=too-few-public-methods
def __init__(self, expected, test_case, expected_regexp=None):
if expected_regexp is not None:
raise NotImplementedError('expected_regexp is unsupported')
self.expected = expected
self.exception = None
self.failureException = test_case.failureException
def __enter__(self):
return self
def __exit__(self, exc_type, exc_value, tb):
if exc_type is None:
return True
if issubclass(exc_type, self.expected):
raise self.failureException(
"{!r} raised, traceback:\n{!s}".format(
exc_value, ''.join(traceback.format_tb(tb))))
else:
# pass through
return False
self.exception = exc_value # store for later retrieval
class _QrexecPolicyContext(object):
'''Context manager for SystemTestCase.qrexec_policy'''
def __init__(self, service, source, destination, allow=True, action=None):
try:
source = source.name
except AttributeError:
pass
try:
destination = destination.name
except AttributeError:
pass
self._filename = pathlib.Path('/etc/qubes-rpc/policy') / service
if action is None:
action = 'allow' if allow else 'deny'
self._rule = '{} {} {}\n'.format(source, destination, action)
self._did_create = False
self._handle = None
def load(self):
if self._handle is None:
try:
self._handle = self._filename.open('r+')
except FileNotFoundError:
self._handle = self._filename.open('w+')
self._did_create = True
self._handle.seek(0)
return self._handle.readlines()
def save(self, rules):
assert self._handle is not None
self._handle.truncate(0)
self._handle.seek(0)
self._handle.write(''.join(rules))
self._handle.flush()
def close(self):
assert self._handle is not None
self._handle.close()
self._handle = None
def __enter__(self):
rules = self.load()
rules.insert(0, self._rule)
self.save(rules)
return self
def __exit__(self, exc_type, exc_value, tb):
if not self._did_create:
try:
rules = self.load()
rules.remove(self._rule)
self.save(rules)
finally:
self.close()
else:
self.close()
self._filename.unlink()
class substitute_entry_points(object):
'''Monkey-patch pkg_resources to substitute one group in iter_entry_points
This is for testing plugins, like device classes.
:param str group: The group that is to be overloaded.
:param str tempgroup: The substitute group.
Inside this context, if one iterates over entry points in overloaded group,
the iteration actually happens over the other group.
This context manager is stackable. To substitute more than one entry point
group, just nest two contexts.
''' # pylint: disable=invalid-name
def __init__(self, group, tempgroup):
self.group = group
self.tempgroup = tempgroup
self._orig_iter_entry_points = None
def _iter_entry_points(self, group, *args, **kwargs):
if group == self.group:
group = self.tempgroup
return self._orig_iter_entry_points(group, *args, **kwargs)
def __enter__(self):
self._orig_iter_entry_points = pkg_resources.iter_entry_points
pkg_resources.iter_entry_points = self._iter_entry_points
return self
def __exit__(self, exc_type, exc_value, tb):
pkg_resources.iter_entry_points = self._orig_iter_entry_points
self._orig_iter_entry_points = None
class QubesTestCase(unittest.TestCase):
'''Base class for Qubes unit tests.
'''
def __init__(self, *args, **kwargs):
super(QubesTestCase, self).__init__(*args, **kwargs)
self.longMessage = True
self.log = logging.getLogger('{}.{}.{}'.format(
self.__class__.__module__,
self.__class__.__name__,
self._testMethodName))
self.addTypeEqualityFunc(qubes.devices.DeviceManager,
self.assertDevicesEqual)
self.loop = None
def __str__(self):
return '{}/{}/{}'.format(
self.__class__.__module__,
self.__class__.__name__,
self._testMethodName)
def setUp(self):
super().setUp()
self.addCleanup(self.cleanup_gc)
self.loop = asyncio.get_event_loop()
self.addCleanup(self.cleanup_loop)
self.addCleanup(self.cleanup_traceback)
self.addCleanup(qubes.ext.pci._cache_get.cache_clear)
def cleanup_traceback(self):
'''Remove local variables reference from tracebacks to allow garbage
collector to clean all Qubes*() objects, otherwise file descriptors
held by them will leak'''
exc_infos = [e for test_case, e in self._outcome.errors
if test_case is self]
if self._outcome.expectedFailure:
exc_infos.append(self._outcome.expectedFailure)
for exc_info in exc_infos:
if exc_info is None:
continue
ex = exc_info[1]
while ex is not None:
traceback.clear_frames(ex.__traceback__)
ex = ex.__context__
def cleanup_gc(self):
gc.collect()
leaked = [obj for obj in gc.get_objects() + gc.garbage
if isinstance(obj,
(qubes.Qubes, qubes.vm.BaseVM,
libvirt.virConnect, libvirt.virDomain))]
if leaked:
try:
import objgraph
objgraph.show_backrefs(leaked,
max_depth=15, extra_info=extra_info,
filename='/tmp/objgraph-{}.png'.format(self.id()))
except ImportError:
pass
# do not keep leaked object references in locals()
leaked = bool(leaked)
assert not leaked
def cleanup_loop(self):
'''Check if the loop is empty'''
# XXX BEWARE this is touching undocumented, implementation-specific
# attributes of the loop. This is most certainly unsupported and likely
# will break when messing with: Python version, kernel family, loop
# implementation, a combination thereof, or other things.
# KEYWORDS for searching:
# win32, SelectorEventLoop, ProactorEventLoop, uvloop, gevent
global libvirt_event_impl
# really destroy all objects that could have used loop and/or libvirt
gc.collect()
# Check for unfinished libvirt business.
if libvirt_event_impl is not None:
try:
self.loop.run_until_complete(asyncio.wait_for(
libvirt_event_impl.drain(), timeout=4))
except asyncio.TimeoutError:
raise AssertionError('libvirt event impl drain timeout')
# this is stupid, but apparently it requires two passes
# to cleanup SIGCHLD handlers
self.loop.stop()
self.loop.run_forever()
self.loop.stop()
self.loop.run_forever()
# Check there are no Tasks left.
assert not self.loop._ready
assert not self.loop._scheduled
# Check the loop watches no descriptors.
# NOTE the loop has a pipe for self-interrupting, created once per
# lifecycle, and it is unwatched only at loop.close(); so we cannot just
# check selector for non-emptiness
assert len(self.loop._selector.get_map()) \
== int(self.loop._ssock is not None)
del self.loop
def assertNotRaises(self, excClass, callableObj=None, *args, **kwargs):
"""Fail if an exception of class excClass is raised
by callableObj when invoked with arguments args and keyword
arguments kwargs. If a different type of exception is
raised, it will not be caught, and the test case will be
deemed to have suffered an error, exactly as for an
unexpected exception.
If called with callableObj omitted or None, will return a
context object used like this::
with self.assertRaises(SomeException):
do_something()
The context manager keeps a reference to the exception as
the 'exception' attribute. This allows you to inspect the
exception after the assertion::
with self.assertRaises(SomeException) as cm:
do_something()
the_exception = cm.exception
self.assertEqual(the_exception.error_code, 3)
"""
context = _AssertNotRaisesContext(excClass, self)
if callableObj is None:
return context
with context:
callableObj(*args, **kwargs)
def assertXMLEqual(self, xml1, xml2, msg=''):
'''Check for equality of two XML objects.
:param xml1: first element
:param xml2: second element
:type xml1: :py:class:`lxml.etree._Element`
:type xml2: :py:class:`lxml.etree._Element`
'''
self.assertEqual(xml1.tag, xml2.tag)
msg += '/' + str(xml1.tag)
if xml1.text is not None and xml2.text is not None:
self.assertEqual(xml1.text.strip(), xml2.text.strip(), msg)
else:
self.assertEqual(xml1.text, xml2.text, msg)
self.assertCountEqual(xml1.keys(), xml2.keys(), msg)
for key in xml1.keys():
self.assertEqual(xml1.get(key), xml2.get(key), msg)
self.assertEqual(len(xml1), len(xml2), msg + ' children count')
for child1, child2 in zip(xml1, xml2):
self.assertXMLEqual(child1, child2, msg=msg)
def assertDevicesEqual(self, devices1, devices2, msg=None):
self.assertEqual(devices1.keys(), devices2.keys(), msg)
for dev_class in devices1.keys():
self.assertEqual(
[str(dev) for dev in devices1[dev_class]],
[str(dev) for dev in devices2[dev_class]],
"Devices of class {} differs{}".format(
dev_class, (": " + msg) if msg else "")
)
def assertEventFired(self, subject, event, kwargs=None):
'''Check whether event was fired on given emitter and fail if it did
not.
:param subject: emitter which is being checked
:type emitter: :py:class:`TestEmitter`
:param str event: event identifier
:param dict kwargs: when given, all items must appear in kwargs passed \
to an event
'''
will_not_match = object()
for ev, ev_kwargs in subject.fired_events:
if ev != event:
continue
if kwargs is not None:
ev_kwargs = dict(ev_kwargs)
if any(ev_kwargs.get(k, will_not_match) != v
for k, v in kwargs.items()):
continue
return
self.fail('event {!r} {}did not fire on {!r}'.format(
event, ('' if kwargs is None else '{!r} '.format(kwargs)), subject))
def assertEventNotFired(self, subject, event, kwargs=None):
'''Check whether event was fired on given emitter. Fail if it did.
:param subject: emitter which is being checked
:type emitter: :py:class:`TestEmitter`
:param str event: event identifier
:param list kwargs: when given, all items must appear in kwargs passed \
to an event
'''
will_not_match = object()
for ev, ev_kwargs in subject.fired_events:
if ev != event:
continue
if kwargs is not None:
ev_kwargs = dict(ev_kwargs)
if any(ev_kwargs.get(k, will_not_match) != v
for k, v in kwargs.items()):
continue
self.fail('event {!r} {}did fire on {!r}'.format(
event,
('' if kwargs is None else '{!r} '.format(kwargs)),
subject))
return
def assertXMLIsValid(self, xml, file=None, schema=None):
'''Check whether given XML fulfills Relax NG schema.
Schema can be given in a couple of ways:
- As separate file. This is most common, and also the only way to
handle file inclusion. Call with file name as second argument.
- As string containing actual schema. Put that string in *schema*
keyword argument.
:param lxml.etree._Element xml: XML element instance to check
:param str file: filename of Relax NG schema
:param str schema: optional explicit schema string
''' # pylint: disable=redefined-builtin
if schema is not None and file is None:
relaxng = schema
if isinstance(relaxng, str):
relaxng = lxml.etree.XML(relaxng)
# pylint: disable=protected-access
if isinstance(relaxng, lxml.etree._Element):
relaxng = lxml.etree.RelaxNG(relaxng)
elif file is not None and schema is None:
if not os.path.isabs(file):
basedirs = ['/usr/share/doc/qubes/relaxng']
if in_git:
basedirs.insert(0, os.path.join(in_git, 'relaxng'))
for basedir in basedirs:
abspath = os.path.join(basedir, file)
if os.path.exists(abspath):
file = abspath
break
relaxng = lxml.etree.RelaxNG(file=file)
else:
raise TypeError("There should be excactly one of 'file' and "
"'schema' arguments specified.")
# We have to be extra careful here in case someone messed up with
# self.failureException. It should by default be AssertionError, just
# what is spewed by RelaxNG(), but who knows what might happen.
try:
relaxng.assert_(xml)
except self.failureException:
raise
except AssertionError as e:
self.fail(str(e))
@staticmethod
def make_vm_name(name, class_teardown=False):
if class_teardown:
return CLSVMPREFIX + name
else:
return VMPREFIX + name
class SystemTestCase(QubesTestCase):
"""
Mixin for integration tests. All the tests here should use self.app
object and when need qubes.xml path - should use :py:data:`XMLPATH`
defined in this file.
Every VM created by test, must use :py:meth:`SystemTestCase.make_vm_name`
for VM name.
By default self.app represents empty collection, if anything is needed
there from the real collection it can be imported from self.host_app in
:py:meth:`SystemTestCase.setUp`. But *can not be modified* in any way -
this include both changing attributes in
:py:attr:`SystemTestCase.host_app` and modifying files of such imported
VM. If test need to make some modification, it must clone the VM first.
If some group of tests needs class-wide initialization, first of all the
author should consider if it is really needed. But if so, setUpClass can
be used to create Qubes(CLASS_XMLPATH) object and create/import required
stuff there. VMs created in :py:meth:`TestCase.setUpClass` should
use self.make_vm_name('...', class_teardown=True) for name creation.
Such (group of) test need to take care about
:py:meth:`TestCase.tearDownClass` implementation itself.
"""
# noinspection PyAttributeOutsideInit
def setUp(self):
if not in_dom0:
self.skipTest('outside dom0')
super(SystemTestCase, self).setUp()
self.remove_test_vms()
# need some information from the real qubes.xml - at least installed
# templates; should not be used for testing, only to initialize self.app
self.host_app = qubes.Qubes(os.path.join(
qubes.config.qubes_base_dir,
qubes.config.system_path['qubes_store_filename']))
if os.path.exists(CLASS_XMLPATH):
shutil.copy(CLASS_XMLPATH, XMLPATH)
else:
shutil.copy(self.host_app.store, XMLPATH)
self.app = qubes.Qubes(XMLPATH)
os.environ['QUBES_XML_PATH'] = XMLPATH
self.app.register_event_handlers()
self.qubesd = self.loop.run_until_complete(
qubes.api.create_servers(
qubes.api.admin.QubesAdminAPI,
qubes.api.internal.QubesInternalAPI,
app=self.app, debug=True))
self.addCleanup(self.cleanup_app)
self.app.add_handler('domain-delete', self.close_qdb_on_remove)
def close_qdb_on_remove(self, app, event, vm, **kwargs):
# only close QubesDB connection, do not perform other (destructive)
# actions of vm.close()
if vm._qdb_connection_watch is not None:
asyncio.get_event_loop().remove_reader(
vm._qdb_connection_watch.watch_fd())
vm._qdb_connection_watch.close()
vm._qdb_connection_watch = None
def cleanup_app(self):
self.remove_test_vms()
server = None
for server in self.qubesd:
for sock in server.sockets:
os.unlink(sock.getsockname())
server.close()
del server
# close all existing connections, especially this will interrupt
# running admin.Events calls, which do keep reference to Qubes() and
# libvirt connection
conn = None
for conn in qubes.api.QubesDaemonProtocol.connections:
if conn.transport:
conn.transport.abort()
del conn
self.loop.run_until_complete(asyncio.wait([
server.wait_closed() for server in self.qubesd]))
del self.qubesd
# remove all references to any complex qubes objects, to release
# resources - most importantly file descriptors; this object will live
# during the whole test run, but all the file descriptors would be
# depleted earlier
self.app.close()
self.host_app.close()
del self.app
del self.host_app
for attr in dir(self):
obj_type = type(getattr(self, attr))
if obj_type.__module__.startswith('qubes'):
delattr(self, attr)
# then trigger garbage collector to really destroy those objects
gc.collect()
def init_default_template(self, template=None):
if template is None:
template = self.host_app.default_template
elif isinstance(template, str):
template = self.host_app.domains[template]
self.app.default_template = str(template)
def init_networking(self):
if not self.app.default_template:
self.skipTest('Default template required for testing networking')
default_netvm = self.host_app.default_netvm
# if testing Whonix Workstation based VMs, try to use sys-whonix instead
if self.app.default_template.name.startswith('whonix-ws'):
if 'sys-whonix' in self.host_app.domains:
default_netvm = self.host_app.domains['sys-whonix']
if default_netvm is None:
self.skipTest('Default netvm required')
if not default_netvm.is_running():
self.skipTest('VM {} required to be running'.format(
default_netvm.name))
self.app.default_netvm = str(default_netvm)
def _find_pool(self, volume_group, thin_pool):
''' Returns the pool matching the specified ``volume_group`` &
``thin_pool``, or None.
'''
pools = [p for p in self.app.pools
if issubclass(p.__class__, qubes.storage.lvm.ThinPool)]
for pool in pools:
if pool.volume_group == volume_group \
and pool.thin_pool == thin_pool:
return pool
return None
def init_lvm_pool(self):
volume_group, thin_pool = DEFAULT_LVM_POOL.split('/', 1)
path = "/dev/mapper/{!s}-{!s}".format(volume_group, thin_pool)
if not os.path.exists(path):
self.skipTest('LVM thin pool {!r} does not exist'.
format(DEFAULT_LVM_POOL))
self.pool = self._find_pool(volume_group, thin_pool)
if not self.pool:
self.pool = self.app.add_pool(**POOL_CONF)
self.created_pool = True
def _remove_vm_qubes(self, vm):
vmname = vm.name
app = vm.app
# avoid race with DispVM.auto_cleanup=True
try:
self.loop.run_until_complete(
asyncio.wait_for(vm.startup_lock.acquire(), 10))
except asyncio.TimeoutError:
pass
try:
# XXX .is_running() may throw libvirtError if undefined
if vm.is_running():
self.loop.run_until_complete(vm.kill())
except: # pylint: disable=bare-except
pass
try:
self.loop.run_until_complete(vm.remove_from_disk())
except: # pylint: disable=bare-except
pass
try:
del app.domains[vm.qid]
except KeyError:
pass
vm.close()
del vm
app.save()
del app
# Now ensure it really went away. This may not have happened,
# for example if vm.libvirt_domain malfunctioned.
try:
conn = libvirt.open(qubes.config.defaults['libvirt_uri'])
except: # pylint: disable=bare-except
pass
else:
try:
dom = conn.lookupByName(vmname)
except: # pylint: disable=bare-except
pass
else:
self._remove_vm_libvirt(dom)
conn.close()
self._remove_vm_disk(vmname)
@staticmethod
def _remove_vm_libvirt(dom):
try:
dom.destroy()
except libvirt.libvirtError: # not running
pass
dom.undefine()
@staticmethod
def _remove_vm_disk(vmname):
for dirspec in (
'qubes_appvms_dir',
'qubes_servicevms_dir',
'qubes_templates_dir'):
dirpath = os.path.join(qubes.config.qubes_base_dir,
qubes.config.system_path[dirspec], vmname)
if os.path.exists(dirpath):
if os.path.isdir(dirpath):
shutil.rmtree(dirpath)
else:
os.unlink(dirpath)
@staticmethod
def _remove_vm_disk_lvm(prefix=VMPREFIX):
''' Remove LVM volumes with given prefix
This is "a bit" drastic, as it removes volumes regardless of volume
group, thin pool etc. But we assume no important data on test system.
'''
try:
volumes = subprocess.check_output(
['lvs', '--noheadings', '-o', 'vg_name,name',
'--separator', '/']).decode()
if ('/vm-' + prefix) not in volumes:
return
subprocess.check_call(['sudo', 'lvremove', '-f'] +
[vol.strip() for vol in volumes.splitlines()
if ('/vm-' + prefix) in vol],
stdout=subprocess.DEVNULL)
except subprocess.CalledProcessError:
pass
def remove_vms(self, vms):
vms = list(vms)
if not vms:
return
# break dependencies
for vm in vms:
vm.default_dispvm = None
# then remove in reverse topological order (wrt netvm), using naive
# algorithm
# this heavily depends on lack of netvm loops
while vms:
vm = vms.pop(0)
# make sure that all connected VMs are going to be removed,
# otherwise this will loop forever
assert all(x in vms for x in vm.connected_vms)
if list(vm.connected_vms):
# if still something use this VM, put it at the end of queue
# and try next one
vms.append(vm)
continue
self._remove_vm_qubes(vm)
def remove_test_vms(self, xmlpath=XMLPATH, prefix=VMPREFIX):
'''Aggresively remove any domain that has name in testing namespace.
'''
# first, remove them Qubes-way
if os.path.exists(xmlpath):
try:
try:
app = self.app
except AttributeError:
app = qubes.Qubes(xmlpath)
try:
host_app = self.host_app
except AttributeError:
host_app = qubes.Qubes()
self.remove_vms([vm for vm in app.domains
if vm.name.startswith(prefix) or
(isinstance(vm, qubes.vm.dispvm.DispVM) and vm.name
not in host_app.domains)])
if not hasattr(self, 'host_app'):
host_app.close()
del host_app
if not hasattr(self, 'app'):
app.close()
del app
except qubes.exc.QubesException:
pass
os.unlink(xmlpath)
# now remove what was only in libvirt
conn = libvirt.open(qubes.config.defaults['libvirt_uri'])
for dom in conn.listAllDomains():
if dom.name().startswith(prefix):
self._remove_vm_libvirt(dom)
conn.close()
# finally remove anything that is left on disk
vmnames = set()
for dirspec in (
'qubes_appvms_dir',
'qubes_servicevms_dir',
'qubes_templates_dir'):
dirpath = os.path.join(qubes.config.qubes_base_dir,
qubes.config.system_path[dirspec])
if not os.path.exists(dirpath):
continue
for name in os.listdir(dirpath):
if name.startswith(prefix):
vmnames.add(name)
for vmname in vmnames:
self._remove_vm_disk(vmname)
self._remove_vm_disk_lvm(prefix)
def qrexec_policy(self, service, source, destination, allow=True,
action=None):
"""
Allow qrexec calls for duration of the test
:param service: service name
:param source: source VM name
:param destination: destination VM name
:param allow: add rule with 'allow' action, otherwise 'deny'
:param action: custom action, if specified *allow* argument is ignored
:return:
"""
return _QrexecPolicyContext(service, source, destination,
allow=allow, action=action)
def wait_for_window(self, title, timeout=30, show=True):
"""
Wait for a window with a given title. Depending on show parameter,
it will wait for either window to show or to disappear.
:param title: title of the window to wait for
:param timeout: timeout of the operation, in seconds
:param show: if True - wait for the window to be visible,
otherwise - to not be visible
:return: None
"""
wait_count = 0
while subprocess.call(['xdotool', 'search', '--name', title],
stdout=subprocess.DEVNULL, stderr=subprocess.STDOUT) \
!= int(not show):
wait_count += 1
if wait_count > timeout*10:
self.fail("Timeout while waiting for {} window to {}".format(
title, "show" if show else "hide")
)
self.loop.run_until_complete(asyncio.sleep(0.1))
def enter_keys_in_window(self, title, keys):
"""
Search for window with given title, then enter listed keys there.
The function will wait for said window to appear.
:param title: title of window
:param keys: list of keys to enter, as for `xdotool key`
:return: None
"""
# 'xdotool search --sync' sometimes crashes on some race when
# accessing window properties
self.wait_for_window(title)
command = ['xdotool', 'search', '--name', title,
'windowactivate', '--sync',
'key'] + keys
subprocess.check_call(command)
def shutdown_and_wait(self, vm, timeout=60):
self.loop.run_until_complete(vm.shutdown())
while timeout > 0:
if not vm.is_running():
return
self.loop.run_until_complete(asyncio.sleep(1))
timeout -= 1
name = vm.name
del vm
self.fail("Timeout while waiting for VM {} shutdown".format(name))
def prepare_hvm_system_linux(self, vm, init_script, extra_files=None):
if not os.path.exists('/usr/lib/grub/i386-pc'):
self.skipTest('grub2 not installed')
if not spawn.find_executable('grub2-install'):
self.skipTest('grub2-tools not installed')
if not spawn.find_executable('dracut'):
self.skipTest('dracut not installed')
# create a single partition
p = subprocess.Popen(['sfdisk', '-q', '-L', vm.storage.root_img],
stdin=subprocess.PIPE,
stdout=subprocess.DEVNULL,
stderr=subprocess.STDOUT)
p.communicate('2048,\n')
assert p.returncode == 0, 'sfdisk failed'
# TODO: check if root_img is really file, not already block device
p = subprocess.Popen(['sudo', 'losetup', '-f', '-P', '--show',
vm.storage.root_img], stdout=subprocess.PIPE)
(loopdev, _) = p.communicate()
loopdev = loopdev.strip()
looppart = loopdev + 'p1'
assert p.returncode == 0, 'losetup failed'
subprocess.check_call(['sudo', 'mkfs.ext2', '-q', '-F', looppart])
mountpoint = tempfile.mkdtemp()
subprocess.check_call(['sudo', 'mount', looppart, mountpoint])
try:
subprocess.check_call(['sudo', 'grub2-install',
'--target', 'i386-pc',
'--modules', 'part_msdos ext2',
'--boot-directory', mountpoint, loopdev],
stderr=subprocess.DEVNULL
)
grub_cfg = '{}/grub2/grub.cfg'.format(mountpoint)
subprocess.check_call(
['sudo', 'chown', '-R', os.getlogin(), mountpoint])
with open(grub_cfg, 'w') as f:
f.write(
"set timeout=1\n"
"menuentry 'Default' {\n"
" linux /vmlinuz root=/dev/xvda1 "
"rd.driver.blacklist=bochs_drm "
"rd.driver.blacklist=uhci_hcd console=hvc0\n"
" initrd /initrd\n"
"}"
)
p = subprocess.Popen(['uname', '-r'], stdout=subprocess.PIPE)
(kernel_version, _) = p.communicate()
kernel_version = kernel_version.strip()
kernel = '/boot/vmlinuz-{}'.format(kernel_version)
shutil.copy(kernel, os.path.join(mountpoint, 'vmlinuz'))
init_path = os.path.join(mountpoint, 'init')
with open(init_path, 'w') as f:
f.write(init_script)
os.chmod(init_path, 0o755)
dracut_args = [
'--kver', kernel_version,
'--include', init_path,
'/usr/lib/dracut/hooks/pre-pivot/initscript.sh',
'--no-hostonly', '--nolvmconf', '--nomdadmconf',
]
if extra_files:
dracut_args += ['--install', ' '.join(extra_files)]
subprocess.check_call(
['dracut'] + dracut_args + [os.path.join(mountpoint,
'initrd')],
stderr=subprocess.DEVNULL
)
finally:
subprocess.check_call(['sudo', 'umount', mountpoint])
shutil.rmtree(mountpoint)
subprocess.check_call(['sudo', 'losetup', '-d', loopdev])
def create_bootable_iso(self):
'''Create simple bootable ISO image.
Type 'poweroff' to it to terminate that VM.
'''
isolinux_cfg = (
'prompt 1\n'
'label poweroff\n'
' kernel poweroff.c32\n'
)
output_fd, output_path = tempfile.mkstemp('.iso')
with tempfile.TemporaryDirectory() as tmp_dir:
try:
shutil.copy('/usr/share/syslinux/isolinux.bin', tmp_dir)
shutil.copy('/usr/share/syslinux/ldlinux.c32', tmp_dir)
shutil.copy('/usr/share/syslinux/poweroff.c32', tmp_dir)
with open(os.path.join(tmp_dir, 'isolinux.cfg'), 'w') as cfg:
cfg.write(isolinux_cfg)
subprocess.check_call(['genisoimage', '-o', output_path,
'-c', 'boot.cat',
'-b', 'isolinux.bin',
'-no-emul-boot',
'-boot-load-size', '4',
'-boot-info-table',
'-q',
tmp_dir])
except FileNotFoundError:
self.skipTest('syslinux or genisoimage not installed')
os.close(output_fd)
self.addCleanup(os.unlink, output_path)
return output_path
def create_local_file(self, filename, content, mode='w'):
with open(filename, mode) as file:
file.write(content)
self.addCleanup(os.unlink, filename)
def create_remote_file(self, vm, filename, content):
self.loop.run_until_complete(vm.run_for_stdio(
'cat > {}'.format(shlex.quote(filename)),
user='root', input=content.encode('utf-8')))
@asyncio.coroutine
def wait_for_session(self, vm):
yield from asyncio.wait_for(
vm.run_service_for_stdio(
'qubes.WaitForSession', input=vm.default_user.encode()),
timeout=30)
_templates = None
def list_templates():
'''Returns tuple of template names available in the system.'''
global _templates
if _templates is None:
if 'QUBES_TEST_TEMPLATES' in os.environ:
_templates = os.environ['QUBES_TEST_TEMPLATES'].split()
if _templates is None:
try:
app = qubes.Qubes()
_templates = tuple(vm.name for vm in app.domains
if isinstance(vm, qubes.vm.templatevm.TemplateVM) and
vm.features.get('os', None) != 'Windows')
app.close()
del app
except OSError:
_templates = ()
return _templates
def create_testcases_for_templates(name, *bases, module, **kwds):
'''Do-it-all helper for generating per-template tests via load_tests proto
This does several things:
- creates per-template classes
- adds them to module's :py:func:`globals`
- returns an iterable suitable for passing to loader.loadTestsFromNames
TestCase classes created by this function have implicit `.template`
attribute, which contains name of the respective template. They are also
named with given prefix, underscore and template name. If template name
contains characters not valid as part of Python identifier, they are
impossible to get via standard ``.`` operator, though :py:func:`getattr` is
still usable.
>>> class MyTestsMixIn:
... def test_000_my_test(self):
... assert self.template.startswith('debian')
>>> def load_tests(loader, tests, pattern):
... tests.addTests(loader.loadTestsFromNames(
... qubes.tests.create_testcases_for_templates(
... 'TC_00_MyTests', MyTestsMixIn, qubes.tests.SystemTestCase,
... module=sys.modules[__name__])))
*NOTE* adding ``module=sys.modules[__name__]`` is *mandatory*, and to allow
enforcing this, it uses keyword-only argument syntax, which is only in
Python 3.
'''
# Do not attempt to grab the module from traceback, since we are actually
# a generator and loadTestsFromNames may also be a generator, so it's not
# possible to correctly guess frame from stack. Explicit is better than
# implicit!
for template in list_templates():
clsname = name + '_' + template
if hasattr(module, clsname):
continue
cls = type(clsname, bases, {'template': template, **kwds})
cls.__module__ = module.__name__
# XXX I wonder what other __dunder__ attrs did I miss
setattr(module, clsname, cls)
yield '.'.join((module.__name__, clsname))
def maybe_create_testcases_on_import(create_testcases_gen):
'''If certain conditions are met, call *create_testcases_gen* to create
testcases for templates tests. The purpose is to use it on integration
tests module(s) import, so the test runner could discover tests without
using load tests protocol.
The conditions - any of:
- QUBES_TEST_TEMPLATES present in the environment (it's possible to
create test cases without opening qubes.xml)
- QUBES_TEST_LOAD_ALL present in the environment
'''
if 'QUBES_TEST_TEMPLATES' in os.environ or \
'QUBES_TEST_LOAD_ALL' in os.environ:
list(create_testcases_gen())
def extra_info(obj):
'''Return short info identifying object.
For example, if obj is a qube, return its name. This is for use with
:py:mod:`objgraph` package.
'''
# Feel free to extend to other cases.
if isinstance(obj, qubes.vm.qubesvm.QubesVM):
try:
return obj.name
except AttributeError:
pass
if isinstance(obj, unittest.TestCase):
return obj.id()
return ''
def load_tests(loader, tests, pattern): # pylint: disable=unused-argument
# discard any tests from this module, because it hosts base classes
tests = unittest.TestSuite()
for modname in (
# unit tests
'qubes.tests.events',
'qubes.tests.devices',
'qubes.tests.devices_block',
'qubes.tests.firewall',
'qubes.tests.init',
'qubes.tests.vm.init',
'qubes.tests.storage',
'qubes.tests.storage_file',
'qubes.tests.storage_reflink',
'qubes.tests.storage_lvm',
'qubes.tests.storage_kernels',
'qubes.tests.ext',
'qubes.tests.vm.qubesvm',
'qubes.tests.vm.mix.net',
'qubes.tests.vm.adminvm',
'qubes.tests.vm.appvm',
'qubes.tests.vm.dispvm',
'qubes.tests.app',
'qubes.tests.tarwriter',
'qubes.tests.api',
'qubes.tests.api_admin',
'qubes.tests.api_misc',
'qubespolicy.tests',
'qubespolicy.tests.cli',
):
tests.addTests(loader.loadTestsFromName(modname))
# GTK/Glib is way too old there
if 'TRAVIS' not in os.environ:
for modname in (
'qubespolicy.tests.gtkhelpers',
'qubespolicy.tests.rpcconfirmation',
):
tests.addTests(loader.loadTestsFromName(modname))
tests.addTests(loader.discover(
os.path.join(os.path.dirname(__file__), 'tools')))
if not in_dom0:
return tests
for modname in (
# integration tests
'qubes.tests.integ.basic',
'qubes.tests.integ.storage',
'qubes.tests.integ.pvgrub',
'qubes.tests.integ.devices_block',
'qubes.tests.integ.devices_pci',
'qubes.tests.integ.dom0_update',
'qubes.tests.integ.network',
'qubes.tests.integ.dispvm',
'qubes.tests.integ.vm_qrexec_gui',
'qubes.tests.integ.mime',
'qubes.tests.integ.salt',
'qubes.tests.integ.backup',
'qubes.tests.integ.backupcompatibility',
# 'qubes.tests.regressions',
# external modules
'qubes.tests.extra',
):
tests.addTests(loader.loadTestsFromName(modname))
return tests
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