swift/test/unit/__init__.py

783 lines
23 KiB
Python

# Copyright (c) 2010-2012 OpenStack Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
""" Swift tests """
import os
import copy
import logging
import errno
import sys
from contextlib import contextmanager, closing
from collections import defaultdict, Iterable
from numbers import Number
from tempfile import NamedTemporaryFile
import time
from eventlet.green import socket
from tempfile import mkdtemp
from shutil import rmtree
from test import get_config
from swift.common import swob
from swift.common.utils import config_true_value, LogAdapter
from swift.common.ring import Ring, RingData
from hashlib import md5
from eventlet import sleep, Timeout
import logging.handlers
from httplib import HTTPException
from swift.common import storage_policy
import functools
import cPickle as pickle
from gzip import GzipFile
import mock as mocklib
def patch_policies(thing_or_policies=None, legacy_only=False):
if legacy_only:
default_policies = [storage_policy.StoragePolicy(
0, 'legacy', True, object_ring=FakeRing())]
else:
default_policies = [
storage_policy.StoragePolicy(
0, 'nulo', True, object_ring=FakeRing()),
storage_policy.StoragePolicy(
1, 'unu', object_ring=FakeRing()),
]
thing_or_policies = thing_or_policies or default_policies
if isinstance(thing_or_policies, (
Iterable, storage_policy.StoragePolicyCollection)):
return PatchPolicies(thing_or_policies)
else:
# it's a thing!
return PatchPolicies(default_policies)(thing_or_policies)
class PatchPolicies(object):
"""
Why not mock.patch? In my case, when used as a decorator on the class it
seemed to patch setUp at the wrong time (i.e. in setup the global wasn't
patched yet)
"""
def __init__(self, policies):
if isinstance(policies, storage_policy.StoragePolicyCollection):
self.policies = policies
else:
self.policies = storage_policy.StoragePolicyCollection(policies)
def __call__(self, thing):
if isinstance(thing, type):
return self._patch_class(thing)
else:
return self._patch_method(thing)
def _patch_class(self, cls):
class NewClass(cls):
already_patched = False
def setUp(cls_self):
self._orig_POLICIES = storage_policy._POLICIES
if not cls_self.already_patched:
storage_policy._POLICIES = self.policies
cls_self.already_patched = True
super(NewClass, cls_self).setUp()
def tearDown(cls_self):
super(NewClass, cls_self).tearDown()
storage_policy._POLICIES = self._orig_POLICIES
NewClass.__name__ = cls.__name__
return NewClass
def _patch_method(self, f):
@functools.wraps(f)
def mywrapper(*args, **kwargs):
self._orig_POLICIES = storage_policy._POLICIES
try:
storage_policy._POLICIES = self.policies
return f(*args, **kwargs)
finally:
storage_policy._POLICIES = self._orig_POLICIES
return mywrapper
def __enter__(self):
self._orig_POLICIES = storage_policy._POLICIES
storage_policy._POLICIES = self.policies
def __exit__(self, *args):
storage_policy._POLICIES = self._orig_POLICIES
class FakeRing(Ring):
def __init__(self, replicas=3, max_more_nodes=0, part_power=0,
base_port=1000):
"""
:param part_power: make part calculation based on the path
If you set a part_power when you setup your FakeRing the parts you get
out of ring methods will actually be based on the path - otherwise we
exercise the real ring code, but ignore the result and return 1.
"""
self._base_port = base_port
self.max_more_nodes = max_more_nodes
self._part_shift = 32 - part_power
# 9 total nodes (6 more past the initial 3) is the cap, no matter if
# this is set higher, or R^2 for R replicas
self.set_replicas(replicas)
self._reload()
def _reload(self):
self._rtime = time.time()
def set_replicas(self, replicas):
self.replicas = replicas
self._devs = []
for x in range(self.replicas):
ip = '10.0.0.%s' % x
port = self._base_port + x
self._devs.append({
'ip': ip,
'replication_ip': ip,
'port': port,
'replication_port': port,
'device': 'sd' + (chr(ord('a') + x)),
'zone': x % 3,
'region': x % 2,
'id': x,
})
@property
def replica_count(self):
return self.replicas
def _get_part_nodes(self, part):
return list(self._devs)
def get_more_nodes(self, part):
# replicas^2 is the true cap
for x in xrange(self.replicas, min(self.replicas + self.max_more_nodes,
self.replicas * self.replicas)):
yield {'ip': '10.0.0.%s' % x,
'port': self._base_port + x,
'device': 'sda',
'zone': x % 3,
'region': x % 2,
'id': x}
def write_fake_ring(path, *devs):
"""
Pretty much just a two node, two replica, 2 part power ring...
"""
dev1 = {'id': 0, 'zone': 0, 'device': 'sda1', 'ip': '127.0.0.1',
'port': 6000}
dev2 = {'id': 0, 'zone': 0, 'device': 'sdb1', 'ip': '127.0.0.1',
'port': 6000}
dev1_updates, dev2_updates = devs or ({}, {})
dev1.update(dev1_updates)
dev2.update(dev2_updates)
replica2part2dev_id = [[0, 1, 0, 1], [1, 0, 1, 0]]
devs = [dev1, dev2]
part_shift = 30
with closing(GzipFile(path, 'wb')) as f:
pickle.dump(RingData(replica2part2dev_id, devs, part_shift), f)
class FakeMemcache(object):
def __init__(self):
self.store = {}
def get(self, key):
return self.store.get(key)
def keys(self):
return self.store.keys()
def set(self, key, value, time=0):
self.store[key] = value
return True
def incr(self, key, time=0):
self.store[key] = self.store.setdefault(key, 0) + 1
return self.store[key]
@contextmanager
def soft_lock(self, key, timeout=0, retries=5):
yield True
def delete(self, key):
try:
del self.store[key]
except Exception:
pass
return True
def readuntil2crlfs(fd):
rv = ''
lc = ''
crlfs = 0
while crlfs < 2:
c = fd.read(1)
if not c:
raise ValueError("didn't get two CRLFs; just got %r" % rv)
rv = rv + c
if c == '\r' and lc != '\n':
crlfs = 0
if lc == '\r' and c == '\n':
crlfs += 1
lc = c
return rv
def connect_tcp(hostport):
rv = socket.socket()
rv.connect(hostport)
return rv
@contextmanager
def tmpfile(content):
with NamedTemporaryFile('w', delete=False) as f:
file_name = f.name
f.write(str(content))
try:
yield file_name
finally:
os.unlink(file_name)
xattr_data = {}
def _get_inode(fd):
if not isinstance(fd, int):
try:
fd = fd.fileno()
except AttributeError:
return os.stat(fd).st_ino
return os.fstat(fd).st_ino
def _setxattr(fd, k, v):
inode = _get_inode(fd)
data = xattr_data.get(inode, {})
data[k] = v
xattr_data[inode] = data
def _getxattr(fd, k):
inode = _get_inode(fd)
data = xattr_data.get(inode, {}).get(k)
if not data:
raise IOError(errno.ENODATA, "Fake IOError")
return data
import xattr
xattr.setxattr = _setxattr
xattr.getxattr = _getxattr
@contextmanager
def temptree(files, contents=''):
# generate enough contents to fill the files
c = len(files)
contents = (list(contents) + [''] * c)[:c]
tempdir = mkdtemp()
for path, content in zip(files, contents):
if os.path.isabs(path):
path = '.' + path
new_path = os.path.join(tempdir, path)
subdir = os.path.dirname(new_path)
if not os.path.exists(subdir):
os.makedirs(subdir)
with open(new_path, 'w') as f:
f.write(str(content))
try:
yield tempdir
finally:
rmtree(tempdir)
def with_tempdir(f):
"""
Decorator to give a single test a tempdir as argument to test method.
"""
@functools.wraps(f)
def wrapped(*args, **kwargs):
tempdir = mkdtemp()
args = list(args)
args.append(tempdir)
try:
return f(*args, **kwargs)
finally:
rmtree(tempdir)
return wrapped
class NullLoggingHandler(logging.Handler):
def emit(self, record):
pass
class UnmockTimeModule(object):
"""
Even if a test mocks time.time - you can restore unmolested behavior in a
another module who imports time directly by monkey patching it's imported
reference to the module with an instance of this class
"""
_orig_time = time.time
def __getattribute__(self, name):
if name == 'time':
return UnmockTimeModule._orig_time
return getattr(time, name)
# logging.LogRecord.__init__ calls time.time
logging.time = UnmockTimeModule()
class FakeLogger(logging.Logger):
# a thread safe logger
def __init__(self, *args, **kwargs):
self._clear()
self.name = 'swift.unit.fake_logger'
self.level = logging.NOTSET
if 'facility' in kwargs:
self.facility = kwargs['facility']
self.statsd_client = None
self.thread_locals = None
self.parent = None
def _clear(self):
self.log_dict = defaultdict(list)
self.lines_dict = {'critical': [], 'error': [], 'info': [],
'warning': [], 'debug': []}
def _store_in(store_name):
def stub_fn(self, *args, **kwargs):
self.log_dict[store_name].append((args, kwargs))
return stub_fn
def _store_and_log_in(store_name, level):
def stub_fn(self, *args, **kwargs):
self.log_dict[store_name].append((args, kwargs))
self._log(level, args[0], args[1:], **kwargs)
return stub_fn
def get_lines_for_level(self, level):
if level not in self.lines_dict:
raise KeyError(
"Invalid log level '%s'; valid levels are %s" %
(level,
', '.join("'%s'" % lvl for lvl in sorted(self.lines_dict))))
return self.lines_dict[level]
def all_log_lines(self):
return dict((level, msgs) for level, msgs in self.lines_dict.items()
if len(msgs) > 0)
error = _store_and_log_in('error', logging.ERROR)
info = _store_and_log_in('info', logging.INFO)
warning = _store_and_log_in('warning', logging.WARNING)
warn = _store_and_log_in('warning', logging.WARNING)
debug = _store_and_log_in('debug', logging.DEBUG)
def exception(self, *args, **kwargs):
self.log_dict['exception'].append((args, kwargs,
str(sys.exc_info()[1])))
print 'FakeLogger Exception: %s' % self.log_dict
# mock out the StatsD logging methods:
update_stats = _store_in('update_stats')
increment = _store_in('increment')
decrement = _store_in('decrement')
timing = _store_in('timing')
timing_since = _store_in('timing_since')
transfer_rate = _store_in('transfer_rate')
set_statsd_prefix = _store_in('set_statsd_prefix')
def get_increments(self):
return [call[0][0] for call in self.log_dict['increment']]
def get_increment_counts(self):
counts = {}
for metric in self.get_increments():
if metric not in counts:
counts[metric] = 0
counts[metric] += 1
return counts
def setFormatter(self, obj):
self.formatter = obj
def close(self):
self._clear()
def set_name(self, name):
# don't touch _handlers
self._name = name
def acquire(self):
pass
def release(self):
pass
def createLock(self):
pass
def emit(self, record):
pass
def _handle(self, record):
try:
line = record.getMessage()
except TypeError:
print 'WARNING: unable to format log message %r %% %r' % (
record.msg, record.args)
raise
self.lines_dict[record.levelname.lower()].append(line)
def handle(self, record):
self._handle(record)
def flush(self):
pass
def handleError(self, record):
pass
class DebugLogger(FakeLogger):
"""A simple stdout logging version of FakeLogger"""
def __init__(self, *args, **kwargs):
FakeLogger.__init__(self, *args, **kwargs)
self.formatter = logging.Formatter(
"%(server)s %(levelname)s: %(message)s")
def handle(self, record):
self._handle(record)
print self.formatter.format(record)
class DebugLogAdapter(LogAdapter):
def _send_to_logger(name):
def stub_fn(self, *args, **kwargs):
return getattr(self.logger, name)(*args, **kwargs)
return stub_fn
# delegate to FakeLogger's mocks
update_stats = _send_to_logger('update_stats')
increment = _send_to_logger('increment')
decrement = _send_to_logger('decrement')
timing = _send_to_logger('timing')
timing_since = _send_to_logger('timing_since')
transfer_rate = _send_to_logger('transfer_rate')
set_statsd_prefix = _send_to_logger('set_statsd_prefix')
def __getattribute__(self, name):
try:
return object.__getattribute__(self, name)
except AttributeError:
return getattr(self.__dict__['logger'], name)
def debug_logger(name='test'):
"""get a named adapted debug logger"""
return DebugLogAdapter(DebugLogger(), name)
original_syslog_handler = logging.handlers.SysLogHandler
def fake_syslog_handler():
for attr in dir(original_syslog_handler):
if attr.startswith('LOG'):
setattr(FakeLogger, attr,
copy.copy(getattr(logging.handlers.SysLogHandler, attr)))
FakeLogger.priority_map = \
copy.deepcopy(logging.handlers.SysLogHandler.priority_map)
logging.handlers.SysLogHandler = FakeLogger
if config_true_value(get_config('unit_test').get('fake_syslog', 'False')):
fake_syslog_handler()
class MockTrue(object):
"""
Instances of MockTrue evaluate like True
Any attr accessed on an instance of MockTrue will return a MockTrue
instance. Any method called on an instance of MockTrue will return
a MockTrue instance.
>>> thing = MockTrue()
>>> thing
True
>>> thing == True # True == True
True
>>> thing == False # True == False
False
>>> thing != True # True != True
False
>>> thing != False # True != False
True
>>> thing.attribute
True
>>> thing.method()
True
>>> thing.attribute.method()
True
>>> thing.method().attribute
True
"""
def __getattribute__(self, *args, **kwargs):
return self
def __call__(self, *args, **kwargs):
return self
def __repr__(*args, **kwargs):
return repr(True)
def __eq__(self, other):
return other is True
def __ne__(self, other):
return other is not True
@contextmanager
def mock(update):
returns = []
deletes = []
for key, value in update.items():
imports = key.split('.')
attr = imports.pop(-1)
module = __import__(imports[0], fromlist=imports[1:])
for modname in imports[1:]:
module = getattr(module, modname)
if hasattr(module, attr):
returns.append((module, attr, getattr(module, attr)))
else:
deletes.append((module, attr))
setattr(module, attr, value)
try:
yield True
finally:
for module, attr, value in returns:
setattr(module, attr, value)
for module, attr in deletes:
delattr(module, attr)
def fake_http_connect(*code_iter, **kwargs):
class FakeConn(object):
def __init__(self, status, etag=None, body='', timestamp='1',
headers=None):
# connect exception
if isinstance(status, (Exception, Timeout)):
raise status
if isinstance(status, tuple):
self.expect_status, self.status = status
else:
self.expect_status, self.status = (None, status)
if not self.expect_status:
# when a swift backend service returns a status before reading
# from the body (mostly an error response) eventlet.wsgi will
# respond with that status line immediately instead of 100
# Continue, even if the client sent the Expect 100 header.
# BufferedHttp and the proxy both see these error statuses
# when they call getexpect, so our FakeConn tries to act like
# our backend services and return certain types of responses
# as expect statuses just like a real backend server would do.
if self.status in (507, 412, 409):
self.expect_status = status
else:
self.expect_status = 100
self.reason = 'Fake'
self.host = '1.2.3.4'
self.port = '1234'
self.sent = 0
self.received = 0
self.etag = etag
self.body = body
self.headers = headers or {}
self.timestamp = timestamp
if 'slow' in kwargs and isinstance(kwargs['slow'], list):
try:
self._next_sleep = kwargs['slow'].pop(0)
except IndexError:
self._next_sleep = None
def getresponse(self):
if isinstance(self.status, (Exception, Timeout)):
raise self.status
exc = kwargs.get('raise_exc')
if exc:
if isinstance(exc, (Exception, Timeout)):
raise exc
raise Exception('test')
if kwargs.get('raise_timeout_exc'):
raise Timeout()
return self
def getexpect(self):
if isinstance(self.expect_status, (Exception, Timeout)):
raise self.expect_status
headers = {}
if self.expect_status == 409:
headers['X-Backend-Timestamp'] = self.timestamp
return FakeConn(self.expect_status, headers=headers)
def getheaders(self):
etag = self.etag
if not etag:
if isinstance(self.body, str):
etag = '"' + md5(self.body).hexdigest() + '"'
else:
etag = '"68b329da9893e34099c7d8ad5cb9c940"'
headers = swob.HeaderKeyDict({
'content-length': len(self.body),
'content-type': 'x-application/test',
'x-timestamp': self.timestamp,
'x-backend-timestamp': self.timestamp,
'last-modified': self.timestamp,
'x-object-meta-test': 'testing',
'x-delete-at': '9876543210',
'etag': etag,
'x-works': 'yes',
})
if self.status // 100 == 2:
headers['x-account-container-count'] = \
kwargs.get('count', 12345)
if not self.timestamp:
# when timestamp is None, HeaderKeyDict raises KeyError
headers.pop('x-timestamp', None)
try:
if container_ts_iter.next() is False:
headers['x-container-timestamp'] = '1'
except StopIteration:
pass
am_slow, value = self.get_slow()
if am_slow:
headers['content-length'] = '4'
headers.update(self.headers)
return headers.items()
def get_slow(self):
if 'slow' in kwargs and isinstance(kwargs['slow'], list):
if self._next_sleep is not None:
return True, self._next_sleep
else:
return False, 0.01
if kwargs.get('slow') and isinstance(kwargs['slow'], Number):
return True, kwargs['slow']
return bool(kwargs.get('slow')), 0.1
def read(self, amt=None):
am_slow, value = self.get_slow()
if am_slow:
if self.sent < 4:
self.sent += 1
sleep(value)
return ' '
rv = self.body[:amt]
self.body = self.body[amt:]
return rv
def send(self, amt=None):
am_slow, value = self.get_slow()
if am_slow:
if self.received < 4:
self.received += 1
sleep(value)
def getheader(self, name, default=None):
return swob.HeaderKeyDict(self.getheaders()).get(name, default)
timestamps_iter = iter(kwargs.get('timestamps') or ['1'] * len(code_iter))
etag_iter = iter(kwargs.get('etags') or [None] * len(code_iter))
if isinstance(kwargs.get('headers'), list):
headers_iter = iter(kwargs['headers'])
else:
headers_iter = iter([kwargs.get('headers', {})] * len(code_iter))
x = kwargs.get('missing_container', [False] * len(code_iter))
if not isinstance(x, (tuple, list)):
x = [x] * len(code_iter)
container_ts_iter = iter(x)
code_iter = iter(code_iter)
static_body = kwargs.get('body', None)
body_iter = kwargs.get('body_iter', None)
if body_iter:
body_iter = iter(body_iter)
def connect(*args, **ckwargs):
if kwargs.get('slow_connect', False):
sleep(0.1)
if 'give_content_type' in kwargs:
if len(args) >= 7 and 'Content-Type' in args[6]:
kwargs['give_content_type'](args[6]['Content-Type'])
else:
kwargs['give_content_type']('')
if 'give_connect' in kwargs:
kwargs['give_connect'](*args, **ckwargs)
status = code_iter.next()
etag = etag_iter.next()
headers = headers_iter.next()
timestamp = timestamps_iter.next()
if status <= 0:
raise HTTPException()
if body_iter is None:
body = static_body or ''
else:
body = body_iter.next()
return FakeConn(status, etag, body=body, timestamp=timestamp,
headers=headers)
connect.code_iter = code_iter
return connect
@contextmanager
def mocked_http_conn(*args, **kwargs):
fake_conn = fake_http_connect(*args, **kwargs)
with mocklib.patch('swift.common.bufferedhttp.http_connect_raw',
new=fake_conn):
yield fake_conn