a886922157
Transient errors inside transaction unpins the session. Add brief docs about sharded transactions and add 3.9 changelog. Tests changes: Add spec tests for sharded transaction recoveryToken. Speed up txn tests by reducing SDAM waiting time after a network error. Remove outdated test workaround for killAllSessions.
638 lines
19 KiB
Python
638 lines
19 KiB
Python
# Copyright 2012-present MongoDB, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Utilities for testing pymongo
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"""
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import collections
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import contextlib
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import functools
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import os
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import re
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import sys
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import threading
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import time
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import warnings
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from collections import defaultdict
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from functools import partial
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from bson import json_util, py3compat
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from bson.objectid import ObjectId
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from pymongo import MongoClient, monitoring
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from pymongo.errors import OperationFailure
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from pymongo.monitoring import _SENSITIVE_COMMANDS
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from pymongo.read_concern import ReadConcern
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from pymongo.server_selectors import (any_server_selector,
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writable_server_selector)
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from pymongo.write_concern import WriteConcern
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from test import client_context, db_user, db_pwd
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IMPOSSIBLE_WRITE_CONCERN = WriteConcern(w=1000)
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class WhiteListEventListener(monitoring.CommandListener):
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def __init__(self, *commands):
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self.commands = set(commands)
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self.results = defaultdict(list)
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def started(self, event):
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if event.command_name in self.commands:
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self.results['started'].append(event)
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def succeeded(self, event):
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if event.command_name in self.commands:
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self.results['succeeded'].append(event)
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def failed(self, event):
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if event.command_name in self.commands:
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self.results['failed'].append(event)
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class EventListener(monitoring.CommandListener):
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def __init__(self):
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self.results = defaultdict(list)
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def started(self, event):
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self.results['started'].append(event)
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def succeeded(self, event):
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self.results['succeeded'].append(event)
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def failed(self, event):
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self.results['failed'].append(event)
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class OvertCommandListener(EventListener):
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"""A CommandListener that ignores sensitive commands."""
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def started(self, event):
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if event.command_name.lower() not in _SENSITIVE_COMMANDS:
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super(OvertCommandListener, self).started(event)
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def succeeded(self, event):
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if event.command_name.lower() not in _SENSITIVE_COMMANDS:
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super(OvertCommandListener, self).succeeded(event)
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def failed(self, event):
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if event.command_name.lower() not in _SENSITIVE_COMMANDS:
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super(OvertCommandListener, self).failed(event)
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class ServerAndTopologyEventListener(monitoring.ServerListener,
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monitoring.TopologyListener):
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"""Listens to all events."""
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def __init__(self):
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self.results = []
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def opened(self, event):
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self.results.append(event)
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def description_changed(self, event):
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self.results.append(event)
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def closed(self, event):
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self.results.append(event)
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class HeartbeatEventListener(monitoring.ServerHeartbeatListener):
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"""Listens to only server heartbeat events."""
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def __init__(self):
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self.results = []
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def started(self, event):
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self.results.append(event)
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def succeeded(self, event):
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self.results.append(event)
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def failed(self, event):
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self.results.append(event)
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class ScenarioDict(dict):
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"""Dict that returns {} for any unknown key, recursively."""
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def __init__(self, data):
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def convert(v):
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if isinstance(v, collections.Mapping):
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return ScenarioDict(v)
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if isinstance(v, py3compat.string_type):
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return v
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if isinstance(v, collections.Sequence):
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return [convert(item) for item in v]
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return v
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dict.__init__(self, [(k, convert(v)) for k, v in data.items()])
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def __getitem__(self, item):
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try:
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return dict.__getitem__(self, item)
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except KeyError:
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# Unlike a defaultdict, don't set the key, just return a dict.
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return ScenarioDict({})
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class CompareType(object):
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"""Class that compares equal to any object of the given type."""
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def __init__(self, type):
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self.type = type
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def __eq__(self, other):
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return isinstance(other, self.type)
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def __ne__(self, other):
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"""Needed for Python 2."""
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return not self.__eq__(other)
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class TestCreator(object):
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"""Class to create test cases from specifications."""
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def __init__(self, create_test, test_class, test_path):
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"""Create a TestCreator object.
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:Parameters:
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- `create_test`: callback that returns a test case. The callback
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must accept the following arguments - a dictionary containing the
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entire test specification (the `scenario_def`), a dictionary
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containing the specification for which the test case will be
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generated (the `test_def`).
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- `test_class`: the unittest.TestCase class in which to create the
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test case.
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- `test_path`: path to the directory containing the JSON files with
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the test specifications.
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"""
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self._create_test = create_test
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self._test_class= test_class
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self.test_path = test_path
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def _ensure_min_max_server_version(self, scenario_def, method):
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"""Test modifier that enforces a version range for the server on a
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test case."""
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if 'minServerVersion' in scenario_def:
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min_ver = tuple(
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int(elt) for
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elt in scenario_def['minServerVersion'].split('.'))
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if min_ver is not None:
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method = client_context.require_version_min(*min_ver)(method)
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if 'maxServerVersion' in scenario_def:
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max_ver = tuple(
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int(elt) for
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elt in scenario_def['maxServerVersion'].split('.'))
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if max_ver is not None:
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method = client_context.require_version_max(*max_ver)(method)
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return method
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def create_tests(self):
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for dirpath, _, filenames in os.walk(self.test_path):
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dirname = os.path.split(dirpath)[-1]
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for filename in filenames:
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with open(os.path.join(dirpath, filename)) as scenario_stream:
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scenario_def = ScenarioDict(
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json_util.loads(scenario_stream.read()))
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test_type = os.path.splitext(filename)[0]
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# Construct test from scenario.
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for test_def in scenario_def['tests']:
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test_name = 'test_%s_%s_%s' % (
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dirname, test_type,
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str(test_def['description'].replace(" ", "_")))
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new_test = self._create_test(
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scenario_def, test_def, test_name)
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new_test = self._ensure_min_max_server_version(
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scenario_def, new_test)
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new_test.__name__ = test_name
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setattr(self._test_class, new_test.__name__, new_test)
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def _connection_string(h, authenticate):
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if h.startswith("mongodb://"):
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return h
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elif client_context.auth_enabled and authenticate:
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return "mongodb://%s:%s@%s" % (db_user, db_pwd, str(h))
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else:
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return "mongodb://%s" % (str(h),)
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def _mongo_client(host, port, authenticate=True, direct=False, **kwargs):
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"""Create a new client over SSL/TLS if necessary."""
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host = host or client_context.host
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port = port or client_context.port
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client_options = client_context.default_client_options.copy()
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if client_context.replica_set_name and not direct:
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client_options['replicaSet'] = client_context.replica_set_name
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client_options.update(kwargs)
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client = MongoClient(_connection_string(host, authenticate), port,
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**client_options)
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return client
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def single_client_noauth(h=None, p=None, **kwargs):
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"""Make a direct connection. Don't authenticate."""
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return _mongo_client(h, p, authenticate=False, direct=True, **kwargs)
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def single_client(h=None, p=None, **kwargs):
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"""Make a direct connection, and authenticate if necessary."""
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return _mongo_client(h, p, direct=True, **kwargs)
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def rs_client_noauth(h=None, p=None, **kwargs):
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"""Connect to the replica set. Don't authenticate."""
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return _mongo_client(h, p, authenticate=False, **kwargs)
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def rs_client(h=None, p=None, **kwargs):
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"""Connect to the replica set and authenticate if necessary."""
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return _mongo_client(h, p, **kwargs)
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def rs_or_single_client_noauth(h=None, p=None, **kwargs):
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"""Connect to the replica set if there is one, otherwise the standalone.
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Like rs_or_single_client, but does not authenticate.
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"""
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return _mongo_client(h, p, authenticate=False, **kwargs)
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def rs_or_single_client(h=None, p=None, **kwargs):
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"""Connect to the replica set if there is one, otherwise the standalone.
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Authenticates if necessary.
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"""
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return _mongo_client(h, p, **kwargs)
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def one(s):
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"""Get one element of a set"""
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return next(iter(s))
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def oid_generated_on_process(oid):
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"""Makes a determination as to whether the given ObjectId was generated
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by the current process, based on the 5-byte random number in the ObjectId.
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"""
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return ObjectId._random() == oid.binary[4:9]
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def delay(sec):
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return '''function() { sleep(%f * 1000); return true; }''' % sec
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def get_command_line(client):
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command_line = client.admin.command('getCmdLineOpts')
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assert command_line['ok'] == 1, "getCmdLineOpts() failed"
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return command_line
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def camel_to_snake(camel):
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# Regex to convert CamelCase to snake_case.
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snake = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', camel)
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return re.sub('([a-z0-9])([A-Z])', r'\1_\2', snake).lower()
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def camel_to_upper_camel(camel):
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return camel[0].upper() + camel[1:]
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def camel_to_snake_args(arguments):
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for arg_name in list(arguments):
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c2s = camel_to_snake(arg_name)
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arguments[c2s] = arguments.pop(arg_name)
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return arguments
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def parse_collection_options(opts):
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if 'readPreference' in opts:
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opts['read_preference'] = parse_read_preference(
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opts.pop('readPreference'))
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if 'writeConcern' in opts:
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opts['write_concern'] = WriteConcern(
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**dict(opts.pop('writeConcern')))
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if 'readConcern' in opts:
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opts['read_concern'] = ReadConcern(
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**dict(opts.pop('readConcern')))
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return opts
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def server_started_with_option(client, cmdline_opt, config_opt):
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"""Check if the server was started with a particular option.
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:Parameters:
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- `cmdline_opt`: The command line option (i.e. --nojournal)
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- `config_opt`: The config file option (i.e. nojournal)
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"""
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command_line = get_command_line(client)
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if 'parsed' in command_line:
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parsed = command_line['parsed']
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if config_opt in parsed:
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return parsed[config_opt]
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argv = command_line['argv']
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return cmdline_opt in argv
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def server_started_with_auth(client):
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try:
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command_line = get_command_line(client)
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except OperationFailure as e:
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msg = e.details.get('errmsg', '')
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if e.code == 13 or 'unauthorized' in msg or 'login' in msg:
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# Unauthorized.
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return True
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raise
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# MongoDB >= 2.0
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if 'parsed' in command_line:
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parsed = command_line['parsed']
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# MongoDB >= 2.6
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if 'security' in parsed:
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security = parsed['security']
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# >= rc3
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if 'authorization' in security:
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return security['authorization'] == 'enabled'
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# < rc3
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return security.get('auth', False) or bool(security.get('keyFile'))
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return parsed.get('auth', False) or bool(parsed.get('keyFile'))
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# Legacy
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argv = command_line['argv']
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return '--auth' in argv or '--keyFile' in argv
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def server_started_with_nojournal(client):
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command_line = get_command_line(client)
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# MongoDB 2.6.
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if 'parsed' in command_line:
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parsed = command_line['parsed']
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if 'storage' in parsed:
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storage = parsed['storage']
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if 'journal' in storage:
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return not storage['journal']['enabled']
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return server_started_with_option(client, '--nojournal', 'nojournal')
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def server_is_master_with_slave(client):
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command_line = get_command_line(client)
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if 'parsed' in command_line:
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return command_line['parsed'].get('master', False)
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return '--master' in command_line['argv']
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def drop_collections(db):
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for coll in db.list_collection_names():
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if not coll.startswith('system'):
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db.drop_collection(coll)
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def remove_all_users(db):
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db.command("dropAllUsersFromDatabase", 1,
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writeConcern={"w": client_context.w})
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def joinall(threads):
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"""Join threads with a 5-minute timeout, assert joins succeeded"""
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for t in threads:
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t.join(300)
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assert not t.isAlive(), "Thread %s hung" % t
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def connected(client):
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"""Convenience to wait for a newly-constructed client to connect."""
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with warnings.catch_warnings():
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# Ignore warning that "ismaster" is always routed to primary even
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# if client's read preference isn't PRIMARY.
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warnings.simplefilter("ignore", UserWarning)
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client.admin.command('ismaster') # Force connection.
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return client
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def wait_until(predicate, success_description, timeout=10):
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"""Wait up to 10 seconds (by default) for predicate to be true.
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E.g.:
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wait_until(lambda: client.primary == ('a', 1),
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'connect to the primary')
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If the lambda-expression isn't true after 10 seconds, we raise
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AssertionError("Didn't ever connect to the primary").
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Returns the predicate's first true value.
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"""
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start = time.time()
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while True:
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retval = predicate()
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if retval:
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return retval
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if time.time() - start > timeout:
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raise AssertionError("Didn't ever %s" % success_description)
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time.sleep(0.1)
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def is_mongos(client):
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res = client.admin.command('ismaster')
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return res.get('msg', '') == 'isdbgrid'
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def assertRaisesExactly(cls, fn, *args, **kwargs):
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"""
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Unlike the standard assertRaises, this checks that a function raises a
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specific class of exception, and not a subclass. E.g., check that
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MongoClient() raises ConnectionFailure but not its subclass, AutoReconnect.
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"""
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try:
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fn(*args, **kwargs)
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except Exception as e:
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assert e.__class__ == cls, "got %s, expected %s" % (
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e.__class__.__name__, cls.__name__)
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else:
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raise AssertionError("%s not raised" % cls)
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@contextlib.contextmanager
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def _ignore_deprecations():
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with warnings.catch_warnings():
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warnings.simplefilter("ignore", DeprecationWarning)
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yield
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def ignore_deprecations(wrapped=None):
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"""A context manager or a decorator."""
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if wrapped:
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@functools.wraps(wrapped)
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def wrapper(*args, **kwargs):
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with _ignore_deprecations():
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return wrapped(*args, **kwargs)
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return wrapper
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else:
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return _ignore_deprecations()
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class DeprecationFilter(object):
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def __init__(self, action="ignore"):
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"""Start filtering deprecations."""
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self.warn_context = warnings.catch_warnings()
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self.warn_context.__enter__()
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warnings.simplefilter(action, DeprecationWarning)
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def stop(self):
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"""Stop filtering deprecations."""
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self.warn_context.__exit__()
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self.warn_context = None
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def get_pool(client):
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"""Get the standalone, primary, or mongos pool."""
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topology = client._get_topology()
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server = topology.select_server(writable_server_selector)
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return server.pool
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def get_pools(client):
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"""Get all pools."""
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return [
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server.pool for server in
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client._get_topology().select_servers(any_server_selector)]
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# Constants for run_threads and lazy_client_trial.
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NTRIALS = 5
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NTHREADS = 10
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def run_threads(collection, target):
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"""Run a target function in many threads.
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target is a function taking a Collection and an integer.
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"""
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threads = []
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for i in range(NTHREADS):
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bound_target = partial(target, collection, i)
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threads.append(threading.Thread(target=bound_target))
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for t in threads:
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t.start()
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for t in threads:
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t.join(60)
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assert not t.isAlive()
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@contextlib.contextmanager
|
|
def frequent_thread_switches():
|
|
"""Make concurrency bugs more likely to manifest."""
|
|
interval = None
|
|
if not sys.platform.startswith('java'):
|
|
if hasattr(sys, 'getswitchinterval'):
|
|
interval = sys.getswitchinterval()
|
|
sys.setswitchinterval(1e-6)
|
|
else:
|
|
interval = sys.getcheckinterval()
|
|
sys.setcheckinterval(1)
|
|
|
|
try:
|
|
yield
|
|
finally:
|
|
if not sys.platform.startswith('java'):
|
|
if hasattr(sys, 'setswitchinterval'):
|
|
sys.setswitchinterval(interval)
|
|
else:
|
|
sys.setcheckinterval(interval)
|
|
|
|
|
|
def lazy_client_trial(reset, target, test, get_client):
|
|
"""Test concurrent operations on a lazily-connecting client.
|
|
|
|
`reset` takes a collection and resets it for the next trial.
|
|
|
|
`target` takes a lazily-connecting collection and an index from
|
|
0 to NTHREADS, and performs some operation, e.g. an insert.
|
|
|
|
`test` takes the lazily-connecting collection and asserts a
|
|
post-condition to prove `target` succeeded.
|
|
"""
|
|
collection = client_context.client.pymongo_test.test
|
|
|
|
with frequent_thread_switches():
|
|
for i in range(NTRIALS):
|
|
reset(collection)
|
|
lazy_client = get_client()
|
|
lazy_collection = lazy_client.pymongo_test.test
|
|
run_threads(lazy_collection, target)
|
|
test(lazy_collection)
|
|
|
|
|
|
def gevent_monkey_patched():
|
|
"""Check if gevent's monkey patching is active."""
|
|
# In Python 3.6 importing gevent.socket raises an ImportWarning.
|
|
with warnings.catch_warnings():
|
|
warnings.simplefilter("ignore", ImportWarning)
|
|
try:
|
|
import socket
|
|
import gevent.socket
|
|
return socket.socket is gevent.socket.socket
|
|
except ImportError:
|
|
return False
|
|
|
|
|
|
def eventlet_monkey_patched():
|
|
"""Check if eventlet's monkey patching is active."""
|
|
try:
|
|
import threading
|
|
import eventlet
|
|
return (threading.current_thread.__module__ ==
|
|
'eventlet.green.threading')
|
|
except ImportError:
|
|
return False
|
|
|
|
|
|
def is_greenthread_patched():
|
|
return gevent_monkey_patched() or eventlet_monkey_patched()
|
|
|
|
|
|
def disable_replication(client):
|
|
"""Disable replication on all secondaries, requires MongoDB 3.2."""
|
|
for host, port in client.secondaries:
|
|
secondary = single_client(host, port)
|
|
secondary.admin.command('configureFailPoint', 'stopReplProducer',
|
|
mode='alwaysOn')
|
|
|
|
|
|
def enable_replication(client):
|
|
"""Enable replication on all secondaries, requires MongoDB 3.2."""
|
|
for host, port in client.secondaries:
|
|
secondary = single_client(host, port)
|
|
secondary.admin.command('configureFailPoint', 'stopReplProducer',
|
|
mode='off')
|