# Copyright 2012-present MongoDB, Inc.

#

# 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.

"""Utilities for testing pymongo

"""

import collections

import contextlib

import functools

import os

import re

import sys

import threading

import time

import warnings

from collections import defaultdict

from functools import partial

from bson import json_util, py3compat

from bson.objectid import ObjectId

from pymongo import MongoClient, monitoring

from pymongo.errors import OperationFailure

from pymongo.monitoring import _SENSITIVE_COMMANDS

from pymongo.read_concern import ReadConcern

from pymongo.server_selectors import (any_server_selector,

writable_server_selector)

from pymongo.write_concern import WriteConcern

from test import client_context, db_user, db_pwd

IMPOSSIBLE_WRITE_CONCERN = WriteConcern(w=1000)

class WhiteListEventListener(monitoring.CommandListener):

def __init__(self, *commands):

self.commands = set(commands)

self.results = defaultdict(list)

def started(self, event):

if event.command_name in self.commands:

self.results['started'].append(event)

def succeeded(self, event):

if event.command_name in self.commands:

self.results['succeeded'].append(event)

def failed(self, event):

if event.command_name in self.commands:

self.results['failed'].append(event)

class EventListener(monitoring.CommandListener):

def __init__(self):

self.results = defaultdict(list)

def started(self, event):

self.results['started'].append(event)

def succeeded(self, event):

self.results['succeeded'].append(event)

def failed(self, event):

self.results['failed'].append(event)

class OvertCommandListener(EventListener):

"""A CommandListener that ignores sensitive commands."""

def started(self, event):

if event.command_name.lower() not in _SENSITIVE_COMMANDS:

super(OvertCommandListener, self).started(event)

def succeeded(self, event):

if event.command_name.lower() not in _SENSITIVE_COMMANDS:

super(OvertCommandListener, self).succeeded(event)

def failed(self, event):

if event.command_name.lower() not in _SENSITIVE_COMMANDS:

super(OvertCommandListener, self).failed(event)

class ServerAndTopologyEventListener(monitoring.ServerListener,

monitoring.TopologyListener):

"""Listens to all events."""

def __init__(self):

self.results = []

def opened(self, event):

self.results.append(event)

def description_changed(self, event):

self.results.append(event)

def closed(self, event):

self.results.append(event)

class HeartbeatEventListener(monitoring.ServerHeartbeatListener):

"""Listens to only server heartbeat events."""

def __init__(self):

self.results = []

def started(self, event):

self.results.append(event)

def succeeded(self, event):

self.results.append(event)

def failed(self, event):

self.results.append(event)

class ScenarioDict(dict):

"""Dict that returns {} for any unknown key, recursively."""

def __init__(self, data):

def convert(v):

if isinstance(v, collections.Mapping):

return ScenarioDict(v)

if isinstance(v, py3compat.string_type):

return v

if isinstance(v, collections.Sequence):

return [convert(item) for item in v]

return v

dict.__init__(self, [(k, convert(v)) for k, v in data.items()])

def __getitem__(self, item):

try:

return dict.__getitem__(self, item)

except KeyError:

# Unlike a defaultdict, don't set the key, just return a dict.

return ScenarioDict({})

class CompareType(object):

"""Class that compares equal to any object of the given type."""

def __init__(self, type):

self.type = type

def __eq__(self, other):

return isinstance(other, self.type)

def __ne__(self, other):

"""Needed for Python 2."""

return not self.__eq__(other)

class TestCreator(object):

"""Class to create test cases from specifications."""

def __init__(self, create_test, test_class, test_path):

"""Create a TestCreator object.

:Parameters:

- `create_test`: callback that returns a test case. The callback

must accept the following arguments - a dictionary containing the

entire test specification (the `scenario_def`), a dictionary

containing the specification for which the test case will be

generated (the `test_def`).

- `test_class`: the unittest.TestCase class in which to create the

test case.

- `test_path`: path to the directory containing the JSON files with

the test specifications.

"""

self._create_test = create_test

self._test_class= test_class

self.test_path = test_path

def _ensure_min_max_server_version(self, scenario_def, method):

"""Test modifier that enforces a version range for the server on a

test case."""

if 'minServerVersion' in scenario_def:

min_ver = tuple(

int(elt) for

elt in scenario_def['minServerVersion'].split('.'))

if min_ver is not None:

method = client_context.require_version_min(*min_ver)(method)

if 'maxServerVersion' in scenario_def:

max_ver = tuple(

int(elt) for

elt in scenario_def['maxServerVersion'].split('.'))

if max_ver is not None:

method = client_context.require_version_max(*max_ver)(method)

return method

def create_tests(self):

for dirpath, _, filenames in os.walk(self.test_path):

dirname = os.path.split(dirpath)[-1]

for filename in filenames:

with open(os.path.join(dirpath, filename)) as scenario_stream:

scenario_def = ScenarioDict(

json_util.loads(scenario_stream.read()))

test_type = os.path.splitext(filename)[0]

# Construct test from scenario.

for test_def in scenario_def['tests']:

test_name = 'test_%s_%s_%s' % (

dirname, test_type,

str(test_def['description'].replace(" ", "_")))

new_test = self._create_test(

scenario_def, test_def, test_name)

new_test = self._ensure_min_max_server_version(

scenario_def, new_test)

new_test.__name__ = test_name

setattr(self._test_class, new_test.__name__, new_test)

def _connection_string(h, authenticate):

if h.startswith("mongodb://"):

return h

elif client_context.auth_enabled and authenticate:

return "mongodb://%s:%s@%s" % (db_user, db_pwd, str(h))

else:

return "mongodb://%s" % (str(h),)

def _mongo_client(host, port, authenticate=True, direct=False, **kwargs):

"""Create a new client over SSL/TLS if necessary."""

host = host or client_context.host

port = port or client_context.port

client_options = client_context.default_client_options.copy()

if client_context.replica_set_name and not direct:

client_options['replicaSet'] = client_context.replica_set_name

client_options.update(kwargs)

client = MongoClient(_connection_string(host, authenticate), port,

**client_options)

return client

def single_client_noauth(h=None, p=None, **kwargs):

"""Make a direct connection. Don't authenticate."""

return _mongo_client(h, p, authenticate=False, direct=True, **kwargs)

def single_client(h=None, p=None, **kwargs):

"""Make a direct connection, and authenticate if necessary."""

return _mongo_client(h, p, direct=True, **kwargs)

def rs_client_noauth(h=None, p=None, **kwargs):

"""Connect to the replica set. Don't authenticate."""

return _mongo_client(h, p, authenticate=False, **kwargs)

def rs_client(h=None, p=None, **kwargs):

"""Connect to the replica set and authenticate if necessary."""

return _mongo_client(h, p, **kwargs)

def rs_or_single_client_noauth(h=None, p=None, **kwargs):

"""Connect to the replica set if there is one, otherwise the standalone.

Like rs_or_single_client, but does not authenticate.

"""

return _mongo_client(h, p, authenticate=False, **kwargs)

def rs_or_single_client(h=None, p=None, **kwargs):

"""Connect to the replica set if there is one, otherwise the standalone.

Authenticates if necessary.

"""

return _mongo_client(h, p, **kwargs)

def one(s):

"""Get one element of a set"""

return next(iter(s))

def oid_generated_on_process(oid):

"""Makes a determination as to whether the given ObjectId was generated

by the current process, based on the 5-byte random number in the ObjectId.

"""

return ObjectId._random() == oid.binary[4:9]

def delay(sec):

return '''function() { sleep(%f * 1000); return true; }''' % sec

def get_command_line(client):

command_line = client.admin.command('getCmdLineOpts')

assert command_line['ok'] == 1, "getCmdLineOpts() failed"

return command_line

def camel_to_snake(camel):

# Regex to convert CamelCase to snake_case.

snake = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', camel)

return re.sub('([a-z0-9])([A-Z])', r'\1_\2', snake).lower()

def camel_to_upper_camel(camel):

return camel[0].upper() + camel[1:]

def camel_to_snake_args(arguments):

for arg_name in list(arguments):

c2s = camel_to_snake(arg_name)

arguments[c2s] = arguments.pop(arg_name)

return arguments

def parse_collection_options(opts):

if 'readPreference' in opts:

opts['read_preference'] = parse_read_preference(

opts.pop('readPreference'))

if 'writeConcern' in opts:

opts['write_concern'] = WriteConcern(

**dict(opts.pop('writeConcern')))

if 'readConcern' in opts:

opts['read_concern'] = ReadConcern(

**dict(opts.pop('readConcern')))

return opts

def server_started_with_option(client, cmdline_opt, config_opt):

"""Check if the server was started with a particular option.

:Parameters:

- `cmdline_opt`: The command line option (i.e. --nojournal)

- `config_opt`: The config file option (i.e. nojournal)

"""

command_line = get_command_line(client)

if 'parsed' in command_line:

parsed = command_line['parsed']

if config_opt in parsed:

return parsed[config_opt]

argv = command_line['argv']

return cmdline_opt in argv

def server_started_with_auth(client):

try:

command_line = get_command_line(client)

except OperationFailure as e:

msg = e.details.get('errmsg', '')

if e.code == 13 or 'unauthorized' in msg or 'login' in msg:

# Unauthorized.

return True

raise

# MongoDB >= 2.0

if 'parsed' in command_line:

parsed = command_line['parsed']

# MongoDB >= 2.6

if 'security' in parsed:

security = parsed['security']

# >= rc3

if 'authorization' in security:

return security['authorization'] == 'enabled'

# < rc3

return security.get('auth', False) or bool(security.get('keyFile'))

return parsed.get('auth', False) or bool(parsed.get('keyFile'))

# Legacy

argv = command_line['argv']

return '--auth' in argv or '--keyFile' in argv

def server_started_with_nojournal(client):

command_line = get_command_line(client)

# MongoDB 2.6.

if 'parsed' in command_line:

parsed = command_line['parsed']

if 'storage' in parsed:

storage = parsed['storage']

if 'journal' in storage:

return not storage['journal']['enabled']

return server_started_with_option(client, '--nojournal', 'nojournal')

def server_is_master_with_slave(client):

command_line = get_command_line(client)

if 'parsed' in command_line:

return command_line['parsed'].get('master', False)

return '--master' in command_line['argv']

def drop_collections(db):

for coll in db.list_collection_names():

if not coll.startswith('system'):

db.drop_collection(coll)

def remove_all_users(db):

db.command("dropAllUsersFromDatabase", 1,

writeConcern={"w": client_context.w})

def joinall(threads):

"""Join threads with a 5-minute timeout, assert joins succeeded"""

for t in threads:

t.join(300)

assert not t.isAlive(), "Thread %s hung" % t

def connected(client):

"""Convenience to wait for a newly-constructed client to connect."""

with warnings.catch_warnings():

# Ignore warning that "ismaster" is always routed to primary even

# if client's read preference isn't PRIMARY.

warnings.simplefilter("ignore", UserWarning)

client.admin.command('ismaster') # Force connection.

return client

def wait_until(predicate, success_description, timeout=10):

"""Wait up to 10 seconds (by default) for predicate to be true.

E.g.:

wait_until(lambda: client.primary == ('a', 1),

'connect to the primary')

If the lambda-expression isn't true after 10 seconds, we raise

AssertionError("Didn't ever connect to the primary").

Returns the predicate's first true value.

"""

start = time.time()

while True:

retval = predicate()

if retval:

return retval

if time.time() - start > timeout:

raise AssertionError("Didn't ever %s" % success_description)

time.sleep(0.1)

def is_mongos(client):

res = client.admin.command('ismaster')

return res.get('msg', '') == 'isdbgrid'

def assertRaisesExactly(cls, fn, *args, **kwargs):

"""

Unlike the standard assertRaises, this checks that a function raises a

specific class of exception, and not a subclass. E.g., check that

MongoClient() raises ConnectionFailure but not its subclass, AutoReconnect.

"""

try:

fn(*args, **kwargs)

except Exception as e:

assert e.__class__ == cls, "got %s, expected %s" % (

e.__class__.__name__, cls.__name__)

else:

raise AssertionError("%s not raised" % cls)

@contextlib.contextmanager

def _ignore_deprecations():

with warnings.catch_warnings():

warnings.simplefilter("ignore", DeprecationWarning)

yield

def ignore_deprecations(wrapped=None):

"""A context manager or a decorator."""

if wrapped:

@functools.wraps(wrapped)

def wrapper(*args, **kwargs):

with _ignore_deprecations():

return wrapped(*args, **kwargs)

return wrapper

else:

return _ignore_deprecations()

class DeprecationFilter(object):

def __init__(self, action="ignore"):

"""Start filtering deprecations."""

self.warn_context = warnings.catch_warnings()

self.warn_context.__enter__()

warnings.simplefilter(action, DeprecationWarning)

def stop(self):

"""Stop filtering deprecations."""

self.warn_context.__exit__()

self.warn_context = None

def get_pool(client):

"""Get the standalone, primary, or mongos pool."""

topology = client._get_topology()

server = topology.select_server(writable_server_selector)

return server.pool

def get_pools(client):

"""Get all pools."""

return [

server.pool for server in

client._get_topology().select_servers(any_server_selector)]

# Constants for run_threads and lazy_client_trial.

NTRIALS = 5

NTHREADS = 10

def run_threads(collection, target):

"""Run a target function in many threads.

target is a function taking a Collection and an integer.

"""

threads = []

for i in range(NTHREADS):

bound_target = partial(target, collection, i)

threads.append(threading.Thread(target=bound_target))

for t in threads:

t.start()

for t in threads:

t.join(60)

assert not t.isAlive()

@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')