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test_read_write_concern_spec.py
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# Copyright 2018-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.
"""Run the read and write concern tests."""
import json
import os
import sys
import warnings
sys.path[0:0] = [""]
from pymongo import DESCENDING
from pymongo.errors import (BulkWriteError,
ConfigurationError,
WTimeoutError,
WriteConcernError)
from pymongo.mongo_client import MongoClient
from pymongo.operations import IndexModel, InsertOne
from pymongo.read_concern import ReadConcern
from pymongo.write_concern import WriteConcern
from test import client_context, unittest
from test.utils import (IMPOSSIBLE_WRITE_CONCERN,
EventListener,
disable_replication,
enable_replication,
rs_or_single_client)
_TEST_PATH = os.path.join(
os.path.dirname(os.path.realpath(__file__)), 'read_write_concern')
class TestReadWriteConcernSpec(unittest.TestCase):
@client_context.require_connection
def test_omit_default_read_write_concern(self):
listener = EventListener()
# Client with default readConcern and writeConcern
client = rs_or_single_client(event_listeners=[listener])
collection = client.pymongo_test.collection
# Prepare for tests of find() and aggregate().
collection.insert_many([{} for _ in range(10)])
self.addCleanup(collection.drop)
self.addCleanup(client.pymongo_test.collection2.drop)
# Commands MUST NOT send the default read/write concern to the server.
def rename_and_drop():
# Ensure collection exists.
collection.insert_one({})
collection.rename('collection2')
client.pymongo_test.collection2.drop()
def insert_command_default_write_concern():
collection.database.command(
'insert', 'collection', documents=[{}],
write_concern=WriteConcern())
ops = [
('aggregate', lambda: list(collection.aggregate([]))),
('find', lambda: list(collection.find())),
('insert_one', lambda: collection.insert_one({})),
('update_one',
lambda: collection.update_one({}, {'$set': {'x': 1}})),
('update_many',
lambda: collection.update_many({}, {'$set': {'x': 1}})),
('delete_one', lambda: collection.delete_one({})),
('delete_many', lambda: collection.delete_many({})),
('bulk_write', lambda: collection.bulk_write([InsertOne({})])),
('rename_and_drop', rename_and_drop),
('command', insert_command_default_write_concern)
]
for name, f in ops:
listener.results.clear()
f()
self.assertGreaterEqual(len(listener.results['started']), 1)
for i, event in enumerate(listener.results['started']):
self.assertNotIn(
'readConcern', event.command,
"%s sent default readConcern with %s" % (
name, event.command_name))
self.assertNotIn(
'writeConcern', event.command,
"%s sent default writeConcern with %s" % (
name, event.command_name))
def assertWriteOpsRaise(self, write_concern, expected_exception):
client = rs_or_single_client(**write_concern.document)
db = client.get_database('pymongo_test')
coll = db.test
def insert_command():
coll.database.command(
'insert', 'new_collection', documents=[{}],
writeConcern=write_concern.document,
parse_write_concern_error=True)
ops = [
('insert_one', lambda: coll.insert_one({})),
('insert_many', lambda: coll.insert_many([{}, {}])),
('update_one', lambda: coll.update_one({}, {'$set': {'x': 1}})),
('update_many', lambda: coll.update_many({}, {'$set': {'x': 1}})),
('delete_one', lambda: coll.delete_one({})),
('delete_many', lambda: coll.delete_many({})),
('bulk_write', lambda: coll.bulk_write([InsertOne({})])),
('command', insert_command),
]
ops_require_34 = [
('aggregate', lambda: coll.aggregate([{'$out': 'out'}])),
('create_index', lambda: coll.create_index([('a', DESCENDING)])),
('create_indexes', lambda: coll.create_indexes([IndexModel('b')])),
('drop_index', lambda: coll.drop_index([('a', DESCENDING)])),
('create', lambda: db.create_collection('new')),
('rename', lambda: coll.rename('new')),
('drop', lambda: db.new.drop()),
]
if client_context.version > (3, 4):
ops.extend(ops_require_34)
# SERVER-34776: Drop database does not respect wtimeout in 4.0.
if client_context.version <= (3, 6):
ops.append(('drop_database', lambda: client.drop_database(db)))
for name, f in ops:
# Ensure insert_many and bulk_write still raise BulkWriteError.
if name in ('insert_many', 'bulk_write'):
expected = BulkWriteError
else:
expected = expected_exception
with self.assertRaises(expected, msg=name) as cm:
f()
if expected == BulkWriteError:
bulk_result = cm.exception.details
wc_errors = bulk_result['writeConcernErrors']
self.assertTrue(wc_errors)
@client_context.require_replica_set
def test_raise_write_concern_error(self):
self.addCleanup(client_context.client.drop_database, 'pymongo_test')
self.assertWriteOpsRaise(
WriteConcern(w=client_context.w+1, wtimeout=1), WriteConcernError)
# MongoDB 3.2 introduced the stopReplProducer failpoint.
@client_context.require_version_min(3, 2)
@client_context.require_secondaries_count(1)
@client_context.require_test_commands
def test_raise_wtimeout(self):
self.addCleanup(client_context.client.drop_database, 'pymongo_test')
self.addCleanup(enable_replication, client_context.client)
# Disable replication to guarantee a wtimeout error.
disable_replication(client_context.client)
self.assertWriteOpsRaise(WriteConcern(w=client_context.w, wtimeout=1),
WTimeoutError)
def normalize_write_concern(concern):
result = {}
for key in concern:
if key.lower() == 'wtimeoutms':
result['wtimeout'] = concern[key]
elif key == 'journal':
result['j'] = concern[key]
else:
result[key] = concern[key]
return result
def create_connection_string_test(test_case):
def run_test(self):
uri = test_case['uri']
valid = test_case['valid']
warning = test_case['warning']
if not valid:
if warning is False:
self.assertRaises(
(ConfigurationError, ValueError),
MongoClient,
uri,
connect=False)
else:
with warnings.catch_warnings():
warnings.simplefilter('error', UserWarning)
self.assertRaises(
UserWarning,
MongoClient,
uri,
connect=False)
else:
client = MongoClient(uri, connect=False)
if 'writeConcern' in test_case:
document = client.write_concern.document
self.assertEqual(
document,
normalize_write_concern(test_case['writeConcern']))
if 'readConcern' in test_case:
document = client.read_concern.document
self.assertEqual(document, test_case['readConcern'])
return run_test
def create_document_test(test_case):
def run_test(self):
valid = test_case['valid']
if 'writeConcern' in test_case:
normalized = normalize_write_concern(test_case['writeConcern'])
if not valid:
self.assertRaises(
(ConfigurationError, ValueError),
WriteConcern,
**normalized)
else:
concern = WriteConcern(**normalized)
self.assertEqual(
concern.document, test_case['writeConcernDocument'])
self.assertEqual(
concern.acknowledged, test_case['isAcknowledged'])
self.assertEqual(
concern.is_server_default, test_case['isServerDefault'])
if 'readConcern' in test_case:
# Any string for 'level' is equaly valid
concern = ReadConcern(**test_case['readConcern'])
self.assertEqual(concern.document, test_case['readConcernDocument'])
self.assertEqual(
not bool(concern.level), test_case['isServerDefault'])
return run_test
def create_tests():
for dirpath, _, filenames in os.walk(_TEST_PATH):
dirname = os.path.split(dirpath)[-1]
if dirname == 'connection-string':
create_test = create_connection_string_test
else:
create_test = create_document_test
for filename in filenames:
with open(os.path.join(dirpath, filename)) as test_stream:
test_cases = json.load(test_stream)['tests']
fname = os.path.splitext(filename)[0]
for test_case in test_cases:
new_test = create_test(test_case)
test_name = 'test_%s_%s_%s' % (
dirname.replace('-', '_'),
fname.replace('-', '_'),
str(test_case['description'].lower().replace(' ', '_')))
new_test.__name__ = test_name
setattr(TestReadWriteConcernSpec, new_test.__name__, new_test)
create_tests()
if __name__ == '__main__':
unittest.main()