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 Remove outdated test workaround for killAllSessions.
645 lines
26 KiB
Python
645 lines
26 KiB
Python
# Copyright 2018-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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"""Execute Transactions Spec tests."""
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import os
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import sys
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sys.path[0:0] = [""]
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from bson.py3compat import iteritems
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from bson.son import SON
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from pymongo import client_session, operations, WriteConcern
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from pymongo.client_session import TransactionOptions
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from pymongo.command_cursor import CommandCursor
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from pymongo.cursor import Cursor
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from pymongo.errors import (ConfigurationError,
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OperationFailure,
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PyMongoError)
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from pymongo.operations import IndexModel, InsertOne
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from pymongo.read_concern import ReadConcern
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from pymongo.read_preferences import ReadPreference
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from pymongo.results import _WriteResult, BulkWriteResult
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from test import unittest, client_context, IntegrationTest, client_knobs
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from test.utils import (camel_to_snake, camel_to_upper_camel,
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camel_to_snake_args, rs_client, single_client,
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wait_until, CompareType, OvertCommandListener,
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TestCreator)
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from test.utils_selection_tests import parse_read_preference
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# Location of JSON test specifications.
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_TEST_PATH = os.path.join(
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os.path.dirname(os.path.realpath(__file__)), 'transactions')
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_TXN_TESTS_DEBUG = os.environ.get('TRANSACTION_TESTS_DEBUG')
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# Max number of operations to perform after a transaction to prove unpinning
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# occurs. Chosen so that there's a low false positive rate. With 2 mongoses,
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# 50 attempts yields a one in a quadrillion chance of a false positive
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# (1/(0.5^50)).
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UNPIN_TEST_MAX_ATTEMPTS = 50
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class TestTransactions(IntegrationTest):
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@classmethod
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def setUpClass(cls):
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super(TestTransactions, cls).setUpClass()
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# Speed up tests by reducing SDAM waiting time after a network error.
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cls.knobs = client_knobs(min_heartbeat_interval=0.1)
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cls.knobs.enable()
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cls.mongos_clients = []
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if client_context.supports_transactions():
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for address in client_context.mongoses:
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cls.mongos_clients.append(single_client('%s:%s' % address))
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@classmethod
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def tearDownClass(cls):
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cls.knobs.disable()
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super(TestTransactions, cls).tearDownClass()
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def transaction_test_debug(self, msg):
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if _TXN_TESTS_DEBUG:
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print(msg)
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def assertErrorLabelsContain(self, exc, expected_labels):
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labels = [l for l in expected_labels if exc.has_error_label(l)]
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self.assertEqual(labels, expected_labels)
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def assertErrorLabelsOmit(self, exc, omit_labels):
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for label in omit_labels:
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self.assertFalse(
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exc.has_error_label(label),
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msg='error labels should not contain %s' % (label,))
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def _set_fail_point(self, client, command_args):
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cmd = SON([('configureFailPoint', 'failCommand')])
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cmd.update(command_args)
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client.admin.command(cmd)
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def set_fail_point(self, command_args):
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cmd = SON([('configureFailPoint', 'failCommand')])
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cmd.update(command_args)
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clients = self.mongos_clients if self.mongos_clients else [self.client]
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for client in clients:
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self._set_fail_point(client, cmd)
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def targeted_fail_point(self, session, fail_point):
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"""Run the targetedFailPoint test operation.
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Enable the fail point on the session's pinned mongos.
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"""
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clients = {c.address: c for c in self.mongos_clients}
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client = clients[session._pinned_address]
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self._set_fail_point(client, fail_point)
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def assert_session_pinned(self, session):
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"""Assert that the given session is pinned."""
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self.assertIsNotNone(session._transaction.pinned_address)
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def assert_session_unpinned(self, session):
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"""Assert that the given session is not pinned."""
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self.assertIsNone(session._pinned_address)
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self.assertIsNone(session._transaction.pinned_address)
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def kill_all_sessions(self):
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clients = self.mongos_clients if self.mongos_clients else [self.client]
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for client in clients:
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try:
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client.admin.command('killAllSessions', [])
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except OperationFailure:
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# "operation was interrupted" by killing the command's
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# own session.
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pass
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@client_context.require_transactions
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def test_transaction_options_validation(self):
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default_options = TransactionOptions()
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self.assertIsNone(default_options.read_concern)
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self.assertIsNone(default_options.write_concern)
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self.assertIsNone(default_options.read_preference)
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TransactionOptions(read_concern=ReadConcern(),
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write_concern=WriteConcern(),
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read_preference=ReadPreference.PRIMARY)
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with self.assertRaisesRegex(TypeError, "read_concern must be "):
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TransactionOptions(read_concern={})
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with self.assertRaisesRegex(TypeError, "write_concern must be "):
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TransactionOptions(write_concern={})
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with self.assertRaisesRegex(
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ConfigurationError,
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"transactions do not support unacknowledged write concern"):
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TransactionOptions(write_concern=WriteConcern(w=0))
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with self.assertRaisesRegex(
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TypeError, "is not valid for read_preference"):
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TransactionOptions(read_preference={})
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@client_context.require_transactions
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def test_transaction_write_concern_override(self):
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"""Test txn overrides Client/Database/Collection write_concern."""
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client = rs_client(w=0)
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self.addCleanup(client.close)
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db = client.test
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coll = db.test
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coll.insert_one({})
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with client.start_session() as s:
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with s.start_transaction(write_concern=WriteConcern(w=1)):
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self.assertTrue(coll.insert_one({}, session=s).acknowledged)
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self.assertTrue(coll.insert_many(
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[{}, {}], session=s).acknowledged)
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self.assertTrue(coll.bulk_write(
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[InsertOne({})], session=s).acknowledged)
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self.assertTrue(coll.replace_one(
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{}, {}, session=s).acknowledged)
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self.assertTrue(coll.update_one(
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{}, {"$set": {"a": 1}}, session=s).acknowledged)
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self.assertTrue(coll.update_many(
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{}, {"$set": {"a": 1}}, session=s).acknowledged)
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self.assertTrue(coll.delete_one({}, session=s).acknowledged)
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self.assertTrue(coll.delete_many({}, session=s).acknowledged)
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coll.find_one_and_delete({}, session=s)
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coll.find_one_and_replace({}, {}, session=s)
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coll.find_one_and_update({}, {"$set": {"a": 1}}, session=s)
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unsupported_txn_writes = [
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(client.drop_database, [db.name], {}),
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(db.create_collection, ['collection'], {}),
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(db.drop_collection, ['collection'], {}),
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(coll.drop, [], {}),
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(coll.map_reduce,
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['function() {}', 'function() {}', 'output'], {}),
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(coll.rename, ['collection2'], {}),
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# Drop collection2 between tests of "rename", above.
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(coll.database.drop_collection, ['collection2'], {}),
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(coll.create_indexes, [[IndexModel('a')]], {}),
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(coll.create_index, ['a'], {}),
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(coll.drop_index, ['a_1'], {}),
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(coll.drop_indexes, [], {}),
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(coll.aggregate, [[{"$out": "aggout"}]], {}),
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]
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for op in unsupported_txn_writes:
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op, args, kwargs = op
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with client.start_session() as s:
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kwargs['session'] = s
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s.start_transaction(write_concern=WriteConcern(w=1))
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with self.assertRaises(OperationFailure):
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op(*args, **kwargs)
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s.abort_transaction()
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@client_context.require_transactions
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@client_context.require_multiple_mongoses
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def test_unpin_for_next_transaction(self):
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# Increase localThresholdMS and wait until both nodes are discovered
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# to avoid false positives.
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client = rs_client(client_context.mongos_seeds(),
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localThresholdMS=1000)
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wait_until(lambda: len(client.nodes) > 1, "discover both mongoses")
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coll = client.test.test
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# Create the collection.
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coll.insert_one({})
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self.addCleanup(client.close)
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with client.start_session() as s:
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# Session is pinned to Mongos.
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with s.start_transaction():
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coll.insert_one({}, session=s)
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addresses = set()
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for _ in range(UNPIN_TEST_MAX_ATTEMPTS):
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with s.start_transaction():
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cursor = coll.find({}, session=s)
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self.assertTrue(next(cursor))
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addresses.add(cursor.address)
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# Break early if we can.
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if len(addresses) > 1:
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break
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self.assertGreater(len(addresses), 1)
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@client_context.require_transactions
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@client_context.require_multiple_mongoses
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def test_unpin_for_non_transaction_operation(self):
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# Increase localThresholdMS and wait until both nodes are discovered
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# to avoid false positives.
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client = rs_client(client_context.mongos_seeds(),
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localThresholdMS=1000)
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wait_until(lambda: len(client.nodes) > 1, "discover both mongoses")
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coll = client.test.test
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# Create the collection.
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coll.insert_one({})
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self.addCleanup(client.close)
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with client.start_session() as s:
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# Session is pinned to Mongos.
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with s.start_transaction():
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coll.insert_one({}, session=s)
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addresses = set()
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for _ in range(UNPIN_TEST_MAX_ATTEMPTS):
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cursor = coll.find({}, session=s)
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self.assertTrue(next(cursor))
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addresses.add(cursor.address)
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# Break early if we can.
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if len(addresses) > 1:
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break
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self.assertGreater(len(addresses), 1)
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def check_command_result(self, expected_result, result):
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# Only compare the keys in the expected result.
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filtered_result = {}
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for key in expected_result:
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try:
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filtered_result[key] = result[key]
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except KeyError:
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pass
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self.assertEqual(filtered_result, expected_result)
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# TODO: factor the following function with CRUD v2 test runner.
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def check_result(self, expected_result, result):
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if isinstance(result, _WriteResult):
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for res in expected_result:
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prop = camel_to_snake(res)
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# SPEC-869: Only BulkWriteResult has upserted_count.
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if (prop == "upserted_count"
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and not isinstance(result, BulkWriteResult)):
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if result.upserted_id is not None:
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upserted_count = 1
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else:
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upserted_count = 0
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self.assertEqual(upserted_count, expected_result[res], prop)
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elif prop == "inserted_ids":
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# BulkWriteResult does not have inserted_ids.
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if isinstance(result, BulkWriteResult):
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self.assertEqual(len(expected_result[res]),
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result.inserted_count)
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else:
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# InsertManyResult may be compared to [id1] from the
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# crud spec or {"0": id1} from the retryable write spec.
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ids = expected_result[res]
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if isinstance(ids, dict):
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ids = [ids[str(i)] for i in range(len(ids))]
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self.assertEqual(ids, result.inserted_ids, prop)
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elif prop == "upserted_ids":
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# Convert indexes from strings to integers.
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ids = expected_result[res]
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expected_ids = {}
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for str_index in ids:
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expected_ids[int(str_index)] = ids[str_index]
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self.assertEqual(expected_ids, result.upserted_ids, prop)
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else:
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self.assertEqual(
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getattr(result, prop), expected_result[res], prop)
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return True
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else:
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self.assertEqual(result, expected_result)
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def run_operation(self, sessions, collection, operation):
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name = camel_to_snake(operation['name'])
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if name == 'run_command':
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name = 'command'
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self.transaction_test_debug(name)
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def parse_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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database = collection.database
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collection = database.get_collection(collection.name)
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if 'collectionOptions' in operation:
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collection = collection.with_options(
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**dict(parse_options(operation['collectionOptions'])))
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objects = {
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'database': database,
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'collection': collection,
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'testRunner': self
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}
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objects.update(sessions)
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obj = objects[operation['object']]
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# Combine arguments with options and handle special cases.
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arguments = operation.get('arguments', {})
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arguments.update(arguments.pop("options", {}))
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parse_options(arguments)
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cmd = getattr(obj, name)
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for arg_name in list(arguments):
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c2s = camel_to_snake(arg_name)
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# PyMongo accepts sort as list of tuples.
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if arg_name == "sort":
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sort_dict = arguments[arg_name]
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arguments[arg_name] = list(iteritems(sort_dict))
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# Named "key" instead not fieldName.
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if arg_name == "fieldName":
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arguments["key"] = arguments.pop(arg_name)
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# Aggregate uses "batchSize", while find uses batch_size.
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elif arg_name == "batchSize" and name == "aggregate":
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continue
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# Requires boolean returnDocument.
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elif arg_name == "returnDocument":
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arguments[c2s] = arguments[arg_name] == "After"
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elif c2s == "requests":
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# Parse each request into a bulk write model.
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requests = []
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for request in arguments["requests"]:
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bulk_model = camel_to_upper_camel(request["name"])
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bulk_class = getattr(operations, bulk_model)
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bulk_arguments = camel_to_snake_args(request["arguments"])
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requests.append(bulk_class(**dict(bulk_arguments)))
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arguments["requests"] = requests
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elif arg_name == "session":
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arguments['session'] = sessions[arguments['session']]
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elif name == 'command' and arg_name == 'command':
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# Ensure the first key is the command name.
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ordered_command = SON([(operation['command_name'], 1)])
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ordered_command.update(arguments['command'])
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arguments['command'] = ordered_command
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else:
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arguments[c2s] = arguments.pop(arg_name)
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result = cmd(**dict(arguments))
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if name == "aggregate":
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if arguments["pipeline"] and "$out" in arguments["pipeline"][-1]:
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# Read from the primary to ensure causal consistency.
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out = collection.database.get_collection(
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arguments["pipeline"][-1]["$out"],
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read_preference=ReadPreference.PRIMARY)
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return out.find()
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if isinstance(result, Cursor) or isinstance(result, CommandCursor):
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return list(result)
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return result
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# TODO: factor with test_command_monitoring.py
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def check_events(self, test, listener, session_ids):
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res = listener.results
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if not len(test['expectations']):
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return
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self.assertEqual(len(res['started']), len(test['expectations']))
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for i, expectation in enumerate(test['expectations']):
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event_type = next(iter(expectation))
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event = res['started'][i]
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# The tests substitute 42 for any number other than 0.
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if (event.command_name == 'getMore'
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and event.command['getMore']):
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event.command['getMore'] = 42
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elif event.command_name == 'killCursors':
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event.command['cursors'] = [42]
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# Replace afterClusterTime: 42 with actual afterClusterTime.
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expected_cmd = expectation[event_type]['command']
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expected_read_concern = expected_cmd.get('readConcern')
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if expected_read_concern is not None:
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time = expected_read_concern.get('afterClusterTime')
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if time == 42:
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actual_time = event.command.get(
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'readConcern', {}).get('afterClusterTime')
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if actual_time is not None:
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expected_read_concern['afterClusterTime'] = actual_time
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recovery_token = expected_cmd.get('recoveryToken')
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if recovery_token == 42:
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expected_cmd['recoveryToken'] = CompareType(dict)
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# Replace lsid with a name like "session0" to match test.
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if 'lsid' in event.command:
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for name, lsid in session_ids.items():
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if event.command['lsid'] == lsid:
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event.command['lsid'] = name
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break
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for attr, expected in expectation[event_type].items():
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actual = getattr(event, attr)
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if isinstance(expected, dict):
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for key, val in expected.items():
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if val is None:
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if key in actual:
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self.fail("Unexpected key [%s] in %r" % (
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key, actual))
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elif key not in actual:
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self.fail("Expected key [%s] in %r" % (
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key, actual))
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else:
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self.assertEqual(val, actual[key],
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"Key [%s] in %s" % (key, actual))
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else:
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self.assertEqual(actual, expected)
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def expect_error_message(expected_result):
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if isinstance(expected_result, dict):
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return expected_result['errorContains']
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return False
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def expect_error_code(expected_result):
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if isinstance(expected_result, dict):
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return expected_result['errorCodeName']
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return False
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def expect_error_labels_contain(expected_result):
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if isinstance(expected_result, dict):
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return expected_result['errorLabelsContain']
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return False
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def expect_error_labels_omit(expected_result):
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if isinstance(expected_result, dict):
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return expected_result['errorLabelsOmit']
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return False
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def expect_error(expected_result):
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return (expect_error_message(expected_result)
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|
or expect_error_code(expected_result)
|
|
or expect_error_labels_contain(expected_result)
|
|
or expect_error_labels_omit(expected_result))
|
|
|
|
|
|
def end_sessions(sessions):
|
|
for s in sessions.values():
|
|
# Aborts the transaction if it's open.
|
|
s.end_session()
|
|
|
|
|
|
def create_test(scenario_def, test, name):
|
|
@client_context.require_transactions
|
|
@client_context.require_cluster_type(
|
|
scenario_def.get('topology', ['single', 'replicaset', 'sharded']))
|
|
def run_scenario(self):
|
|
if test.get('skipReason'):
|
|
raise unittest.SkipTest(test.get('skipReason'))
|
|
|
|
listener = OvertCommandListener()
|
|
# Create a new client, to avoid interference from pooled sessions.
|
|
# Convert test['clientOptions'] to dict to avoid a Jython bug using
|
|
# "**" with ScenarioDict.
|
|
client_options = dict(test['clientOptions'])
|
|
use_multi_mongos = test['useMultipleMongoses']
|
|
if client_context.is_mongos and use_multi_mongos:
|
|
client = rs_client(client_context.mongos_seeds(),
|
|
event_listeners=[listener], **client_options)
|
|
else:
|
|
client = rs_client(event_listeners=[listener], **client_options)
|
|
# Close the client explicitly to avoid having too many threads open.
|
|
self.addCleanup(client.close)
|
|
|
|
# Kill all sessions before and after each test to prevent an open
|
|
# transaction (from a test failure) from blocking collection/database
|
|
# operations during test set up and tear down.
|
|
self.kill_all_sessions()
|
|
self.addCleanup(self.kill_all_sessions)
|
|
|
|
database_name = scenario_def['database_name']
|
|
collection_name = scenario_def['collection_name']
|
|
write_concern_db = client.get_database(
|
|
database_name, write_concern=WriteConcern(w='majority'))
|
|
write_concern_coll = write_concern_db[collection_name]
|
|
write_concern_coll.drop()
|
|
write_concern_db.create_collection(collection_name)
|
|
if scenario_def['data']:
|
|
# Load data.
|
|
write_concern_coll.insert_many(scenario_def['data'])
|
|
|
|
# Create session0 and session1.
|
|
sessions = {}
|
|
session_ids = {}
|
|
for i in range(2):
|
|
session_name = 'session%d' % i
|
|
opts = camel_to_snake_args(test['sessionOptions'][session_name])
|
|
if 'default_transaction_options' in opts:
|
|
txn_opts = opts['default_transaction_options']
|
|
if 'readConcern' in txn_opts:
|
|
read_concern = ReadConcern(
|
|
**dict(txn_opts['readConcern']))
|
|
else:
|
|
read_concern = None
|
|
if 'writeConcern' in txn_opts:
|
|
write_concern = WriteConcern(
|
|
**dict(txn_opts['writeConcern']))
|
|
else:
|
|
write_concern = None
|
|
|
|
if 'readPreference' in txn_opts:
|
|
read_pref = parse_read_preference(
|
|
txn_opts['readPreference'])
|
|
else:
|
|
read_pref = None
|
|
|
|
txn_opts = client_session.TransactionOptions(
|
|
read_concern=read_concern,
|
|
write_concern=write_concern,
|
|
read_preference=read_pref,
|
|
)
|
|
opts['default_transaction_options'] = txn_opts
|
|
|
|
s = client.start_session(**dict(opts))
|
|
|
|
sessions[session_name] = s
|
|
# Store lsid so we can access it after end_session, in check_events.
|
|
session_ids[session_name] = s.session_id
|
|
|
|
self.addCleanup(end_sessions, sessions)
|
|
|
|
if 'failPoint' in test:
|
|
self.set_fail_point(test['failPoint'])
|
|
self.addCleanup(self.set_fail_point, {
|
|
'configureFailPoint': 'failCommand', 'mode': 'off'})
|
|
|
|
listener.results.clear()
|
|
collection = client[database_name][collection_name]
|
|
|
|
for op in test['operations']:
|
|
expected_result = op.get('result')
|
|
if expect_error(expected_result):
|
|
with self.assertRaises(PyMongoError,
|
|
msg=op['name']) as context:
|
|
self.run_operation(sessions, collection, op.copy())
|
|
|
|
if expect_error_message(expected_result):
|
|
self.assertIn(expected_result['errorContains'].lower(),
|
|
str(context.exception).lower())
|
|
if expect_error_code(expected_result):
|
|
self.assertEqual(expected_result['errorCodeName'],
|
|
context.exception.details.get('codeName'))
|
|
if expect_error_labels_contain(expected_result):
|
|
self.assertErrorLabelsContain(
|
|
context.exception,
|
|
expected_result['errorLabelsContain'])
|
|
if expect_error_labels_omit(expected_result):
|
|
self.assertErrorLabelsOmit(
|
|
context.exception,
|
|
expected_result['errorLabelsOmit'])
|
|
else:
|
|
result = self.run_operation(sessions, collection, op.copy())
|
|
if 'result' in op:
|
|
if op['name'] == 'runCommand':
|
|
self.check_command_result(expected_result, result)
|
|
else:
|
|
self.check_result(expected_result, result)
|
|
|
|
for s in sessions.values():
|
|
s.end_session()
|
|
|
|
self.check_events(test, listener, session_ids)
|
|
|
|
# Disable fail points.
|
|
self.set_fail_point({
|
|
'configureFailPoint': 'failCommand', 'mode': 'off'})
|
|
|
|
# Assert final state is expected.
|
|
expected_c = test['outcome'].get('collection')
|
|
if expected_c is not None:
|
|
# Read from the primary with local read concern to ensure causal
|
|
# consistency.
|
|
primary_coll = collection.with_options(
|
|
read_preference=ReadPreference.PRIMARY,
|
|
read_concern=ReadConcern('local'))
|
|
self.assertEqual(list(primary_coll.find()), expected_c['data'])
|
|
|
|
if 'secondary' in name:
|
|
run_scenario = client_context._require(
|
|
lambda: client_context.has_secondaries or client_context.is_mongos,
|
|
'No secondaries',
|
|
run_scenario)
|
|
|
|
return run_scenario
|
|
|
|
|
|
test_creator = TestCreator(create_test, TestTransactions, _TEST_PATH)
|
|
test_creator.create_tests()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|