737 lines
29 KiB
Python
737 lines
29 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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from __future__ import annotations
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import asyncio
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import random
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import sys
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import time
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from io import BytesIO
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from unittest.mock import patch
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import pymongo
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from gridfs.asynchronous.grid_file import AsyncGridFS, AsyncGridFSBucket
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from pymongo.asynchronous.pool import PoolState
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from pymongo.server_selectors import writable_server_selector
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sys.path[0:0] = [""]
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from test.asynchronous import AsyncIntegrationTest, async_client_context, unittest
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from test.utils_shared import (
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OvertCommandListener,
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async_wait_until,
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)
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from typing import List
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from bson import encode
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from bson.raw_bson import RawBSONDocument
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from pymongo import WriteConcern, _csot
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from pymongo.asynchronous import client_session
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from pymongo.asynchronous.client_session import TransactionOptions
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from pymongo.asynchronous.command_cursor import AsyncCommandCursor
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from pymongo.asynchronous.cursor import AsyncCursor
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from pymongo.asynchronous.helpers import anext
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from pymongo.errors import (
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AutoReconnect,
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CollectionInvalid,
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ConfigurationError,
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ConnectionFailure,
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ExecutionTimeout,
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InvalidOperation,
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NetworkTimeout,
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OperationFailure,
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)
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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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_IS_SYNC = False
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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 AsyncTransactionsBase(AsyncIntegrationTest):
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pass
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class TestTransactions(AsyncTransactionsBase):
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@async_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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self.assertIsNone(default_options.max_commit_time_ms)
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# No error when valid options are provided.
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TransactionOptions(
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read_concern=ReadConcern(),
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write_concern=WriteConcern(),
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read_preference=ReadPreference.PRIMARY,
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max_commit_time_ms=10000,
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)
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with self.assertRaisesRegex(TypeError, "read_concern must be "):
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TransactionOptions(read_concern={}) # type: ignore
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with self.assertRaisesRegex(TypeError, "write_concern must be "):
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TransactionOptions(write_concern={}) # type: ignore
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with self.assertRaisesRegex(
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ConfigurationError, "transactions do not support unacknowledged write concern"
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):
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TransactionOptions(write_concern=WriteConcern(w=0))
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with self.assertRaisesRegex(TypeError, "is not valid for read_preference"):
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TransactionOptions(read_preference={}) # type: ignore
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with self.assertRaisesRegex(TypeError, "max_commit_time_ms must be an integer or None"):
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TransactionOptions(max_commit_time_ms="10000") # type: ignore
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@async_client_context.require_transactions
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async def test_transaction_write_concern_override(self):
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"""Test txn overrides Client/Database/Collection write_concern."""
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client = await self.async_rs_client(w=0)
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db = client.test
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coll = db.test
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await coll.insert_one({})
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async with client.start_session() as s:
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async with await s.start_transaction(write_concern=WriteConcern(w=1)):
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self.assertTrue((await coll.insert_one({}, session=s)).acknowledged)
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self.assertTrue((await coll.insert_many([{}, {}], session=s)).acknowledged)
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self.assertTrue((await coll.bulk_write([InsertOne({})], session=s)).acknowledged)
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self.assertTrue((await coll.replace_one({}, {}, session=s)).acknowledged)
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self.assertTrue(
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(await coll.update_one({}, {"$set": {"a": 1}}, session=s)).acknowledged
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)
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self.assertTrue(
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(await coll.update_many({}, {"$set": {"a": 1}}, session=s)).acknowledged
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)
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self.assertTrue((await coll.delete_one({}, session=s)).acknowledged)
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self.assertTrue((await coll.delete_many({}, session=s)).acknowledged)
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await coll.find_one_and_delete({}, session=s)
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await coll.find_one_and_replace({}, {}, session=s)
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await coll.find_one_and_update({}, {"$set": {"a": 1}}, session=s)
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unsupported_txn_writes: list = [
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(client.drop_database, [db.name], {}),
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(db.drop_collection, ["collection"], {}),
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(coll.drop, [], {}),
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(coll.rename, ["collection2"], {}),
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# Drop collection2 between tests of "rename", above.
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(coll.database.drop_collection, ["collection2"], {}),
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(coll.create_indexes, [[IndexModel("a")]], {}),
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(coll.create_index, ["a"], {}),
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(coll.drop_index, ["a_1"], {}),
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(coll.drop_indexes, [], {}),
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(coll.aggregate, [[{"$out": "aggout"}]], {}),
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]
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# Creating a collection in a transaction requires MongoDB 4.4+.
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if async_client_context.version < (4, 3, 4):
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unsupported_txn_writes.extend(
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[
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(db.create_collection, ["collection"], {}),
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]
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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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async with client.start_session() as s:
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kwargs["session"] = s
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await s.start_transaction(write_concern=WriteConcern(w=1))
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with self.assertRaises(OperationFailure):
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await op(*args, **kwargs)
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await s.abort_transaction()
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@async_client_context.require_transactions
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@async_client_context.require_multiple_mongoses
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async 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 = await self.async_rs_client(
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async_client_context.mongos_seeds(), localThresholdMS=1000
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)
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await async_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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await coll.insert_one({})
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async with client.start_session() as s:
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# Session is pinned to Mongos.
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async with await s.start_transaction():
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await 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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async with await s.start_transaction():
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cursor = coll.find({}, session=s)
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self.assertTrue(await anext(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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@async_client_context.require_transactions
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@async_client_context.require_multiple_mongoses
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async 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 = await self.async_rs_client(
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async_client_context.mongos_seeds(), localThresholdMS=1000
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)
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await async_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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await coll.insert_one({})
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async with client.start_session() as s:
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# Session is pinned to Mongos.
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async with await s.start_transaction():
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await 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(await anext(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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@async_client_context.require_transactions
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@async_client_context.require_version_min(4, 3, 4)
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async def test_create_collection(self):
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client = async_client_context.client
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db = client.pymongo_test
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coll = db.test_create_collection
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self.addAsyncCleanup(coll.drop)
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# Use with_transaction to avoid StaleConfig errors on sharded clusters.
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async def create_and_insert(session):
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coll2 = await db.create_collection(coll.name, session=session)
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self.assertEqual(coll, coll2)
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await coll.insert_one({}, session=session)
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async with client.start_session() as s:
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await s.with_transaction(create_and_insert)
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# Outside a transaction we raise CollectionInvalid on existing colls.
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with self.assertRaises(CollectionInvalid):
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await db.create_collection(coll.name)
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# Inside a transaction we raise the OperationFailure from create.
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async with client.start_session() as s:
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await s.start_transaction()
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with self.assertRaises(OperationFailure) as ctx:
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await db.create_collection(coll.name, session=s)
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self.assertEqual(ctx.exception.code, 48) # NamespaceExists
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@async_client_context.require_transactions
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async def test_gridfs_does_not_support_transactions(self):
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client = async_client_context.client
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db = client.pymongo_test
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gfs = AsyncGridFS(db)
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bucket = AsyncGridFSBucket(db)
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async def gridfs_find(*args, **kwargs):
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return await gfs.find(*args, **kwargs).next()
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async def gridfs_open_upload_stream(*args, **kwargs):
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await (await bucket.open_upload_stream(*args, **kwargs)).write(b"1")
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gridfs_ops = [
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(gfs.put, (b"123",)),
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(gfs.get, (1,)),
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(gfs.get_version, ("name",)),
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(gfs.get_last_version, ("name",)),
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(gfs.delete, (1,)),
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(gfs.list, ()),
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(gfs.find_one, ()),
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(gridfs_find, ()),
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(gfs.exists, ()),
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(gridfs_open_upload_stream, ("name",)),
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(
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bucket.upload_from_stream,
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(
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"name",
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b"data",
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),
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),
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(
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bucket.download_to_stream,
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(
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1,
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BytesIO(),
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),
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),
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(
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bucket.download_to_stream_by_name,
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(
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"name",
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BytesIO(),
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),
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),
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(bucket.delete, (1,)),
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(bucket.find, ()),
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(bucket.open_download_stream, (1,)),
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(bucket.open_download_stream_by_name, ("name",)),
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(
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bucket.rename,
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(
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1,
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"new-name",
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),
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),
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(
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bucket.rename_by_name,
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(
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"new-name",
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"new-name2",
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),
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),
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(bucket.delete_by_name, ("new-name2",)),
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]
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async with client.start_session() as s, await s.start_transaction():
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for op, args in gridfs_ops:
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with self.assertRaisesRegex(
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InvalidOperation,
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"GridFS does not support multi-document transactions",
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):
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await op(*args, session=s) # type: ignore
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# Require 4.2+ for large (16MB+) transactions.
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@async_client_context.require_version_min(4, 2)
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@async_client_context.require_transactions
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@unittest.skipIf(sys.platform == "win32", "Our Windows machines are too slow to pass this test")
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async def test_transaction_starts_with_batched_write(self):
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if "PyPy" in sys.version and async_client_context.tls:
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self.skipTest(
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"PYTHON-2937 PyPy is so slow sending large "
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"messages over TLS that this test fails"
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)
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# Start a transaction with a batch of operations that needs to be
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# split.
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listener = OvertCommandListener()
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client = await self.async_rs_client(event_listeners=[listener])
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coll = client[self.db.name].test
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await coll.delete_many({})
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listener.reset()
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self.addAsyncCleanup(coll.drop)
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large_str = "\0" * (1 * 1024 * 1024)
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ops: List[InsertOne[RawBSONDocument]] = [
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InsertOne(RawBSONDocument(encode({"a": large_str}))) for _ in range(48)
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]
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async with client.start_session() as session:
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async with await session.start_transaction():
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await coll.bulk_write(ops, session=session) # type: ignore[arg-type]
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# Assert commands were constructed properly.
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self.assertEqual(
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["insert", "insert", "commitTransaction"], listener.started_command_names()
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)
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first_cmd = listener.started_events[0].command
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self.assertTrue(first_cmd["startTransaction"])
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lsid = first_cmd["lsid"]
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txn_number = first_cmd["txnNumber"]
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for event in listener.started_events[1:]:
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self.assertNotIn("startTransaction", event.command)
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self.assertEqual(lsid, event.command["lsid"])
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self.assertEqual(txn_number, event.command["txnNumber"])
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self.assertEqual(48, await coll.count_documents({}))
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@async_client_context.require_transactions
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async def test_transaction_direct_connection(self):
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client = await self.async_single_client()
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coll = client.pymongo_test.test
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# Make sure the collection exists.
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await coll.insert_one({})
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self.assertEqual(client.topology_description.topology_type_name, "Single")
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async def find(*args, **kwargs):
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return coll.find(*args, **kwargs)
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async def find_raw_batches(*args, **kwargs):
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return coll.find_raw_batches(*args, **kwargs)
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ops = [
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(coll.bulk_write, [[InsertOne[dict]({})]]),
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(coll.insert_one, [{}]),
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(coll.insert_many, [[{}, {}]]),
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(coll.replace_one, [{}, {}]),
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(coll.update_one, [{}, {"$set": {"a": 1}}]),
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(coll.update_many, [{}, {"$set": {"a": 1}}]),
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(coll.delete_one, [{}]),
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(coll.delete_many, [{}]),
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(coll.find_one_and_replace, [{}, {}]),
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(coll.find_one_and_update, [{}, {"$set": {"a": 1}}]),
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(coll.find_one_and_delete, [{}, {}]),
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(coll.find_one, [{}]),
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(coll.count_documents, [{}]),
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(coll.distinct, ["foo"]),
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(coll.aggregate, [[]]),
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(find, [{}]),
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(coll.aggregate_raw_batches, [[]]),
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(find_raw_batches, [{}]),
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(coll.database.command, ["find", coll.name]),
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]
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for f, args in ops:
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async with client.start_session() as s, await s.start_transaction():
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res = await f(*args, session=s) # type:ignore[operator]
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if isinstance(res, (AsyncCommandCursor, AsyncCursor)):
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await res.to_list()
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@async_client_context.require_transactions
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async def test_transaction_pool_cleared_error_labelled_transient(self):
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c = await self.async_single_client()
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with self.assertRaises(AutoReconnect) as context:
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async with c.start_session() as session:
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async with await session.start_transaction():
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server = await c._select_server(writable_server_selector, session, "test")
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# Pause the server's pool, causing it to fail connection checkout.
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server.pool.state = PoolState.PAUSED
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async with c._checkout(server, session):
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pass
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# Verify that the TransientTransactionError label is present in the error.
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self.assertTrue(context.exception.has_error_label("TransientTransactionError"))
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class PatchSessionTimeout:
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"""Patches the client_session's with_transaction timeout for testing."""
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def __init__(self, mock_timeout):
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self.real_timeout = client_session._WITH_TRANSACTION_RETRY_TIME_LIMIT
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self.mock_timeout = mock_timeout
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def __enter__(self):
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client_session._WITH_TRANSACTION_RETRY_TIME_LIMIT = self.mock_timeout
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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client_session._WITH_TRANSACTION_RETRY_TIME_LIMIT = self.real_timeout
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class TestTransactionsConvenientAPI(AsyncTransactionsBase):
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async def asyncSetUp(self) -> None:
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await super().asyncSetUp()
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self.mongos_clients = []
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if async_client_context.supports_transactions():
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for address in async_client_context.mongoses:
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self.mongos_clients.append(await self.async_single_client("{}:{}".format(*address)))
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async def set_fail_point(self, 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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await self.configure_fail_point(client, command_args)
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@async_client_context.require_transactions
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async def test_1_callback_raises_custom_error(self):
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class _MyException(Exception):
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pass
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async def raise_error(_):
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raise _MyException
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async with self.client.start_session() as s:
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with self.assertRaises(_MyException):
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await s.with_transaction(raise_error)
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@async_client_context.require_transactions
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async def test_2_callback_returns_value(self):
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async def callback(_):
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return "Foo"
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async with self.client.start_session() as s:
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self.assertEqual(await s.with_transaction(callback), "Foo")
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await self.db.test.insert_one({})
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async def callback2(session):
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await self.db.test.insert_one({}, session=session)
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return "Foo"
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async with self.client.start_session() as s:
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self.assertEqual(await s.with_transaction(callback2), "Foo")
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@async_client_context.require_transactions
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@async_client_context.require_async
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async def test_callback_awaitable_no_coroutine(self):
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def callback(_):
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future = asyncio.Future()
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future.set_result("Foo")
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return future
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async with self.client.start_session() as s:
|
|
self.assertEqual(await s.with_transaction(callback), "Foo")
|
|
|
|
@async_client_context.require_transactions
|
|
async def test_3_1_callback_not_retried_after_timeout(self):
|
|
listener = OvertCommandListener()
|
|
client = await self.async_rs_client(event_listeners=[listener])
|
|
coll = client[self.db.name].test
|
|
|
|
async def callback(session):
|
|
await coll.insert_one({}, session=session)
|
|
err: dict = {
|
|
"ok": 0,
|
|
"errmsg": "Transaction 7819 has been aborted.",
|
|
"code": 251,
|
|
"codeName": "NoSuchTransaction",
|
|
"errorLabels": ["TransientTransactionError"],
|
|
}
|
|
raise OperationFailure(err["errmsg"], err["code"], err)
|
|
|
|
# Create the collection.
|
|
await coll.insert_one({})
|
|
listener.reset()
|
|
async with client.start_session() as s:
|
|
with PatchSessionTimeout(0):
|
|
with self.assertRaises(NetworkTimeout) as context:
|
|
await s.with_transaction(callback)
|
|
|
|
self.assertEqual(listener.started_command_names(), ["insert", "abortTransaction"])
|
|
# Assert that the timeout error has the same labels as the error it wraps.
|
|
self.assertTrue(context.exception.has_error_label("TransientTransactionError"))
|
|
|
|
@async_client_context.require_test_commands
|
|
@async_client_context.require_transactions
|
|
async def test_3_2_callback_not_retried_after_commit_timeout(self):
|
|
listener = OvertCommandListener()
|
|
client = await self.async_rs_client(event_listeners=[listener])
|
|
coll = client[self.db.name].test
|
|
|
|
async def callback(session):
|
|
await coll.insert_one({}, session=session)
|
|
|
|
# Create the collection.
|
|
await coll.insert_one({})
|
|
await self.set_fail_point(
|
|
{
|
|
"configureFailPoint": "failCommand",
|
|
"mode": {"times": 1},
|
|
"data": {
|
|
"failCommands": ["commitTransaction"],
|
|
"errorCode": 251, # NoSuchTransaction
|
|
},
|
|
}
|
|
)
|
|
self.addAsyncCleanup(
|
|
self.set_fail_point, {"configureFailPoint": "failCommand", "mode": "off"}
|
|
)
|
|
listener.reset()
|
|
|
|
async with client.start_session() as s:
|
|
with PatchSessionTimeout(0):
|
|
with self.assertRaises(NetworkTimeout) as context:
|
|
await s.with_transaction(callback)
|
|
|
|
self.assertEqual(listener.started_command_names(), ["insert", "commitTransaction"])
|
|
# Assert that the timeout error has the same labels as the error it wraps.
|
|
self.assertTrue(context.exception.has_error_label("TransientTransactionError"))
|
|
|
|
@async_client_context.require_test_commands
|
|
@async_client_context.require_transactions
|
|
async def test_3_3_commit_not_retried_after_timeout(self):
|
|
listener = OvertCommandListener()
|
|
client = await self.async_rs_client(event_listeners=[listener])
|
|
coll = client[self.db.name].test
|
|
|
|
async def callback(session):
|
|
await coll.insert_one({}, session=session)
|
|
|
|
# Create the collection.
|
|
await coll.insert_one({})
|
|
await self.set_fail_point(
|
|
{
|
|
"configureFailPoint": "failCommand",
|
|
"mode": {"times": 2},
|
|
"data": {"failCommands": ["commitTransaction"], "closeConnection": True},
|
|
}
|
|
)
|
|
self.addAsyncCleanup(
|
|
self.set_fail_point, {"configureFailPoint": "failCommand", "mode": "off"}
|
|
)
|
|
listener.reset()
|
|
|
|
async with client.start_session() as s:
|
|
with PatchSessionTimeout(0):
|
|
with self.assertRaises(NetworkTimeout) as context:
|
|
await s.with_transaction(callback)
|
|
|
|
# One insert for the callback and two commits (includes the automatic
|
|
# retry).
|
|
self.assertEqual(
|
|
listener.started_command_names(), ["insert", "commitTransaction", "commitTransaction"]
|
|
)
|
|
# Assert that the timeout error has the same labels as the error it wraps.
|
|
self.assertTrue(context.exception.has_error_label("UnknownTransactionCommitResult"))
|
|
|
|
@async_client_context.require_transactions
|
|
async def test_callback_not_retried_after_csot_timeout(self):
|
|
listener = OvertCommandListener()
|
|
client = await self.async_rs_client(event_listeners=[listener])
|
|
coll = client[self.db.name].test
|
|
|
|
async def callback(session):
|
|
await coll.insert_one({}, session=session)
|
|
err: dict = {
|
|
"ok": 0,
|
|
"errmsg": "Transaction 7819 has been aborted.",
|
|
"code": 251,
|
|
"codeName": "NoSuchTransaction",
|
|
"errorLabels": ["TransientTransactionError"],
|
|
}
|
|
raise OperationFailure(err["errmsg"], err["code"], err)
|
|
|
|
# Create the collection.
|
|
await coll.insert_one({})
|
|
listener.reset()
|
|
async with client.start_session() as s:
|
|
with pymongo.timeout(1.0):
|
|
with self.assertRaises(ExecutionTimeout):
|
|
await s.with_transaction(callback)
|
|
|
|
# At least two attempts: the original and one or more retries.
|
|
inserts = len([x for x in listener.started_command_names() if x == "insert"])
|
|
aborts = len([x for x in listener.started_command_names() if x == "abortTransaction"])
|
|
|
|
self.assertGreaterEqual(inserts, 2)
|
|
self.assertGreaterEqual(aborts, 2)
|
|
|
|
# Tested here because this supports Motor's convenient transactions API.
|
|
@async_client_context.require_transactions
|
|
async def test_in_transaction_property(self):
|
|
client = async_client_context.client
|
|
coll = client.test.testcollection
|
|
await coll.insert_one({})
|
|
self.addAsyncCleanup(coll.drop)
|
|
|
|
async with client.start_session() as s:
|
|
self.assertFalse(s.in_transaction)
|
|
await s.start_transaction()
|
|
self.assertTrue(s.in_transaction)
|
|
await coll.insert_one({}, session=s)
|
|
self.assertTrue(s.in_transaction)
|
|
await s.commit_transaction()
|
|
self.assertFalse(s.in_transaction)
|
|
|
|
async with client.start_session() as s:
|
|
await s.start_transaction()
|
|
# commit empty transaction
|
|
await s.commit_transaction()
|
|
self.assertFalse(s.in_transaction)
|
|
|
|
async with client.start_session() as s:
|
|
await s.start_transaction()
|
|
await s.abort_transaction()
|
|
self.assertFalse(s.in_transaction)
|
|
|
|
# Using a callback
|
|
async def callback(session):
|
|
self.assertTrue(session.in_transaction)
|
|
|
|
async with client.start_session() as s:
|
|
self.assertFalse(s.in_transaction)
|
|
await s.with_transaction(callback)
|
|
self.assertFalse(s.in_transaction)
|
|
|
|
@async_client_context.require_test_commands
|
|
@async_client_context.require_transactions
|
|
async def test_4_retry_backoff_is_enforced(self):
|
|
client = async_client_context.client
|
|
coll = client[self.db.name].test
|
|
end = start = no_backoff_time = 0
|
|
|
|
# Make random.random always return 0 (no backoff)
|
|
with patch.object(random, "random", return_value=0):
|
|
# set fail point to trigger transaction failure and trigger backoff
|
|
await self.set_fail_point(
|
|
{
|
|
"configureFailPoint": "failCommand",
|
|
"mode": {"times": 13},
|
|
"data": {
|
|
"failCommands": ["commitTransaction"],
|
|
"errorCode": 251,
|
|
},
|
|
}
|
|
)
|
|
self.addAsyncCleanup(
|
|
self.set_fail_point, {"configureFailPoint": "failCommand", "mode": "off"}
|
|
)
|
|
|
|
async def callback(session):
|
|
await coll.insert_one({}, session=session)
|
|
|
|
start = time.monotonic()
|
|
async with self.client.start_session() as s:
|
|
await s.with_transaction(callback)
|
|
end = time.monotonic()
|
|
no_backoff_time = end - start
|
|
|
|
# Make random.random always return 1 (max backoff)
|
|
with patch.object(random, "random", return_value=1):
|
|
# set fail point to trigger transaction failure and trigger backoff
|
|
await self.set_fail_point(
|
|
{
|
|
"configureFailPoint": "failCommand",
|
|
"mode": {
|
|
"times": 13
|
|
}, # sufficiently high enough such that the time effect of backoff is noticeable
|
|
"data": {
|
|
"failCommands": ["commitTransaction"],
|
|
"errorCode": 251,
|
|
},
|
|
}
|
|
)
|
|
self.addAsyncCleanup(
|
|
self.set_fail_point, {"configureFailPoint": "failCommand", "mode": "off"}
|
|
)
|
|
start = time.monotonic()
|
|
async with self.client.start_session() as s:
|
|
await s.with_transaction(callback)
|
|
end = time.monotonic()
|
|
self.assertLess(abs(end - start - (no_backoff_time + 2.2)), 1) # sum of 13 backoffs is 2.2
|
|
|
|
|
|
class TestOptionsInsideTransactionProse(AsyncTransactionsBase):
|
|
@async_client_context.require_transactions
|
|
@async_client_context.require_no_standalone
|
|
async def test_case_1(self):
|
|
# Write concern not inherited from collection object inside transaction
|
|
# Create a MongoClient running against a configured sharded/replica set/load balanced cluster.
|
|
client = async_client_context.client
|
|
coll = client[self.db.name].test
|
|
await coll.delete_many({})
|
|
# Start a new session on the client.
|
|
async with client.start_session() as s:
|
|
# Start a transaction on the session.
|
|
await s.start_transaction()
|
|
# Instantiate a collection object in the driver with a default write concern of { w: 0 }.
|
|
inner_coll = coll.with_options(write_concern=WriteConcern(w=0))
|
|
# Insert the document { n: 1 } on the instantiated collection.
|
|
result = await inner_coll.insert_one({"n": 1}, session=s)
|
|
# Commit the transaction.
|
|
await s.commit_transaction()
|
|
# End the session.
|
|
# Ensure the document was inserted and no error was thrown from the transaction.
|
|
assert result.inserted_id is not None
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|