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# Copyright 2024-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.
"""Tests to ensure that the async API is properly concurrent with asyncio."""
from __future__ import annotations
import asyncio
import time
from test.asynchronous import AsyncIntegrationTest, async_client_context
from test.utils_shared import delay
_IS_SYNC = False
class TestAsyncConcurrency(AsyncIntegrationTest):
async def _task(self, client):
await client.db.test.find_one({"$where": delay(0.20)})
async def test_concurrency(self):
tasks = []
iterations = 5
client = await self.async_single_client()
await client.db.test.drop()
await client.db.test.insert_one({"x": 1})
start = time.time()
for _ in range(iterations):
await self._task(client)
sequential_time = time.time() - start
start = time.time()
for i in range(iterations):
tasks.append(self._task(client))
await asyncio.gather(*tasks)
concurrent_time = time.time() - start
percent_faster = (sequential_time - concurrent_time) / concurrent_time * 100
# We expect the concurrent tasks to be at least 50% faster on all platforms as a conservative benchmark
self.assertGreaterEqual(percent_faster, 50)
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