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# Copyright (c) 2025, NVIDIA CORPORATION. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Utilities for adapter testing."""
import multiprocessing
import pytest
from flask import Flask, jsonify, request
from nemo.collections.llm.evaluation.adapters.utils import wait_for_server
DEFAULT_FAKE_RESPONSE = {
"object": "chat.completion",
"choices": [
{
"message": {
"role": "assistant",
"content": "This is a fake LLM response</think>This survives reasoning",
}
}
],
}
def create_and_run_fake_endpoint():
"""Create and run a fake OpenAI API endpoint."""
app = Flask(__name__)
@app.route("/v1/chat/completions", methods=["POST"])
def chat_completion():
data = request.json
if "fake_response" in data:
response = data["fake_response"]
else:
response = DEFAULT_FAKE_RESPONSE
return jsonify(response)
app.run(host="localhost", port=3300)
def create_fake_endpoint_process():
"""Create a process running a fake OpenAI endpoint.
Returns:
The multiprocessing.Process object running the endpoint.
"""
p = multiprocessing.Process(target=create_and_run_fake_endpoint)
p.start()
# Wait for the server to be ready
if not wait_for_server("localhost", 3300):
p.terminate()
pytest.fail("Fake OpenAI endpoint did not start within the timeout period")
return p
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