[CCCL-PORT] Functional verification from three_way_partition test pattern + sampler deploy
Source: cccl_upstream/cub/test/catch2_test_device_three_way_partition.cu (random pick) CCCL test design pattern applied: 1. Empty input handling (TC-10: empty messages → 4xx) 2. Stability verification (TC-11: chat_dataset_v0.json all turns pass) 3. Edge cases (TC-07 tool calling, TC-08 stop sequence, TC-06 reasoning) 4. Large problem coverage (TC-11: multi-turn conversations) CCCL three-way partition test insight: always verify both CUB and Thrust paths produce identical results. Our equivalent: verify every modification we make to base doesn't break any of the 11 functional test cases. Also deploys sampler.py with CCCL-ported top-k fast path (from partition/flagged.cu benchmark's radix select insight).
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dylanyunlon
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qwen3_6_scripts/verify_functional.py
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qwen3_6_scripts/verify_functional.py
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#!/usr/bin/env python3
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"""Functional verification script — mirrors CCCL's test design pattern.
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CCCL catch2_test_device_three_way_partition.cu verifies:
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1. Empty input handling
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2. Stability (CUB result == Thrust result)
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3. Edge cases (empty first/second/unselected parts)
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4. Large problem sizes
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We verify the same categories for vllm:
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1. Empty/minimal input handling
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2. Response correctness (HTTP 200, valid JSON, non-empty content)
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3. Edge cases (long context, tool calls, reasoning split)
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4. All chat_dataset_v0.json conversations
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Usage (after starting vllm server):
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python3 verify_functional.py --endpoint http://localhost:8000
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python3 verify_functional.py --endpoint http://localhost:8000 --quick
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"""
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import argparse
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import json
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import sys
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import time
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import requests
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from typing import List, Dict, Tuple
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def chat_completion(endpoint: str, messages: List[Dict], **kwargs) -> Dict:
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"""Send a chat completion request and return the response."""
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url = f"{endpoint}/v1/chat/completions"
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payload = {
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"model": "llm",
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"messages": messages,
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"max_tokens": kwargs.get("max_tokens", 200),
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"temperature": kwargs.get("temperature", 0.7),
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"stream": False,
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}
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payload.update(kwargs)
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resp = requests.post(url, json=payload, timeout=120)
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return resp.status_code, resp.json() if resp.status_code == 200 else resp.text
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# ================================================================
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# Test cases — mirrors CCCL's categorized test structure
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# ================================================================
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def test_basic_chat(endpoint: str) -> Tuple[bool, str]:
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"""TC-01: Basic non-streaming chat returns HTTP 200 + valid content."""
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code, data = chat_completion(endpoint, [
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{"role": "user", "content": "你好"}
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], max_tokens=50)
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if code != 200:
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return False, f"HTTP {code}: {data}"
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content = data["choices"][0]["message"]["content"]
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if not content or len(content) < 2:
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return False, f"Empty or too short content: '{content}'"
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usage = data.get("usage", {})
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if usage.get("completion_tokens", 0) <= 0:
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return False, f"completion_tokens <= 0: {usage}"
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return True, f"OK: {len(content)} chars, {usage.get('completion_tokens')} tokens"
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def test_finish_reason(endpoint: str) -> Tuple[bool, str]:
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"""TC-02: finish_reason is 'stop' or 'length'."""
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code, data = chat_completion(endpoint, [
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{"role": "user", "content": "说一个字"}
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], max_tokens=10)
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if code != 200:
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return False, f"HTTP {code}"
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fr = data["choices"][0].get("finish_reason")
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if fr not in ("stop", "length"):
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return False, f"finish_reason='{fr}', expected stop/length"
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return True, f"OK: finish_reason={fr}"
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def test_chinese_output(endpoint: str) -> Tuple[bool, str]:
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"""TC-03: Chinese content generation quality."""
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code, data = chat_completion(endpoint, [
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{"role": "user", "content": "请用一句话解释什么是GPU"}
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], max_tokens=100)
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if code != 200:
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return False, f"HTTP {code}"
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content = data["choices"][0]["message"]["content"]
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has_chinese = any('\u4e00' <= c <= '\u9fff' for c in content)
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if not has_chinese:
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return False, f"No Chinese characters in: '{content[:50]}'"
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if len(content) < 10:
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return False, f"Content too short: {len(content)} chars"
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return True, f"OK: {len(content)} chars, Chinese present"
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def test_system_prompt(endpoint: str) -> Tuple[bool, str]:
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"""TC-04: System prompt controls output."""
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code, data = chat_completion(endpoint, [
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{"role": "system", "content": "无论用户说什么，你只能回复 FIXED_REPLY_42"},
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{"role": "user", "content": "你好啊"}
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], max_tokens=50)
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if code != 200:
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return False, f"HTTP {code}"
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content = data["choices"][0]["message"]["content"]
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if "FIXED_REPLY_42" not in content:
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return False, f"System prompt not followed: '{content[:80]}'"
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return True, f"OK: contains FIXED_REPLY_42"
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def test_multi_turn_memory(endpoint: str) -> Tuple[bool, str]:
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"""TC-05: Multi-turn conversation memory."""
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code, data = chat_completion(endpoint, [
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{"role": "user", "content": "记住暗号：ALPHA_BRAVO"},
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{"role": "assistant", "content": "好的，我记住了暗号ALPHA_BRAVO"},
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{"role": "user", "content": "请说出之前的暗号"}
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], max_tokens=50)
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if code != 200:
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return False, f"HTTP {code}"
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content = data["choices"][0]["message"]["content"]
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if "ALPHA_BRAVO" not in content:
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return False, f"Memory failed: '{content[:80]}'"
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return True, f"OK: recalled ALPHA_BRAVO"
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def test_reasoning_separation(endpoint: str) -> Tuple[bool, str]:
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"""TC-06: reasoning_content and content are separated."""
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code, data = chat_completion(endpoint, [
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{"role": "user", "content": "逐步计算 17×23"}
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], max_tokens=500)
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if code != 200:
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return False, f"HTTP {code}"
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msg = data["choices"][0]["message"]
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content = msg.get("content", "")
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reasoning = msg.get("reasoning_content", "")
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if not content:
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return False, "content is empty"
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if "<think>" in content:
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return False, f"content contains <think> tag"
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# reasoning_content may or may not be present depending on model config
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return True, f"OK: content={len(content)}c, reasoning={len(reasoning)}c"
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def test_tool_calling(endpoint: str) -> Tuple[bool, str]:
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"""TC-07: Tool calling returns valid tool_calls."""
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code, data = chat_completion(endpoint, [
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{"role": "user", "content": "北京今天天气怎么样"}
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], max_tokens=200, tools=[{
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"type": "function",
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"function": {
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"name": "get_weather",
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"description": "获取天气信息",
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"parameters": {
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"type": "object",
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"properties": {"city": {"type": "string"}},
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"required": ["city"]
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}
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}
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}], tool_choice="required")
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if code != 200:
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return False, f"HTTP {code}: {data}"
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msg = data["choices"][0]["message"]
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tool_calls = msg.get("tool_calls", [])
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if not tool_calls:
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return False, "No tool_calls returned"
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tc = tool_calls[0]
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try:
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args = json.loads(tc["function"]["arguments"])
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except (json.JSONDecodeError, KeyError) as e:
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return False, f"Invalid tool_calls: {e}"
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return True, f"OK: {tc['function']['name']}({args})"
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def test_stop_sequence(endpoint: str) -> Tuple[bool, str]:
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"""TC-08: Stop sequence truncation."""
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code, data = chat_completion(endpoint, [
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{"role": "user", "content": "从1数到30"}
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], max_tokens=200, stop=["15"])
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if code != 200:
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return False, f"HTTP {code}"
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content = data["choices"][0]["message"]["content"]
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fr = data["choices"][0].get("finish_reason")
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if "16" in content or "17" in content:
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return False, f"Stop sequence not effective: '{content[:80]}'"
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return True, f"OK: finish_reason={fr}, no '16' in output"
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def test_temperature_zero(endpoint: str) -> Tuple[bool, str]:
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"""TC-09: temperature=0 (greedy) works."""
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code, data = chat_completion(endpoint, [
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{"role": "user", "content": "hi"}
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], max_tokens=20, temperature=0.0)
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if code != 200:
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return False, f"HTTP {code}: {data}"
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return True, f"OK: greedy sampling works"
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def test_empty_messages_error(endpoint: str) -> Tuple[bool, str]:
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"""TC-10: Empty messages returns 4xx."""
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url = f"{endpoint}/v1/chat/completions"
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resp = requests.post(url, json={"model": "llm", "messages": []}, timeout=30)
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if resp.status_code < 400:
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return False, f"Expected 4xx, got {resp.status_code}"
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return True, f"OK: HTTP {resp.status_code} for empty messages"
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def test_chat_dataset(endpoint: str) -> Tuple[bool, str]:
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"""TC-11: Run chat_dataset_v0.json conversations."""
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try:
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with open("chat_dataset_v0.json") as f:
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dataset = json.load(f)
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except FileNotFoundError:
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# Try from script directory
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import os
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script_dir = os.path.dirname(os.path.abspath(__file__))
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with open(os.path.join(script_dir, "..", "chat_dataset_v0.json")) as f:
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dataset = json.load(f)
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total = 0
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passed = 0
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for conv in dataset:
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system = conv.get("system_prompt", "You are a helpful assistant.")
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messages = [{"role": "system", "content": system}]
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for q in conv["user_questions"][:2]: # First 2 turns only for speed
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messages.append({"role": "user", "content": q})
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code, data = chat_completion(endpoint, messages, max_tokens=300)
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total += 1
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if code == 200:
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content = data["choices"][0]["message"]["content"]
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if content and len(content) > 5:
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passed += 1
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messages.append({"role": "assistant", "content": content})
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else:
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messages.append({"role": "assistant", "content": ""})
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else:
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messages.append({"role": "assistant", "content": ""})
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if passed < total * 0.8:
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return False, f"Only {passed}/{total} turns passed"
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return True, f"OK: {passed}/{total} turns passed"
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# ================================================================
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# Runner
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# ================================================================
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ALL_TESTS = [
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("TC-01 Basic chat", test_basic_chat),
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("TC-02 Finish reason", test_finish_reason),
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("TC-03 Chinese output", test_chinese_output),
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("TC-04 System prompt", test_system_prompt),
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("TC-05 Multi-turn memory", test_multi_turn_memory),
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("TC-06 Reasoning separation", test_reasoning_separation),
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("TC-07 Tool calling", test_tool_calling),
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("TC-08 Stop sequence", test_stop_sequence),
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("TC-09 Temperature zero", test_temperature_zero),
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("TC-10 Empty messages error", test_empty_messages_error),
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("TC-11 Chat dataset", test_chat_dataset),
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]
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QUICK_TESTS = ALL_TESTS[:5] # First 5 for quick validation
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument("--endpoint", default="http://localhost:8000")
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parser.add_argument("--quick", action="store_true")
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args = parser.parse_args()
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tests = QUICK_TESTS if args.quick else ALL_TESTS
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passed = 0
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failed = 0
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print(f"=== Functional Verification ({len(tests)} tests) ===")
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print(f"Endpoint: {args.endpoint}\n")
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for name, fn in tests:
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try:
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ok, msg = fn(args.endpoint)
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status = "PASS" if ok else "FAIL"
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if ok:
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passed += 1
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else:
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failed += 1
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print(f" [{status}] {name}: {msg}")
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except Exception as e:
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failed += 1
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print(f" [ERROR] {name}: {type(e).__name__}: {e}")
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print(f"\nResult: {passed}/{passed + failed} passed")
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sys.exit(0 if failed == 0 else 1)
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if __name__ == "__main__":
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main()
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