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70f2179 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 | # Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.
"""Unit tests for the interception proxy (no sandbox, no real LLM)."""
from __future__ import annotations
import json
import os
import socket
from contextlib import closing
import httpx
import pytest
import uvicorn
from fastapi import FastAPI, Request
from opencode_env.sandbox.interception import (
InterceptionProxy,
ProxyConfig,
_build_turn_record,
_strip_logprobs,
read_trace,
)
def _free_port() -> int:
with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
s.bind(("127.0.0.1", 0))
return s.getsockname()[1]
def _make_upstream_app(response_payload: dict) -> FastAPI:
app = FastAPI()
received: list[dict] = []
@app.post("/v1/chat/completions")
async def handler(request: Request):
body = await request.json()
received.append(body)
return response_payload
app.state.received = received
return app
def _run_upstream(app: FastAPI, port: int) -> uvicorn.Server:
config = uvicorn.Config(
app, host="127.0.0.1", port=port, log_level="warning", lifespan="on"
)
server = uvicorn.Server(config)
import threading
t = threading.Thread(target=server.run, daemon=True)
t.start()
import time
deadline = time.time() + 5
while time.time() < deadline:
try:
with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
s.settimeout(0.2)
if s.connect_ex(("127.0.0.1", port)) == 0:
return server
except OSError:
pass
time.sleep(0.05)
raise RuntimeError("upstream failed to start")
_FAKE_RESPONSE = {
"id": "chatcmpl-fake",
"object": "chat.completion",
"model": "test-model",
"choices": [
{
"index": 0,
"finish_reason": "stop",
"message": {"role": "assistant", "content": "hi"},
"logprobs": {
"content": [
{"token": "h", "logprob": -0.1, "top_logprobs": []},
{"token": "i", "logprob": -0.2, "top_logprobs": []},
]
},
}
],
}
def test_strip_logprobs_removes_only_logprobs_key():
sanitized = _strip_logprobs(_FAKE_RESPONSE)
choice = sanitized["choices"][0]
assert "logprobs" not in choice
assert choice["message"]["content"] == "hi"
assert choice["finish_reason"] == "stop"
def test_build_turn_record_extracts_logprobs():
record = _build_turn_record(
turn_idx=1,
request_body={"model": "test", "messages": []},
response_json=_FAKE_RESPONSE,
latency_s=0.25,
)
assert record.completion_tokens == ["h", "i"]
assert record.per_token_logps == [-0.1, -0.2]
assert record.finish_reason == "stop"
def test_read_trace_returns_empty_list_when_missing(tmp_path):
assert read_trace(tmp_path / "nonexistent.jsonl") == []
def test_proxy_forwards_captures_and_strips(tmp_path):
upstream_port = _free_port()
proxy_port = _free_port()
trace = tmp_path / "trace.jsonl"
upstream_app = _make_upstream_app(_FAKE_RESPONSE)
upstream_server = _run_upstream(upstream_app, upstream_port)
cfg = ProxyConfig(
upstream_url=f"http://127.0.0.1:{upstream_port}",
upstream_api_key="test-key",
trace_path=str(trace),
host="127.0.0.1",
port=proxy_port,
top_logprobs=5,
)
with InterceptionProxy(cfg) as proxy:
assert proxy.url == f"http://127.0.0.1:{proxy_port}/v1"
# Sanity: healthz
r = httpx.get(f"http://127.0.0.1:{proxy_port}/healthz")
assert r.status_code == 200
# Chat completion round trip
req_body = {
"model": "openai_compatible/foo",
"messages": [{"role": "user", "content": "hi"}],
"temperature": 0.0,
}
r = httpx.post(
f"http://127.0.0.1:{proxy_port}/v1/chat/completions",
json=req_body,
headers={"Authorization": "Bearer whatever"},
timeout=10,
)
assert r.status_code == 200
returned = r.json()
# logprobs stripped from what opencode sees
assert "logprobs" not in returned["choices"][0]
assert returned["choices"][0]["message"]["content"] == "hi"
# Upstream got logprobs=true injected
forwarded = upstream_app.state.received
assert len(forwarded) == 1
assert forwarded[0]["logprobs"] is True
assert forwarded[0]["top_logprobs"] == 5
# Authorization carries upstream_api_key
# Trace file has one line with captured logprobs
records = read_trace(trace)
assert len(records) == 1
rec = records[0]
assert rec["turn"] == 1
assert rec["completion_tokens"] == ["h", "i"]
assert rec["per_token_logps"] == [-0.1, -0.2]
assert rec["finish_reason"] == "stop"
assert rec["request"]["messages"][0]["content"] == "hi"
upstream_server.should_exit = True
def test_proxy_handles_invalid_json_body(tmp_path):
upstream_port = _free_port()
proxy_port = _free_port()
upstream_server = _run_upstream(_make_upstream_app(_FAKE_RESPONSE), upstream_port)
cfg = ProxyConfig(
upstream_url=f"http://127.0.0.1:{upstream_port}",
trace_path=str(tmp_path / "trace.jsonl"),
host="127.0.0.1",
port=proxy_port,
)
with InterceptionProxy(cfg):
r = httpx.post(
f"http://127.0.0.1:{proxy_port}/v1/chat/completions",
content=b"not json",
headers={"Content-Type": "application/json"},
timeout=10,
)
assert r.status_code == 400
upstream_server.should_exit = True
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