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#!/usr/bin/env python3
"""P0 MCP SDK interoperability and long-running connection regression test."""
from __future__ import annotations
import argparse
import asyncio
import json
import os
import shutil
import tempfile
from pathlib import Path
from mcp.client.session import ClientSession
from mcp.client.stdio import StdioServerParameters, stdio_client
from mcp.types import CallToolResult
def payload(result: CallToolResult) -> dict:
if result.isError:
raise AssertionError(f"tool error: {result.content!r}")
texts = [item.text for item in result.content if item.type == "text"]
return json.loads("".join(texts))
async def run(server: Path, iterations: int) -> None:
data_dir = Path(tempfile.mkdtemp(prefix="tiny-convmem-sdk-p0-"))
params = StdioServerParameters(
command=str(server.resolve()),
args=["--data-dir", str(data_dir)],
env=dict(os.environ),
)
completed = 0
with tempfile.TemporaryFile(mode="w+", encoding="utf-8") as errlog:
try:
async with stdio_client(params, errlog=errlog) as (read_stream, write_stream):
async with ClientSession(read_stream, write_stream) as session:
await session.initialize()
listed = await session.list_tools()
assert {tool.name for tool in listed.tools} == {
"write_message",
"read_messages",
"search_messages",
"delete_message",
"rebuild_index",
"get_system_health",
}
for index in range(20):
payload(
await session.call_tool(
"write_message",
{
"session_id": "target",
"role": "user",
"content": f"sdk needle target {index}",
},
)
)
for index in range(10):
payload(
await session.call_tool(
"write_message",
{
"session_id": "other",
"role": "user",
"content": f"sdk needle other {index}",
},
)
)
for index in range(iterations):
arguments = {"query": "needle"}
if index % 2:
arguments["session_id"] = "target"
results = payload(
await session.call_tool("search_messages", arguments)
)["results"]
assert len(results) == 20
if index % 2:
assert all(item["session_id"] == "target" for item in results)
completed += 1
errlog.flush()
errlog.seek(0)
server_stderr = errlog.read()
if "AddressSanitizer" in server_stderr or "ERROR:" in server_stderr:
raise AssertionError(f"server diagnostics reported a failure:\n{server_stderr}")
except Exception as exc:
errlog.flush()
errlog.seek(0)
raise RuntimeError(
f"failed after {completed}/{iterations} calls; server stderr:\n{errlog.read()}"
) from exc
finally:
shutil.rmtree(data_dir, ignore_errors=True)
def main() -> None:
parser = argparse.ArgumentParser()
parser.add_argument("--server", type=Path, required=True)
parser.add_argument("--iterations", type=int, default=1000)
args = parser.parse_args()
asyncio.run(run(args.server, args.iterations))
print(f"Python MCP SDK completed {args.iterations} alternating searches")
if __name__ == "__main__":
main()
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