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modelcontextprotocol--pytho…/examples/stories/serve_one/client.py
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chore: import upstream snapshot with attribution
2026-07-13 12:10:27 +08:00

40 lines
1.6 KiB
Python

"""Drive `handle_one` directly to assert the raw result-dict shape, then over the wire."""
import mcp_types as types
from mcp_types.version import LATEST_MODERN_VERSION
from mcp.client import Client
from stories._harness import Target, run_client
from stories.serve_one.server import build_server, handle_one
async def main(target: Target, *, mode: str = "auto") -> None:
# ── direct: the namesake recipe — Connection.from_envelope + serve_one → raw result dict.
# The entry enters lifespan once and threads it to every per-request handle_one().
server = build_server()
params = {
"name": "add",
"arguments": {"a": 2, "b": 3},
"_meta": {
types.PROTOCOL_VERSION_META_KEY: LATEST_MODERN_VERSION,
types.CLIENT_INFO_META_KEY: {"name": "serve-one-probe", "version": "0.0.0"},
types.CLIENT_CAPABILITIES_META_KEY: {},
},
}
async with server.lifespan(server) as lifespan_state:
raw = await handle_one(server, "tools/call", params, lifespan_state=lifespan_state)
assert raw["structuredContent"] == {"result": 5}, raw
assert raw["content"][0] == {"type": "text", "text": "5"}, raw
# ── over the wire: the loop-mode driver behind the connected client.
async with Client(target, mode=mode) as client:
listed = await client.list_tools()
assert [t.name for t in listed.tools] == ["add"]
result = await client.call_tool("add", {"a": 2, "b": 3})
assert result.structured_content == {"result": 5}, result
if __name__ == "__main__":
run_client(main)