Max
102 lines
3.7 KiB
Python
102 lines
3.7 KiB
Python
"""Tests for the server-side `Context`.
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`Context` extends `BaseContext` (forwarding to a `DispatchContext`) with
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`lifespan`, `connection`, and request-scoped `log`. End-to-end tested over
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`DirectDispatcher`.
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"""
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from collections.abc import Mapping
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from dataclasses import dataclass
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from typing import Any
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import anyio
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import pytest
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from mcp.server.connection import Connection
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from mcp.server.context import Context
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from mcp.shared.dispatcher import DispatchContext
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from mcp.shared.transport_context import TransportContext
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from ..shared.conftest import direct_pair
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from ..shared.test_dispatcher import Recorder, echo_handlers, running_pair
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DCtx = DispatchContext[TransportContext]
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@dataclass
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class _Lifespan:
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name: str
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@pytest.mark.anyio
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async def test_context_exposes_lifespan_and_connection_and_forwards_base_context():
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captured: list[Context[_Lifespan]] = []
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conn = Connection.__new__(Connection) # placeholder until running_pair gives us the dispatcher
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async def server_on_request(dctx: DCtx, method: str, params: Mapping[str, Any] | None) -> dict[str, Any]:
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ctx: Context[_Lifespan] = Context(dctx, lifespan=_Lifespan("app"), connection=conn)
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captured.append(ctx)
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return {}
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async with running_pair(direct_pair, server_on_request=server_on_request) as (client, server, *_):
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# Now we have the server dispatcher; build the real Connection bound to it.
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conn.__init__(server, has_standalone_channel=True, session_id="sess-1")
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with anyio.fail_after(5):
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await client.send_raw_request("t", None)
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ctx = captured[0]
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assert ctx.lifespan.name == "app"
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assert ctx.connection is conn
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assert ctx.transport.kind == "direct"
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assert ctx.can_send_request is True
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assert ctx.session_id == "sess-1"
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assert ctx.headers is None
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@pytest.mark.anyio
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async def test_context_log_sends_request_scoped_message_notification():
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crec = Recorder()
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_, c_notify = echo_handlers(crec)
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async def server_on_request(dctx: DCtx, method: str, params: Mapping[str, Any] | None) -> dict[str, Any]:
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ctx: Context[_Lifespan] = Context(
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dctx, lifespan=_Lifespan("app"), connection=Connection(dctx, has_standalone_channel=True)
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)
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await ctx.log("debug", "hello")
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return {}
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async with running_pair(direct_pair, server_on_request=server_on_request, client_on_notify=c_notify) as (
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client,
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*_,
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):
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with anyio.fail_after(5):
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await client.send_raw_request("t", None)
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await crec.notified.wait()
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method, params = crec.notifications[0]
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assert method == "notifications/message"
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assert params is not None and params["level"] == "debug" and params["data"] == "hello"
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@pytest.mark.anyio
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async def test_context_log_includes_logger_and_meta_when_supplied():
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crec = Recorder()
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_, c_notify = echo_handlers(crec)
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async def server_on_request(dctx: DCtx, method: str, params: Mapping[str, Any] | None) -> dict[str, Any]:
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ctx: Context[_Lifespan] = Context(
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dctx, lifespan=_Lifespan("app"), connection=Connection(dctx, has_standalone_channel=True)
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)
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await ctx.log("info", "x", logger="my.log", meta={"traceId": "t"})
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return {}
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async with running_pair(direct_pair, server_on_request=server_on_request, client_on_notify=c_notify) as (
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client,
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*_,
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):
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with anyio.fail_after(5):
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await client.send_raw_request("t", None)
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await crec.notified.wait()
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_, params = crec.notifications[0]
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assert params is not None
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assert params["logger"] == "my.log"
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assert params["_meta"] == {"traceId": "t"}
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