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67 lines
2.9 KiB
Python
67 lines
2.9 KiB
Python
"""`dispatch_input_request` and `validate_tool_result` are public `ClientSession` API."""
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import mcp_types as types
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import pytest
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from mcp_types import (
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CallToolResult,
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ErrorData,
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ListRootsResult,
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ListToolsResult,
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PaginatedRequestParams,
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Tool,
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)
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from mcp.client.client import Client
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from mcp.client.session import ClientRequestContext, ClientSession
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from mcp.server import Server, ServerRequestContext
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from mcp.shared.direct_dispatcher import create_direct_dispatcher_pair
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@pytest.mark.anyio
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async def test_dispatch_input_request_routes_through_the_callback_table() -> None:
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expected = ListRootsResult(roots=[])
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async def list_roots(context: ClientRequestContext) -> ListRootsResult:
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return expected
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client_side, _server_side = create_direct_dispatcher_pair()
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session = ClientSession(dispatcher=client_side, list_roots_callback=list_roots)
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ctx = ClientRequestContext(session=session, request_id="r-1")
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response = await session.dispatch_input_request(ctx, types.ListRootsRequest())
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assert response is expected
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@pytest.mark.anyio
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async def test_dispatch_input_request_returns_error_data_on_refusal() -> None:
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"""With no callback registered, refusal comes back as `ErrorData`, not a raise."""
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client_side, _server_side = create_direct_dispatcher_pair()
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session = ClientSession(dispatcher=client_side)
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ctx = ClientRequestContext(session=session, request_id="r-1")
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response = await session.dispatch_input_request(ctx, types.ListRootsRequest())
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assert isinstance(response, ErrorData)
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assert response.code == types.INVALID_REQUEST
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def _make_server(output_schema: dict[str, object]) -> Server:
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async def on_list_tools(ctx: ServerRequestContext, params: PaginatedRequestParams | None) -> ListToolsResult:
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return ListToolsResult(tools=[Tool(name="t", input_schema={"type": "object"}, output_schema=output_schema)])
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return Server("test-server", on_list_tools=on_list_tools)
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@pytest.mark.anyio
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async def test_validate_tool_result_passes_a_conforming_result() -> None:
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server = _make_server({"type": "object", "properties": {"x": {"type": "integer"}}, "required": ["x"]})
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async with Client(server) as client:
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# The session fetches the listing itself when the tool isn't cached yet.
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await client.session.validate_tool_result("t", CallToolResult(content=[], structured_content={"x": 1}))
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@pytest.mark.anyio
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async def test_validate_tool_result_raises_on_schema_mismatch() -> None:
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server = _make_server({"type": "object", "properties": {"x": {"type": "integer"}}, "required": ["x"]})
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async with Client(server) as client:
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# Stable SDK prefix only: the message tail is jsonschema text that shifts with the dependency.
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with pytest.raises(RuntimeError, match="Invalid structured content returned by tool t"):
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await client.session.validate_tool_result("t", CallToolResult(content=[], structured_content={"x": "no"}))
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