57 lines
2.1 KiB
Python
57 lines
2.1 KiB
Python
import pytest
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from pydantic import FileUrl
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from mcp.client.session import ClientSession
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from mcp.server.fastmcp import FastMCP
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from mcp.server.fastmcp.server import Context
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from mcp.server.session import ServerSession
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from mcp.shared.context import RequestContext
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from mcp.shared.memory import (
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create_connected_server_and_client_session as create_session,
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)
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from mcp.types import ListRootsResult, Root, TextContent
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@pytest.mark.anyio
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async def test_list_roots_callback():
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server = FastMCP("test")
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callback_return = ListRootsResult(
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roots=[
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Root(
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uri=FileUrl("file://users/fake/test"),
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name="Test Root 1",
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),
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Root(
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uri=FileUrl("file://users/fake/test/2"),
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name="Test Root 2",
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),
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]
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)
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async def list_roots_callback(
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context: RequestContext[ClientSession, None],
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) -> ListRootsResult:
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return callback_return
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@server.tool("test_list_roots")
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async def test_list_roots(context: Context[ServerSession, None], message: str):
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roots = await context.session.list_roots()
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assert roots == callback_return
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return True
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# Test with list_roots callback
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async with create_session(server._mcp_server, list_roots_callback=list_roots_callback) as client_session:
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# Make a request to trigger sampling callback
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result = await client_session.call_tool("test_list_roots", {"message": "test message"})
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assert result.is_error is False
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assert isinstance(result.content[0], TextContent)
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assert result.content[0].text == "true"
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# Test without list_roots callback
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async with create_session(server._mcp_server) as client_session:
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# Make a request to trigger sampling callback
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result = await client_session.call_tool("test_list_roots", {"message": "test message"})
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assert result.is_error is True
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assert isinstance(result.content[0], TextContent)
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assert result.content[0].text == "Error executing tool test_list_roots: List roots not supported"
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