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Continuo Memory System

by GtOkAi
test_552_windows_hang.py1.91 kB
"""Test for issue #552: stdio_client hangs on Windows.""" import sys from textwrap import dedent import anyio import pytest from mcp import ClientSession, StdioServerParameters from mcp.client.stdio import stdio_client @pytest.mark.skipif(sys.platform != "win32", reason="Windows-specific test") @pytest.mark.anyio async def test_windows_stdio_client_with_session(): """ Test the exact scenario from issue #552: Using ClientSession with stdio_client. This reproduces the original bug report where stdio_client hangs on Windows 11 when used with ClientSession. """ # Create a minimal MCP server that responds to initialization server_script = dedent( """ import json import sys # Read initialization request line = sys.stdin.readline() # Send initialization response response = { "jsonrpc": "2.0", "id": 1, "result": { "protocolVersion": "1.0", "capabilities": {}, "serverInfo": {"name": "test-server", "version": "1.0"} } } print(json.dumps(response)) sys.stdout.flush() # Exit after a short delay import time time.sleep(0.1) sys.exit(0) """ ).strip() params = StdioServerParameters( command=sys.executable, args=["-c", server_script], ) # This is the exact pattern from the bug report with anyio.fail_after(10): try: async with stdio_client(params) as (read, write): async with ClientSession(read, write) as session: await session.initialize() # Should exit ClientSession without hanging # Should exit stdio_client without hanging except Exception: # Connection errors are expected when process exits pass

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