612 lines
19 KiB
Python
612 lines
19 KiB
Python
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"""
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Comprehensive Integration Tests for MCP Client
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This module contains end-to-end integration tests for the MCP client,
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testing real server connections, tool calling, and AI provider integration.
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"""
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import pytest
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import asyncio
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import subprocess
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import time
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import signal
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import os
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import sys
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from typing import Optional, Dict, Any, List
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from unittest.mock import Mock, patch
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import httpx
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# Add src to path for imports
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sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..', '..', 'src'))
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from mcp_llm_client import MCPAIClient, TransportType
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from mcp_template.llm_client.client_factory import AIClientFactory
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class MCPServerProcess:
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"""Helper class to manage MCP server process for testing"""
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def __init__(self, transport: str = "sse", port: int = 8051):
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self.transport = transport
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self.port = port
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self.process: Optional[subprocess.Popen] = None
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self.url = f"http://localhost:{port}"
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async def start(self):
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"""Start the MCP server process"""
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cmd = [
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sys.executable,
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"run_mcp_server.py",
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"--transport", self.transport,
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"--port", str(self.port)
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]
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self.process = subprocess.Popen(
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cmd,
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cwd=os.path.join(os.path.dirname(__file__), '..', '..'),
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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text=True
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)
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# Wait for server to be ready
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await self._wait_for_server()
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return self
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async def _wait_for_server(self, timeout: int = 30):
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"""Wait for server to be ready"""
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start_time = time.time()
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while time.time() - start_time < timeout:
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try:
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async with httpx.AsyncClient() as client:
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if self.transport == "sse":
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response = await client.get(f"{self.url}/sse", timeout=5.0)
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if response.status_code == 200:
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return
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else:
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# For stdio, just wait a bit
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await asyncio.sleep(2)
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return
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except Exception:
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pass
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await asyncio.sleep(1)
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raise TimeoutError(f"Server did not start within {timeout} seconds")
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async def stop(self):
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"""Stop the MCP server process"""
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if self.process:
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try:
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self.process.terminate()
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self.process.wait(timeout=10)
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except subprocess.TimeoutExpired:
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self.process.kill()
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self.process.wait()
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@pytest.fixture
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async def sse_server():
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"""Fixture to start and stop SSE MCP server"""
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server = MCPServerProcess(transport="sse", port=8051)
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await server.start()
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yield server
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await server.stop()
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@pytest.fixture
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async def stdio_server():
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"""Fixture to start and stop STDIO MCP server"""
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server = MCPServerProcess(transport="stdio", port=8052)
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await server.start()
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yield server
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await server.stop()
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class TestMCPClientIntegration:
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"""Comprehensive integration tests for MCP client"""
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@pytest.mark.integration
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@pytest.mark.requires_api_key
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@pytest.mark.asyncio
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async def test_sse_transport_connection(self, sse_server):
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"""Test MCP client can connect to server using SSE transport"""
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# Skip if no OpenAI API key
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if not os.getenv("OPENAI_API_KEY"):
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pytest.skip("OpenAI API key not available")
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client = MCPAIClient(
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model="gpt-4o",
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transport=TransportType.SSE,
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provider="openai",
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temperature=0.1,
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max_tokens=100
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)
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try:
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# Test connection
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await client.connect(sse_server.url)
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# Test getting tools
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tools = await client.get_mcp_tools()
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assert isinstance(tools, list)
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assert len(tools) > 0
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# Verify tool structure
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for tool in tools:
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assert "name" in tool
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assert "description" in tool
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assert "inputSchema" in tool
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finally:
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await client.disconnect()
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@pytest.mark.integration
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@pytest.mark.requires_api_key
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@pytest.mark.asyncio
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async def test_stdio_transport_connection(self):
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"""Test MCP client can connect using STDIO transport"""
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# Skip if no OpenAI API key
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if not os.getenv("OPENAI_API_KEY"):
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pytest.skip("OpenAI API key not available")
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client = MCPAIClient(
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model="gpt-4o",
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transport=TransportType.STDIO,
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provider="openai",
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temperature=0.1,
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max_tokens=100
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)
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try:
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# For STDIO, we need to provide server command
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await client.connect_stdio(
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server_command=[sys.executable, "run_mcp_server.py", "--transport", "stdio"]
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)
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# Test getting tools
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tools = await client.get_mcp_tools()
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assert isinstance(tools, list)
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assert len(tools) > 0
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finally:
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await client.disconnect()
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@pytest.mark.integration
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@pytest.mark.requires_api_key
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@pytest.mark.slow
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@pytest.mark.asyncio
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async def test_end_to_end_tool_calling_sse(self, sse_server):
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"""Test complete end-to-end tool calling with SSE transport"""
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if not os.getenv("OPENAI_API_KEY"):
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pytest.skip("OpenAI API key not available")
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client = MCPAIClient(
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model="gpt-4o",
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transport=TransportType.SSE,
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provider="openai",
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temperature=0.1,
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max_tokens=200
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)
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try:
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await client.connect(sse_server.url)
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# Test a simple mathematical query that should trigger tool calls
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query = "Calculate 15 + 27 and then multiply the result by 2"
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response = await client.process_query(query)
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assert isinstance(response, str)
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assert len(response) > 0
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# The response should contain the calculation result
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# We can't predict exact wording but should contain numbers
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assert any(char.isdigit() for char in response)
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finally:
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await client.disconnect()
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@pytest.mark.integration
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@pytest.mark.requires_api_key
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@pytest.mark.asyncio
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async def test_multiple_provider_support(self, sse_server):
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"""Test MCP client works with different AI providers"""
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if not os.getenv("OPENAI_API_KEY"):
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pytest.skip("OpenAI API key not available")
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providers_to_test = ["openai"]
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for provider in providers_to_test:
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client = MCPAIClient(
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model="gpt-4o" if provider == "openai" else "claude-3-opus-20240229",
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transport=TransportType.SSE,
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provider=provider,
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temperature=0.1,
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max_tokens=100
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)
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try:
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await client.connect(sse_server.url)
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# Test basic tool listing
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tools = await client.get_mcp_tools()
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assert len(tools) > 0
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# Test simple query
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response = await client.process_query("What tools are available?")
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assert isinstance(response, str)
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finally:
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await client.disconnect()
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@pytest.mark.integration
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@pytest.mark.asyncio
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async def test_error_handling_connection_failure(self):
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"""Test error handling when server connection fails"""
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client = MCPAIClient(
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model="gpt-4o",
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transport=TransportType.SSE,
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provider="openai"
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)
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# Try to connect to non-existent server
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with pytest.raises(Exception):
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await client.connect("http://localhost:9999")
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@pytest.mark.integration
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@pytest.mark.requires_api_key
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@pytest.mark.asyncio
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async def test_error_handling_invalid_query(self, sse_server):
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"""Test error handling with invalid queries"""
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if not os.getenv("OPENAI_API_KEY"):
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pytest.skip("OpenAI API key not available")
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client = MCPAIClient(
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model="gpt-4o",
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transport=TransportType.SSE,
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provider="openai",
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temperature=0.1
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)
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try:
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await client.connect(sse_server.url)
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# Test with empty query
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response = await client.process_query("")
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assert isinstance(response, str)
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# Test with very long query
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long_query = "test " * 1000
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response = await client.process_query(long_query)
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assert isinstance(response, str)
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finally:
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await client.disconnect()
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@pytest.mark.integration
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@pytest.mark.requires_api_key
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@pytest.mark.asyncio
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async def test_interactive_session_mode(self, sse_server):
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"""Test interactive session functionality"""
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if not os.getenv("OPENAI_API_KEY"):
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pytest.skip("OpenAI API key not available")
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client = MCPAIClient(
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model="gpt-4o",
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transport=TransportType.SSE,
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provider="openai",
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temperature=0.1,
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max_tokens=100
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)
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try:
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await client.connect(sse_server.url)
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# Mock user inputs for interactive session
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inputs = ["Calculate 5 + 3", "quit"]
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with patch('builtins.input', side_effect=inputs):
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# This would normally run an interactive loop
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# For testing, we'll just verify the client is ready
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assert client.session is not None
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assert client.ai_client is not None
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finally:
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await client.disconnect()
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@pytest.mark.integration
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@pytest.mark.requires_api_key
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@pytest.mark.asyncio
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async def test_tool_schema_validation(self, sse_server):
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"""Test that tool schemas are properly formatted for AI providers"""
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if not os.getenv("OPENAI_API_KEY"):
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pytest.skip("OpenAI API key not available")
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client = MCPAIClient(
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model="gpt-4o",
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transport=TransportType.SSE,
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provider="openai"
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)
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try:
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await client.connect(sse_server.url)
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tools = await client.get_mcp_tools()
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# Verify OpenAI-specific tool formatting
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for tool in tools:
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assert "type" in tool
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assert tool["type"] == "function"
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assert "function" in tool
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assert "name" in tool["function"]
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assert "description" in tool["function"]
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assert "parameters" in tool["function"]
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finally:
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await client.disconnect()
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@pytest.mark.integration
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@pytest.mark.requires_api_key
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@pytest.mark.slow
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@pytest.mark.asyncio
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async def test_concurrent_connections(self, sse_server):
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"""Test multiple clients can connect simultaneously"""
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if not os.getenv("OPENAI_API_KEY"):
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pytest.skip("OpenAI API key not available")
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async def create_and_test_client(client_id: int):
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client = MCPAIClient(
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model="gpt-4o",
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transport=TransportType.SSE,
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provider="openai",
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temperature=0.1
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)
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try:
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await client.connect(sse_server.url)
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tools = await client.get_mcp_tools()
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return len(tools)
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finally:
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await client.disconnect()
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# Test 3 concurrent connections
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tasks = [create_and_test_client(i) for i in range(3)]
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results = await asyncio.gather(*tasks)
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# All should succeed and return same number of tools
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assert all(r > 0 for r in results)
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assert len(set(results)) == 1 # All should return same count
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@pytest.mark.integration
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@pytest.mark.asyncio
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async def test_configuration_parameters(self):
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"""Test various configuration parameters work correctly"""
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# Test different temperature settings
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for temp in [0.1, 0.5, 0.9]:
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client = MCPAIClient(
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model="gpt-4o",
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transport=TransportType.SSE,
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provider="openai",
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temperature=temp,
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max_tokens=100
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)
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assert client.temperature == temp
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assert client.ai_client.temperature == temp
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@pytest.mark.integration
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@pytest.mark.requires_api_key
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||
|
|
@pytest.mark.asyncio
|
||
|
|
async def test_resource_access(self, sse_server):
|
||
|
|
"""Test accessing MCP resources"""
|
||
|
|
if not os.getenv("OPENAI_API_KEY"):
|
||
|
|
pytest.skip("OpenAI API key not available")
|
||
|
|
|
||
|
|
client = MCPAIClient(
|
||
|
|
model="gpt-4o",
|
||
|
|
transport=TransportType.SSE,
|
||
|
|
provider="openai"
|
||
|
|
)
|
||
|
|
|
||
|
|
try:
|
||
|
|
await client.connect(sse_server.url)
|
||
|
|
|
||
|
|
# Test listing resources
|
||
|
|
resources = await client.session.list_resources()
|
||
|
|
assert isinstance(resources.resources, list)
|
||
|
|
|
||
|
|
# Test reading resources if any exist
|
||
|
|
if resources.resources:
|
||
|
|
for resource in resources.resources[:2]: # Test first 2 resources
|
||
|
|
content = await client.session.read_resource(resource.uri)
|
||
|
|
assert content is not None
|
||
|
|
|
||
|
|
finally:
|
||
|
|
await client.disconnect()
|
||
|
|
|
||
|
|
@pytest.mark.integration
|
||
|
|
@pytest.mark.requires_api_key
|
||
|
|
@pytest.mark.asyncio
|
||
|
|
async def test_prompt_access(self, sse_server):
|
||
|
|
"""Test accessing MCP prompts"""
|
||
|
|
if not os.getenv("OPENAI_API_KEY"):
|
||
|
|
pytest.skip("OpenAI API key not available")
|
||
|
|
|
||
|
|
client = MCPAIClient(
|
||
|
|
model="gpt-4o",
|
||
|
|
transport=TransportType.SSE,
|
||
|
|
provider="openai"
|
||
|
|
)
|
||
|
|
|
||
|
|
try:
|
||
|
|
await client.connect(sse_server.url)
|
||
|
|
|
||
|
|
# Test listing prompts
|
||
|
|
prompts = await client.session.list_prompts()
|
||
|
|
assert isinstance(prompts.prompts, list)
|
||
|
|
|
||
|
|
# Test getting prompts if any exist
|
||
|
|
if prompts.prompts:
|
||
|
|
for prompt in prompts.prompts[:2]: # Test first 2 prompts
|
||
|
|
prompt_content = await client.session.get_prompt(prompt.name)
|
||
|
|
assert prompt_content is not None
|
||
|
|
|
||
|
|
finally:
|
||
|
|
await client.disconnect()
|
||
|
|
|
||
|
|
|
||
|
|
class TestMCPClientUtilities:
|
||
|
|
"""Test utility functions and edge cases"""
|
||
|
|
|
||
|
|
@pytest.mark.unit
|
||
|
|
def test_transport_type_enum(self):
|
||
|
|
"""Test TransportType enum values"""
|
||
|
|
assert TransportType.SSE.value == "sse"
|
||
|
|
assert TransportType.STDIO.value == "stdio"
|
||
|
|
|
||
|
|
@pytest.mark.unit
|
||
|
|
def test_client_initialization_validation(self):
|
||
|
|
"""Test client initialization with various parameters"""
|
||
|
|
# Test with minimal parameters
|
||
|
|
client = MCPAIClient()
|
||
|
|
assert client.model == "gpt-4o"
|
||
|
|
assert client.provider == "openai"
|
||
|
|
assert client.transport == TransportType.SSE
|
||
|
|
|
||
|
|
# Test with custom parameters
|
||
|
|
client = MCPAIClient(
|
||
|
|
model="gpt-4o-mini",
|
||
|
|
provider="openai",
|
||
|
|
transport=TransportType.STDIO,
|
||
|
|
temperature=0.5,
|
||
|
|
max_tokens=500,
|
||
|
|
top_p=0.9
|
||
|
|
)
|
||
|
|
|
||
|
|
assert client.model == "gpt-4o-mini"
|
||
|
|
assert client.provider == "openai"
|
||
|
|
assert client.transport == TransportType.STDIO
|
||
|
|
assert client.temperature == 0.5
|
||
|
|
assert client.max_tokens == 500
|
||
|
|
|
||
|
|
@pytest.mark.unit
|
||
|
|
@patch.dict(os.environ, {"OPENAI_API_KEY": "test-key"})
|
||
|
|
def test_ai_client_factory_integration(self):
|
||
|
|
"""Test that AI client factory creates correct client types"""
|
||
|
|
# Test OpenAI client creation
|
||
|
|
openai_client = AIClientFactory.create_client(
|
||
|
|
provider="openai",
|
||
|
|
model_name="gpt-4o",
|
||
|
|
temperature=0.5
|
||
|
|
)
|
||
|
|
|
||
|
|
assert openai_client is not None
|
||
|
|
assert hasattr(openai_client, 'chat_completion')
|
||
|
|
assert hasattr(openai_client, '_format_tools_for_provider')
|
||
|
|
|
||
|
|
@pytest.mark.unit
|
||
|
|
def test_missing_llm_client_handling(self):
|
||
|
|
"""Test behavior when LLM client is not available"""
|
||
|
|
with patch('mcp_llm_client.LLM_CLIENT_AVAILABLE', False):
|
||
|
|
with pytest.raises(ImportError, match="LLM client not available"):
|
||
|
|
MCPAIClient()
|
||
|
|
|
||
|
|
|
||
|
|
class TestPerformanceAndLoad:
|
||
|
|
"""Performance and load testing for MCP client"""
|
||
|
|
|
||
|
|
@pytest.mark.integration
|
||
|
|
@pytest.mark.requires_api_key
|
||
|
|
@pytest.mark.slow
|
||
|
|
@pytest.mark.asyncio
|
||
|
|
async def test_multiple_rapid_queries(self, sse_server):
|
||
|
|
"""Test handling multiple rapid queries"""
|
||
|
|
if not os.getenv("OPENAI_API_KEY"):
|
||
|
|
pytest.skip("OpenAI API key not available")
|
||
|
|
|
||
|
|
client = MCPAIClient(
|
||
|
|
model="gpt-4o",
|
||
|
|
transport=TransportType.SSE,
|
||
|
|
provider="openai",
|
||
|
|
temperature=0.1,
|
||
|
|
max_tokens=50
|
||
|
|
)
|
||
|
|
|
||
|
|
try:
|
||
|
|
await client.connect(sse_server.url)
|
||
|
|
|
||
|
|
queries = [
|
||
|
|
"What is 2 + 2?",
|
||
|
|
"Calculate 10 * 5",
|
||
|
|
"What tools do you have?",
|
||
|
|
"Test query 4"
|
||
|
|
]
|
||
|
|
|
||
|
|
# Execute queries concurrently
|
||
|
|
tasks = [client.process_query(query) for query in queries]
|
||
|
|
responses = await asyncio.gather(*tasks)
|
||
|
|
|
||
|
|
# Verify all responses
|
||
|
|
assert len(responses) == len(queries)
|
||
|
|
assert all(isinstance(r, str) for r in responses)
|
||
|
|
assert all(len(r) > 0 for r in responses)
|
||
|
|
|
||
|
|
finally:
|
||
|
|
await client.disconnect()
|
||
|
|
|
||
|
|
@pytest.mark.integration
|
||
|
|
@pytest.mark.requires_api_key
|
||
|
|
@pytest.mark.asyncio
|
||
|
|
async def test_connection_reuse(self, sse_server):
|
||
|
|
"""Test reusing connection for multiple operations"""
|
||
|
|
if not os.getenv("OPENAI_API_KEY"):
|
||
|
|
pytest.skip("OpenAI API key not available")
|
||
|
|
|
||
|
|
client = MCPAIClient(
|
||
|
|
model="gpt-4o",
|
||
|
|
transport=TransportType.SSE,
|
||
|
|
provider="openai",
|
||
|
|
temperature=0.1
|
||
|
|
)
|
||
|
|
|
||
|
|
try:
|
||
|
|
await client.connect(sse_server.url)
|
||
|
|
|
||
|
|
# Perform multiple operations on same connection
|
||
|
|
for i in range(5):
|
||
|
|
tools = await client.get_mcp_tools()
|
||
|
|
assert len(tools) > 0
|
||
|
|
|
||
|
|
response = await client.process_query(f"Test query {i}")
|
||
|
|
assert isinstance(response, str)
|
||
|
|
|
||
|
|
finally:
|
||
|
|
await client.disconnect()
|
||
|
|
|
||
|
|
|
||
|
|
# Cleanup fixture to ensure no processes are left running
|
||
|
|
@pytest.fixture(scope="session", autouse=True)
|
||
|
|
async def cleanup_processes():
|
||
|
|
"""Clean up any remaining MCP server processes"""
|
||
|
|
yield
|
||
|
|
|
||
|
|
# Kill any remaining MCP server processes
|
||
|
|
try:
|
||
|
|
# Find and kill any remaining server processes
|
||
|
|
result = subprocess.run(
|
||
|
|
["pgrep", "-f", "run_mcp_server.py"],
|
||
|
|
capture_output=True,
|
||
|
|
text=True
|
||
|
|
)
|
||
|
|
|
||
|
|
if result.returncode == 0:
|
||
|
|
pids = result.stdout.strip().split('\n')
|
||
|
|
for pid in pids:
|
||
|
|
if pid:
|
||
|
|
try:
|
||
|
|
os.kill(int(pid), signal.SIGTERM)
|
||
|
|
except (ProcessLookupError, OSError):
|
||
|
|
pass # Process already dead
|
||
|
|
|
||
|
|
except (subprocess.SubprocessError, FileNotFoundError):
|
||
|
|
pass # pgrep not available or no processes found
|