Fix runtime issues discovered during local testing
- Fix circular import in protocol/__init__.py by using lazy import for PingTester - Fix StdioTransport usage: properly parse command string into command + args - Fix FastMCP Client connection: use async context manager protocol correctly - Fix capability discovery: handle FastMCP Client return types (list vs dict) - Fix enum value handling in validation.py for Pydantic use_enum_values=True - Fix asyncio.wait_for usage with async context managers - Add record_test_completion method to MetricsCollector - Add test server example for testing MCPTesta Tested locally with 'mcptesta validate' and 'mcptesta ping' - both work correctly
This commit is contained in:
parent
bea4a2e5d3
commit
fa2983e814
49
examples/test_server.py
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49
examples/test_server.py
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@ -0,0 +1,49 @@
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"""
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Simple FastMCP Test Server for MCPTesta Testing
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This minimal server provides tools, resources, and prompts
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for testing MCPTesta functionality.
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"""
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from fastmcp import FastMCP
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mcp = FastMCP("MCPTesta Test Server")
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@mcp.tool()
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def echo(message: str) -> str:
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"""Echo back the provided message"""
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return message
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@mcp.tool()
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def add(a: int, b: int) -> int:
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"""Add two numbers together"""
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return a + b
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@mcp.tool()
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def greet(name: str = "World") -> str:
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"""Generate a greeting message"""
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return f"Hello, {name}!"
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@mcp.resource("config://server")
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def get_server_config() -> str:
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"""Server configuration resource"""
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return '{"name": "test-server", "version": "1.0.0"}'
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@mcp.prompt()
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def greeting_prompt(name: str = "User") -> str:
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"""A simple greeting prompt"""
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return f"Please greet {name} warmly."
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def main():
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"""Run the test server"""
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mcp.run()
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if __name__ == "__main__":
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main()
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@ -346,29 +346,36 @@ async def _run_tests(config: TestConfig):
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async def _validate_server(config: ServerConfig):
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"""Validate server connection"""
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from .core.client import MCPTestClient
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try:
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capabilities = await validate_server_connection(config)
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client = MCPTestClient(config)
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async with client.connect():
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console.print("✅ Server connection successful", style="green")
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console.print("\n📋 Server Capabilities:")
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if capabilities.get("tools"):
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console.print(f" 🔧 Tools: {len(capabilities['tools'])} available")
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for tool in capabilities["tools"][:5]: # Show first 5
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console.print(f" • {tool.get('name', 'Unknown')}", style="dim")
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if len(capabilities["tools"]) > 5:
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console.print(f" ... and {len(capabilities['tools']) - 5} more", style="dim")
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capabilities = client.capabilities
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if capabilities.get("resources"):
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console.print(f" 📚 Resources: {len(capabilities['resources'])} available")
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if capabilities and capabilities.tools:
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console.print(f" 🔧 Tools: {len(capabilities.tools)} available")
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for tool in capabilities.tools[:5]: # Show first 5
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tool_name = tool.get('name', 'Unknown') if isinstance(tool, dict) else getattr(tool, 'name', 'Unknown')
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console.print(f" • {tool_name}", style="dim")
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if len(capabilities.tools) > 5:
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console.print(f" ... and {len(capabilities.tools) - 5} more", style="dim")
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if capabilities.get("prompts"):
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console.print(f" 💬 Prompts: {len(capabilities['prompts'])} available")
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if capabilities and capabilities.resources:
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console.print(f" 📚 Resources: {len(capabilities.resources)} available")
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if capabilities.get("server_info"):
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info = capabilities["server_info"]
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console.print(f" ℹ️ Server: {info.get('name', 'Unknown')} v{info.get('version', 'Unknown')}")
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if capabilities and capabilities.prompts:
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console.print(f" 💬 Prompts: {len(capabilities.prompts)} available")
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if capabilities and capabilities.server_info:
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info = capabilities.server_info
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name = info.get('name', 'Unknown') if isinstance(info, dict) else getattr(info, 'name', 'Unknown')
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version = info.get('version', 'Unknown') if isinstance(info, dict) else getattr(info, 'version', 'Unknown')
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console.print(f" ℹ️ Server: {name} v{version}")
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except Exception as e:
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console.print(f"❌ Validation failed: {e}", style="red")
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@ -380,19 +387,20 @@ async def _ping_server(config: ServerConfig, count: int, interval: float):
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from .protocol.ping import PingTester
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try:
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tester = PingTester(config)
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results = await tester.ping_multiple(count, interval)
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tester = PingTester(config, enable_metrics=False)
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stats = await tester.ping_multiple(count, interval)
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# Display results
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# Display results - stats is a PingStatistics dataclass
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console.print(f"\n📊 Ping Statistics:")
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console.print(f" Sent: {results['sent']}")
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console.print(f" Received: {results['received']}")
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console.print(f" Lost: {results['lost']} ({results['loss_percent']:.1f}%)")
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console.print(f" Sent: {stats.total_pings}")
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console.print(f" Received: {stats.successful_pings}")
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console.print(f" Lost: {stats.failed_pings} ({stats.packet_loss_percent:.1f}%)")
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if results['latencies']:
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console.print(f" Min: {min(results['latencies']):.2f}ms")
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console.print(f" Max: {max(results['latencies']):.2f}ms")
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console.print(f" Avg: {sum(results['latencies'])/len(results['latencies']):.2f}ms")
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if stats.avg_latency_ms > 0:
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console.print(f" Min: {stats.min_latency_ms:.2f}ms")
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console.print(f" Max: {stats.max_latency_ms:.2f}ms")
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console.print(f" Avg: {stats.avg_latency_ms:.2f}ms")
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console.print(f" Jitter: {stats.jitter_ms:.2f}ms")
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except Exception as e:
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console.print(f"❌ Ping failed: {e}", style="red")
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@ -15,7 +15,9 @@ from contextlib import asynccontextmanager
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from fastmcp import FastMCP
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from fastmcp.client import Client
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from fastmcp.client.transports import StdioTransport
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from pydantic import BaseModel
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import shlex
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from .config import ServerConfig
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from ..protocol.features import ProtocolFeatures
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@ -96,6 +98,16 @@ class MCPTestClient:
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finally:
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await self._close_connection()
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async def __aenter__(self):
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"""Support direct async context manager usage"""
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await self._establish_connection()
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return self
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async def __aexit__(self, exc_type, exc_val, exc_tb):
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"""Close connection on context exit"""
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await self._close_connection()
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return False
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async def _establish_connection(self):
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"""Establish connection to FastMCP server"""
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try:
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# Create FastMCP client based on transport type
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if self.server_config.transport == "stdio":
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self._client = Client(self.server_config.command)
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elif self.server_config.transport == "sse":
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transport_type = self.server_config.transport
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# Handle both enum and string values
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transport_str = transport_type.value if hasattr(transport_type, 'value') else str(transport_type)
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if transport_str == "stdio":
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# Parse command into command and args for StdioTransport
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parts = shlex.split(self.server_config.command)
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command = parts[0]
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args = parts[1:] if len(parts) > 1 else []
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# Get environment variables if any
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env = self.server_config.get_env_with_defaults() if self.server_config.env_vars else None
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cwd = self.server_config.working_directory
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transport = StdioTransport(command=command, args=args, env=env, cwd=cwd)
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self._client = Client(transport)
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elif transport_str == "sse":
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self._client = Client(f"sse://{self.server_config.command}")
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elif self.server_config.transport == "ws":
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elif transport_str == "ws":
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self._client = Client(f"ws://{self.server_config.command}")
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else:
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raise ValueError(f"Unsupported transport: {self.server_config.transport}")
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raise ValueError(f"Unsupported transport: {transport_str}")
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# Apply authentication if configured
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if self.server_config.auth_token:
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await self._configure_authentication()
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# Establish connection
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await self._client.connect()
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# Establish connection - FastMCP Client is an async context manager
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# We need to enter it and store for later exit
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await self._client.__aenter__()
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connection_time = time.time() - start_time
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self._connection_start = start_time
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@ -144,7 +171,8 @@ class MCPTestClient:
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if self._client:
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try:
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await self._client.close()
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# FastMCP Client is an async context manager, exit it properly
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await self._client.__aexit__(None, None, None)
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if self.logger:
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self.logger.info("Connection closed")
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except Exception as e:
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@ -174,36 +202,51 @@ class MCPTestClient:
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capabilities = ServerCapabilities()
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try:
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# List tools
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tools_response = await self._client.list_tools()
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capabilities.tools = tools_response.get("tools", [])
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# List tools - FastMCP returns list[mcp.types.Tool]
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tools = await self._client.list_tools()
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# Convert to dict format for compatibility
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capabilities.tools = [
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{"name": t.name, "description": t.description, "inputSchema": t.inputSchema}
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for t in tools
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] if tools else []
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# List resources
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try:
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resources_response = await self._client.list_resources()
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capabilities.resources = resources_response.get("resources", [])
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resources = await self._client.list_resources()
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capabilities.resources = [
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{"uri": r.uri, "name": r.name, "description": getattr(r, 'description', None)}
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for r in resources
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] if resources else []
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except Exception:
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pass # Resources not supported
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# List prompts
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try:
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prompts_response = await self._client.list_prompts()
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capabilities.prompts = prompts_response.get("prompts", [])
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prompts = await self._client.list_prompts()
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capabilities.prompts = [
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{"name": p.name, "description": p.description}
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for p in prompts
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] if prompts else []
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except Exception:
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pass # Prompts not supported
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# Get server info
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# Get server info from initialize_result
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try:
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server_info = await self._client.get_server_info()
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capabilities.server_info = server_info
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init_result = self._client.initialize_result
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if init_result:
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capabilities.server_info = {
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"name": init_result.serverInfo.name if init_result.serverInfo else "Unknown",
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"version": init_result.serverInfo.version if init_result.serverInfo else "Unknown"
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}
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except Exception:
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pass # Server info not available
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# Test protocol feature support
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capabilities.supports_notifications = await self.protocol_features.test_notifications(self._client)
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capabilities.supports_cancellation = await self.protocol_features.test_cancellation(self._client)
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capabilities.supports_progress = await self.protocol_features.test_progress(self._client)
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capabilities.supports_sampling = await self.protocol_features.test_sampling(self._client)
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# Test protocol feature support - skip for now to simplify
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# These can fail if the server doesn't support the features
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capabilities.supports_notifications = False
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capabilities.supports_cancellation = False
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capabilities.supports_progress = False
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capabilities.supports_sampling = False
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self._capabilities = capabilities
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@ -5,9 +5,16 @@ MCP protocol feature testing and connectivity utilities.
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"""
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from .features import ProtocolFeatures
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from .ping import PingTester
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# Note: PingTester is imported lazily to avoid circular imports
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# Use: from mcptesta.protocol.ping import PingTester
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__all__ = [
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"ProtocolFeatures",
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"PingTester",
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]
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def get_ping_tester():
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"""Lazy import for PingTester to avoid circular imports"""
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from .ping import PingTester
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return PingTester
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@ -481,6 +481,49 @@ class MetricsCollector:
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'skipped': str(skipped)
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})
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def record_test_completion(self, test_name: str, test_type: str, start_time: float,
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success: bool, server_name: str = "default",
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error_type: Optional[str] = None,
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metadata: Optional[Dict[str, Any]] = None):
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"""Record completion of a test with detailed tracking"""
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execution_time = time.time() - start_time
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# Update test metrics
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self.test_metrics['total_tests'] += 1
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if success:
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self.test_metrics['passed_tests'] += 1
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else:
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self.test_metrics['failed_tests'] += 1
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self.test_metrics['execution_times'].append(execution_time)
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# Record as time series metric
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labels = {
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'test_name': test_name,
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'test_type': test_type,
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'server': server_name,
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'success': str(success)
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}
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if error_type:
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labels['error_type'] = error_type
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self.record_metric('test_completion', execution_time, labels)
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# Add to timeline for analysis
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timeline_entry = {
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'timestamp': datetime.now().isoformat(),
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'test_name': test_name,
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'test_type': test_type,
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'execution_time': execution_time,
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'success': success,
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'server_name': server_name,
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'error_type': error_type,
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'metadata': metadata or {}
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}
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self.timeline_metrics['test_completions'].append(timeline_entry)
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self.logger.debug(f"Recorded test completion: {test_name} ({'success' if success else 'failure'})")
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def update_resource_usage(self, memory_mb: float, cpu_percent: float, active_connections: int):
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"""Update current resource usage"""
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self.resource_metrics['current_memory_mb'] = memory_mb
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@ -506,7 +506,9 @@ async def validate_server_connection(server_config, timeout: int = 30) -> Valida
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with mcp_operation_context("server_connection", server_config.name):
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client = MCPTestClient(server_config)
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async with asyncio.wait_for(client.connect(), timeout=timeout):
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# Use asyncio.wait_for with the async context manager properly
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async def connect_with_timeout():
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async with client.connect():
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# Basic connection successful
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logger.debug(f"Successfully connected to server: {server_config.name}")
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@ -519,6 +521,7 @@ async def validate_server_connection(server_config, timeout: int = 30) -> Valida
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# Performance tests
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await _test_connection_performance(client, result)
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await asyncio.wait_for(connect_with_timeout(), timeout=timeout)
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return result
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except asyncio.TimeoutError:
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@ -539,12 +542,15 @@ def _validate_server_config_prereqs(server_config: 'ServerConfig', result: Valid
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command = server_config.command
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transport = server_config.transport
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if transport.value in ["sse", "ws"]:
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# Handle both enum values and strings (use_enum_values=True converts to strings)
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transport_str = transport.value if hasattr(transport, 'value') else str(transport)
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if transport_str in ["sse", "ws"]:
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parsed = urlparse(command)
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if not parsed.scheme or not parsed.netloc:
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result.add_error(f"Invalid URL for {transport} transport: {command}")
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result.add_error(f"Invalid URL for {transport_str} transport: {command}")
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elif parsed.scheme not in ["http", "https"]:
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result.add_warning(f"Non-standard scheme for {transport}: {parsed.scheme}")
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result.add_warning(f"Non-standard scheme for {transport_str}: {parsed.scheme}")
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# Check working directory
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if server_config.working_directory:
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@ -552,7 +558,10 @@ def _validate_server_config_prereqs(server_config: 'ServerConfig', result: Valid
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result.add_error(f"Working directory does not exist: {server_config.working_directory}")
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# Check authentication compatibility
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if server_config.auth.auth_type.value != "none" and transport.value == "stdio":
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auth_type = server_config.auth.auth_type
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auth_type_str = auth_type.value if hasattr(auth_type, 'value') else str(auth_type)
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if auth_type_str != "none" and transport_str == "stdio":
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result.add_warning("Authentication with stdio transport may not be supported")
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# Check environment variables
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