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https://github.com/PrefectHQ/fastmcp.git
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392 lines
13 KiB
Python
392 lines
13 KiB
Python
"""Tests for the inspect.py module."""
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import importlib.metadata
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from mcp.server.fastmcp import FastMCP as FastMCP1x
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import fastmcp
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from fastmcp import Client, FastMCP
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from fastmcp.utilities.inspect import (
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FastMCPInfo,
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ToolInfo,
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inspect_fastmcp,
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inspect_fastmcp_v1,
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)
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class TestFastMCPInfo:
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"""Tests for the FastMCPInfo dataclass."""
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def test_fastmcp_info_creation(self):
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"""Test that FastMCPInfo can be created with all required fields."""
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tool = ToolInfo(
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key="tool1", name="tool1", description="Test tool", input_schema={}
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)
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info = FastMCPInfo(
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name="TestServer",
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instructions="Test instructions",
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fastmcp_version="1.0.0",
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mcp_version="1.0.0",
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server_version="1.0.0",
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tools=[tool],
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prompts=[],
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resources=[],
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templates=[],
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capabilities={"tools": {"listChanged": True}},
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)
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assert info.name == "TestServer"
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assert info.instructions == "Test instructions"
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assert info.fastmcp_version == "1.0.0"
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assert info.mcp_version == "1.0.0"
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assert info.server_version == "1.0.0"
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assert len(info.tools) == 1
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assert info.tools[0].name == "tool1"
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assert info.capabilities == {"tools": {"listChanged": True}}
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def test_fastmcp_info_with_none_instructions(self):
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"""Test that FastMCPInfo works with None instructions."""
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info = FastMCPInfo(
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name="TestServer",
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instructions=None,
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fastmcp_version="1.0.0",
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mcp_version="1.0.0",
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server_version="1.0.0",
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tools=[],
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prompts=[],
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resources=[],
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templates=[],
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capabilities={},
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)
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assert info.instructions is None
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class TestGetFastMCPInfo:
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"""Tests for the get_fastmcp_info function."""
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async def test_empty_server(self):
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"""Test get_fastmcp_info with an empty server."""
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mcp = FastMCP("EmptyServer")
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info = await inspect_fastmcp(mcp)
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assert info.name == "EmptyServer"
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assert info.instructions is None
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assert info.fastmcp_version == fastmcp.__version__
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assert info.mcp_version == importlib.metadata.version("mcp")
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assert info.server_version is None
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assert info.tools == []
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assert info.prompts == []
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assert info.resources == []
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assert info.templates == []
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assert "tools" in info.capabilities
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assert "resources" in info.capabilities
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assert "prompts" in info.capabilities
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assert "logging" in info.capabilities
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async def test_server_with_instructions(self):
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"""Test get_fastmcp_info with a server that has instructions."""
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mcp = FastMCP("InstructionsServer", instructions="Test instructions")
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info = await inspect_fastmcp(mcp)
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assert info.instructions == "Test instructions"
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async def test_server_with_version(self):
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"""Test get_fastmcp_info with a server that has a version."""
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mcp = FastMCP("VersionServer", version="1.2.3")
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info = await inspect_fastmcp(mcp)
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assert info.server_version == "1.2.3"
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async def test_server_with_tools(self):
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"""Test get_fastmcp_info with a server that has tools."""
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mcp = FastMCP("ToolServer")
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@mcp.tool
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def add_numbers(a: int, b: int) -> int:
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return a + b
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@mcp.tool
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def greet(name: str) -> str:
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return f"Hello, {name}!"
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info = await inspect_fastmcp(mcp)
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assert info.name == "ToolServer"
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assert len(info.tools) == 2
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tool_names = [tool.name for tool in info.tools]
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assert "add_numbers" in tool_names
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assert "greet" in tool_names
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async def test_server_with_resources(self):
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"""Test get_fastmcp_info with a server that has resources."""
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mcp = FastMCP("ResourceServer")
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@mcp.resource("resource://static")
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def get_static_data() -> str:
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return "Static data"
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@mcp.resource("resource://dynamic/{param}")
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def get_dynamic_data(param: str) -> str:
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return f"Dynamic data: {param}"
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info = await inspect_fastmcp(mcp)
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assert info.name == "ResourceServer"
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assert len(info.resources) == 1 # Static resource
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assert len(info.templates) == 1 # Dynamic resource becomes template
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resource_uris = [res.uri for res in info.resources]
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template_uris = [tmpl.uri_template for tmpl in info.templates]
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assert "resource://static" in resource_uris
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assert "resource://dynamic/{param}" in template_uris
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async def test_server_with_prompts(self):
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"""Test get_fastmcp_info with a server that has prompts."""
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mcp = FastMCP("PromptServer")
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@mcp.prompt
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def analyze_data(data: str) -> list:
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return [{"role": "user", "content": f"Analyze: {data}"}]
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@mcp.prompt("custom_prompt")
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def custom_analysis(text: str) -> list:
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return [{"role": "user", "content": f"Custom: {text}"}]
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info = await inspect_fastmcp(mcp)
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assert info.name == "PromptServer"
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assert len(info.prompts) == 2
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prompt_names = [prompt.name for prompt in info.prompts]
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assert "analyze_data" in prompt_names
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assert "custom_prompt" in prompt_names
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async def test_comprehensive_server(self):
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"""Test get_fastmcp_info with a server that has all component types."""
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mcp = FastMCP("ComprehensiveServer", instructions="A server with everything")
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# Add a tool
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@mcp.tool
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def calculate(x: int, y: int) -> int:
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return x * y
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# Add a resource
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@mcp.resource("resource://data")
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def get_data() -> str:
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return "Some data"
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# Add a template
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@mcp.resource("resource://item/{id}")
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def get_item(id: str) -> str:
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return f"Item {id}"
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# Add a prompt
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@mcp.prompt
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def analyze(content: str) -> list:
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return [{"role": "user", "content": content}]
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info = await inspect_fastmcp(mcp)
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assert info.name == "ComprehensiveServer"
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assert info.instructions == "A server with everything"
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assert info.fastmcp_version == fastmcp.__version__
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# Check all components are present
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assert len(info.tools) == 1
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tool_names = [tool.name for tool in info.tools]
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assert "calculate" in tool_names
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assert len(info.resources) == 1
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resource_uris = [res.uri for res in info.resources]
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assert "resource://data" in resource_uris
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assert len(info.templates) == 1
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template_uris = [tmpl.uri_template for tmpl in info.templates]
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assert "resource://item/{id}" in template_uris
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assert len(info.prompts) == 1
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prompt_names = [prompt.name for prompt in info.prompts]
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assert "analyze" in prompt_names
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# Check capabilities
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assert "tools" in info.capabilities
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assert "resources" in info.capabilities
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assert "prompts" in info.capabilities
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assert "logging" in info.capabilities
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async def test_server_no_instructions(self):
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"""Test get_fastmcp_info with a server that has no instructions."""
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mcp = FastMCP("NoInstructionsServer")
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info = await inspect_fastmcp(mcp)
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assert info.name == "NoInstructionsServer"
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assert info.instructions is None
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async def test_server_with_client_integration(self):
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"""Test that the extracted info matches what a client would see."""
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mcp = FastMCP("IntegrationServer")
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@mcp.tool
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def test_tool() -> str:
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return "test"
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@mcp.resource("resource://test")
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def test_resource() -> str:
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return "test resource"
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@mcp.prompt
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def test_prompt() -> list:
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return [{"role": "user", "content": "test"}]
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# Get info using our function
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info = await inspect_fastmcp(mcp)
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# Verify using client
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async with Client(mcp) as client:
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tools = await client.list_tools()
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resources = await client.list_resources()
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prompts = await client.list_prompts()
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assert len(info.tools) == len(tools)
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assert len(info.resources) == len(resources)
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assert len(info.prompts) == len(prompts)
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assert info.tools[0].name == tools[0].name
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assert info.resources[0].uri == str(resources[0].uri)
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assert info.prompts[0].name == prompts[0].name
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class TestFastMCP1xCompatibility:
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"""Tests for FastMCP 1.x compatibility."""
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async def test_fastmcp1x_empty_server(self):
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"""Test get_fastmcp_info_v1 with an empty FastMCP1x server."""
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mcp = FastMCP1x("Test1x")
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info = await inspect_fastmcp_v1(mcp)
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assert info.name == "Test1x"
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assert info.instructions is None
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assert info.fastmcp_version == importlib.metadata.version("mcp")
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assert info.mcp_version == importlib.metadata.version("mcp")
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assert info.server_version is None
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assert info.tools == []
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assert info.prompts == []
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assert info.resources == []
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assert info.templates == [] # No templates added in this test
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assert "tools" in info.capabilities
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async def test_fastmcp1x_with_tools(self):
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"""Test get_fastmcp_info_v1 with a FastMCP1x server that has tools."""
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mcp = FastMCP1x("Test1x")
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@mcp.tool()
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def add_numbers(a: int, b: int) -> int:
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return a + b
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@mcp.tool()
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def greet(name: str) -> str:
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return f"Hello, {name}!"
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info = await inspect_fastmcp_v1(mcp)
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assert info.name == "Test1x"
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assert len(info.tools) == 2
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tool_names = [tool.name for tool in info.tools]
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assert "add_numbers" in tool_names
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assert "greet" in tool_names
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async def test_fastmcp1x_with_resources(self):
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"""Test get_fastmcp_info_v1 with a FastMCP1x server that has resources."""
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mcp = FastMCP1x("Test1x")
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@mcp.resource("resource://data")
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def get_data() -> str:
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return "Some data"
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info = await inspect_fastmcp_v1(mcp)
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assert info.name == "Test1x"
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assert len(info.resources) == 1
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resource_uris = [res.uri for res in info.resources]
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assert "resource://data" in resource_uris
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assert len(info.templates) == 0 # No templates added in this test
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async def test_fastmcp1x_with_prompts(self):
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"""Test get_fastmcp_info_v1 with a FastMCP1x server that has prompts."""
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mcp = FastMCP1x("Test1x")
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@mcp.prompt("analyze")
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def analyze_data(data: str) -> list:
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return [{"role": "user", "content": f"Analyze: {data}"}]
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info = await inspect_fastmcp_v1(mcp)
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assert info.name == "Test1x"
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assert len(info.prompts) == 1
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prompt_names = [prompt.name for prompt in info.prompts]
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assert "analyze" in prompt_names
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async def test_dispatcher_with_fastmcp1x(self):
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"""Test that the main get_fastmcp_info function correctly dispatches to v1."""
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mcp = FastMCP1x("Test1x")
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@mcp.tool()
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def test_tool() -> str:
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return "test"
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info = await inspect_fastmcp(mcp)
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assert info.name == "Test1x"
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assert len(info.tools) == 1
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tool_names = [tool.name for tool in info.tools]
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assert "test_tool" in tool_names
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assert len(info.templates) == 0 # No templates added in this test
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async def test_dispatcher_with_fastmcp2x(self):
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"""Test that the main get_fastmcp_info function correctly dispatches to v2."""
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mcp = FastMCP("Test2x")
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@mcp.tool
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def test_tool() -> str:
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return "test"
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info = await inspect_fastmcp(mcp)
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assert info.name == "Test2x"
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assert len(info.tools) == 1
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tool_names = [tool.name for tool in info.tools]
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assert "test_tool" in tool_names
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async def test_fastmcp1x_vs_fastmcp2x_comparison(self):
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"""Test that both versions can be inspected and compared."""
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mcp1x = FastMCP1x("Test1x")
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mcp2x = FastMCP("Test2x")
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@mcp1x.tool()
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def tool1x() -> str:
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return "1x"
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@mcp2x.tool
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def tool2x() -> str:
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return "2x"
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info1x = await inspect_fastmcp(mcp1x)
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info2x = await inspect_fastmcp(mcp2x)
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assert info1x.name == "Test1x"
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assert info2x.name == "Test2x"
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assert len(info1x.tools) == 1
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assert len(info2x.tools) == 1
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tool1x_names = [tool.name for tool in info1x.tools]
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tool2x_names = [tool.name for tool in info2x.tools]
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assert "tool1x" in tool1x_names
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assert "tool2x" in tool2x_names
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# Check server versions
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assert info1x.server_version is None
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assert info2x.server_version is None
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# No templates added in these tests
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assert len(info1x.templates) == 0
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assert len(info2x.templates) == 0
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