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112 lines
4.7 KiB
Python
112 lines
4.7 KiB
Python
import pytest
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from mcp_types import (
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InputRequiredResult,
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ListResourceTemplatesResult,
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TextResourceContents,
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)
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from mcp import Client
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from mcp.server.mcpserver import MCPServer
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from mcp.server.mcpserver.exceptions import ResourceError
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@pytest.mark.anyio
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async def test_resource_template_edge_cases():
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"""Test server-side resource template validation"""
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mcp = MCPServer("Demo")
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# Test case 1: Template with multiple parameters
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@mcp.resource("resource://users/{user_id}/posts/{post_id}")
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def get_user_post(user_id: str, post_id: str) -> str:
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return f"Post {post_id} by user {user_id}"
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# Test case 2: Template with optional parameter (should fail)
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with pytest.raises(ValueError, match="Mismatch between URI parameters"):
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@mcp.resource("resource://users/{user_id}/profile")
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def get_user_profile(user_id: str, optional_param: str | None = None) -> str: # pragma: no cover
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return f"Profile for user {user_id}"
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# Test case 3: Template with mismatched parameters
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with pytest.raises(ValueError, match="Mismatch between URI parameters"):
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@mcp.resource("resource://users/{user_id}/profile")
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def get_user_profile_mismatch(different_param: str) -> str: # pragma: no cover
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return f"Profile for user {different_param}"
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# Test case 4: Template with extra function parameters
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with pytest.raises(ValueError, match="Mismatch between URI parameters"):
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@mcp.resource("resource://users/{user_id}/profile")
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def get_user_profile_extra(user_id: str, extra_param: str) -> str: # pragma: no cover
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return f"Profile for user {user_id}"
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# Test case 5: Template with missing function parameters
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with pytest.raises(ValueError, match="Mismatch between URI parameters"):
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@mcp.resource("resource://users/{user_id}/profile/{section}")
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def get_user_profile_missing(user_id: str) -> str: # pragma: no cover
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return f"Profile for user {user_id}"
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# Verify valid template works
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result = await mcp.read_resource("resource://users/123/posts/456")
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assert not isinstance(result, InputRequiredResult)
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result_list = list(result)
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assert len(result_list) == 1
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assert result_list[0].content == "Post 456 by user 123"
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assert result_list[0].mime_type == "text/plain"
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# Verify invalid parameters raise error
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with pytest.raises(ResourceError, match="Unknown resource"):
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await mcp.read_resource("resource://users/123/posts") # Missing post_id
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with pytest.raises(ResourceError, match="Unknown resource"):
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await mcp.read_resource("resource://users/123/posts/456/extra") # Extra path component
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@pytest.mark.anyio
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async def test_resource_template_client_interaction():
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"""Test client-side resource template interaction"""
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mcp = MCPServer("Demo")
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# Register some templated resources
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@mcp.resource("resource://users/{user_id}/posts/{post_id}")
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def get_user_post(user_id: str, post_id: str) -> str:
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return f"Post {post_id} by user {user_id}"
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@mcp.resource("resource://users/{user_id}/profile")
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def get_user_profile(user_id: str) -> str:
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return f"Profile for user {user_id}"
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async with Client(mcp) as session:
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# List available resources
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resources = await session.list_resource_templates()
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assert isinstance(resources, ListResourceTemplatesResult)
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assert len(resources.resource_templates) == 2
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# Verify resource templates are listed correctly
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templates = [r.uri_template for r in resources.resource_templates]
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assert "resource://users/{user_id}/posts/{post_id}" in templates
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assert "resource://users/{user_id}/profile" in templates
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# Read a resource with valid parameters
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result = await session.read_resource("resource://users/123/posts/456")
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contents = result.contents[0]
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assert isinstance(contents, TextResourceContents)
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assert contents.text == "Post 456 by user 123"
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assert contents.mime_type == "text/plain"
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# Read another resource with valid parameters
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result = await session.read_resource("resource://users/789/profile")
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contents = result.contents[0]
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assert isinstance(contents, TextResourceContents)
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assert contents.text == "Profile for user 789"
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assert contents.mime_type == "text/plain"
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# Verify invalid resource URIs raise appropriate errors
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with pytest.raises(Exception): # Specific exception type may vary
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await session.read_resource("resource://users/123/posts") # Missing post_id
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with pytest.raises(Exception): # Specific exception type may vary
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await session.read_resource("resource://users/123/invalid") # Invalid template
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