Ryan Malloy
0748eec48d
- Use app.run_stdio_async() instead of deprecated stdio_server import - Aligns with FastMCP 2.11.3 API - Server now starts correctly with uv run mcp-office-tools - Maintains all MCPMixin functionality and tool registration
370 lines
14 KiB
Python
370 lines
14 KiB
Python
"""Comprehensive testing strategy for mixin-based FastMCP architecture.
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This test suite demonstrates the recommended patterns for testing FastMCP servers
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that use the mixin composition pattern. It covers:
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1. Individual mixin functionality testing
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2. Tool registration verification
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3. Integration testing of the composed server
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4. Mocking strategies for file operations
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5. Tool functionality testing (not just registration)
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"""
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import pytest
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import tempfile
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import os
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from pathlib import Path
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from unittest.mock import AsyncMock, MagicMock, patch
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from typing import Dict, Any
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from fastmcp import FastMCP
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# FastMCP testing - using direct tool access
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from mcp_office_tools.mixins import UniversalMixin, WordMixin, ExcelMixin, PowerPointMixin
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from mcp_office_tools.utils import OfficeFileError
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class TestMixinArchitecture:
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"""Test the mixin architecture and tool registration."""
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def test_mixin_initialization(self):
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"""Test that mixins initialize correctly with FastMCP app."""
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app = FastMCP("Test Office Tools")
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# Test each mixin initializes without errors
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universal = UniversalMixin(app)
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word = WordMixin(app)
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excel = ExcelMixin(app)
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powerpoint = PowerPointMixin(app)
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assert universal.app == app
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assert word.app == app
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assert excel.app == app
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assert powerpoint.app == app
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def test_tool_registration_count(self):
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"""Test that all expected tools are registered."""
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app = FastMCP("Test Office Tools")
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# Count tools before and after each mixin
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initial_tool_count = len(app._tools)
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universal = UniversalMixin(app)
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universal_tools = len(app._tools) - initial_tool_count
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assert universal_tools == 6 # 6 universal tools
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word = WordMixin(app)
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word_tools = len(app._tools) - initial_tool_count - universal_tools
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assert word_tools == 1 # 1 word tool
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excel = ExcelMixin(app)
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excel_tools = len(app._tools) - initial_tool_count - universal_tools - word_tools
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assert excel_tools == 0 # Placeholder - no tools yet
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powerpoint = PowerPointMixin(app)
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powerpoint_tools = len(app._tools) - initial_tool_count - universal_tools - word_tools - excel_tools
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assert powerpoint_tools == 0 # Placeholder - no tools yet
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def test_tool_names_registration(self):
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"""Test that specific tool names are registered correctly."""
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app = FastMCP("Test Office Tools")
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# Register all mixins
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UniversalMixin(app)
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WordMixin(app)
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ExcelMixin(app)
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PowerPointMixin(app)
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# Check expected tool names
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tool_names = set(app._tools.keys())
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expected_universal_tools = {
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"extract_text",
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"extract_images",
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"extract_metadata",
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"detect_office_format",
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"analyze_document_health",
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"get_supported_formats"
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}
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expected_word_tools = {"convert_to_markdown"}
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assert expected_universal_tools.issubset(tool_names)
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assert expected_word_tools.issubset(tool_names)
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class TestUniversalMixinUnit:
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"""Unit tests for UniversalMixin tools."""
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@pytest.fixture
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def universal_mixin(self):
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"""Create a UniversalMixin instance for testing."""
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app = FastMCP("Test Universal")
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return UniversalMixin(app)
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@pytest.fixture
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def mock_csv_file(self):
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"""Create a mock CSV file for testing."""
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temp_file = tempfile.NamedTemporaryFile(suffix='.csv', delete=False, mode='w')
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temp_file.write("Name,Age,City\nJohn,30,New York\nJane,25,Boston\n")
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temp_file.close()
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yield temp_file.name
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os.unlink(temp_file.name)
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@pytest.mark.asyncio
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async def test_extract_text_error_handling(self, universal_mixin):
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"""Test extract_text error handling for invalid files."""
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with pytest.raises(OfficeFileError):
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await universal_mixin.extract_text("/nonexistent/file.docx")
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@pytest.mark.asyncio
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@patch('mcp_office_tools.utils.validation.validate_office_file')
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@patch('mcp_office_tools.utils.file_detection.detect_format')
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@patch('mcp_office_tools.utils.validation.resolve_office_file_path')
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async def test_extract_text_csv_success(self, mock_resolve, mock_detect, mock_validate, universal_mixin, mock_csv_file):
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"""Test successful CSV text extraction with proper mocking."""
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# Setup mocks
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mock_resolve.return_value = mock_csv_file
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mock_validate.return_value = {"is_valid": True, "errors": []}
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mock_detect.return_value = {
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"category": "data",
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"extension": ".csv",
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"format_name": "CSV"
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}
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# Mock the internal method
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with patch.object(universal_mixin, '_extract_text_by_category') as mock_extract:
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mock_extract.return_value = {
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"text": "Name,Age,City\nJohn,30,New York\nJane,25,Boston",
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"method_used": "pandas",
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"methods_tried": ["pandas"]
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}
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with patch.object(universal_mixin, '_extract_basic_metadata') as mock_metadata:
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mock_metadata.return_value = {"file_size": 1024}
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result = await universal_mixin.extract_text(mock_csv_file)
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assert "text" in result
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assert "metadata" in result
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assert result["metadata"]["extraction_method"] == "pandas"
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assert "John" in result["text"]
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@pytest.mark.asyncio
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async def test_get_supported_formats(self, universal_mixin):
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"""Test get_supported_formats returns expected structure."""
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result = await universal_mixin.get_supported_formats()
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assert isinstance(result, dict)
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assert "supported_extensions" in result
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assert "format_details" in result
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assert "categories" in result
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assert "total_formats" in result
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# Check that common formats are supported
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extensions = result["supported_extensions"]
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assert ".docx" in extensions
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assert ".xlsx" in extensions
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assert ".pptx" in extensions
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assert ".csv" in extensions
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class TestWordMixinUnit:
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"""Unit tests for WordMixin tools."""
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@pytest.fixture
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def word_mixin(self):
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"""Create a WordMixin instance for testing."""
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app = FastMCP("Test Word")
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return WordMixin(app)
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@pytest.mark.asyncio
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async def test_convert_to_markdown_error_handling(self, word_mixin):
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"""Test convert_to_markdown error handling for invalid files."""
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with pytest.raises(OfficeFileError):
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await word_mixin.convert_to_markdown("/nonexistent/file.docx")
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@pytest.mark.asyncio
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@patch('mcp_office_tools.utils.validation.validate_office_file')
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@patch('mcp_office_tools.utils.file_detection.detect_format')
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@patch('mcp_office_tools.utils.validation.resolve_office_file_path')
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async def test_convert_to_markdown_non_word_document(self, mock_resolve, mock_detect, mock_validate, word_mixin):
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"""Test that non-Word documents are rejected for markdown conversion."""
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# Setup mocks for a non-Word document
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mock_resolve.return_value = "/test/file.xlsx"
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mock_validate.return_value = {"is_valid": True, "errors": []}
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mock_detect.return_value = {
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"category": "excel",
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"extension": ".xlsx",
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"format_name": "Excel"
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}
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with pytest.raises(OfficeFileError, match="Markdown conversion currently only supports Word documents"):
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await word_mixin.convert_to_markdown("/test/file.xlsx")
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class TestComposedServerIntegration:
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"""Integration tests for the fully composed server."""
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@pytest.fixture
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def composed_app(self):
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"""Create a fully composed FastMCP app with all mixins."""
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app = FastMCP("MCP Office Tools Test")
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# Initialize all mixins
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UniversalMixin(app)
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WordMixin(app)
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ExcelMixin(app)
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PowerPointMixin(app)
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return app
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def test_all_tools_registered(self, composed_app):
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"""Test that all tools are registered in the composed server."""
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tool_names = set(composed_app._tools.keys())
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# Expected tools from all mixins
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expected_tools = {
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# Universal tools
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"extract_text",
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"extract_images",
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"extract_metadata",
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"detect_office_format",
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"analyze_document_health",
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"get_supported_formats",
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# Word tools
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"convert_to_markdown"
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# Excel and PowerPoint tools will be added when implemented
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}
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assert expected_tools.issubset(tool_names)
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@pytest.mark.asyncio
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async def test_tool_execution_direct(self, composed_app):
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"""Test tool execution through direct tool access."""
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# Test get_supported_formats through direct access
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get_supported_formats_tool = composed_app._tools["get_supported_formats"]
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result = await get_supported_formats_tool()
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assert "supported_extensions" in result
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assert "format_details" in result
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class TestMockingStrategies:
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"""Demonstrate effective mocking strategies for FastMCP tools."""
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@pytest.fixture
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def mock_office_file(self):
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"""Create a realistic mock Office file context."""
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return {
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"path": "/test/document.docx",
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"content": "Mock document content",
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"metadata": {
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"title": "Test Document",
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"author": "Test Author",
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"created": "2024-01-01T00:00:00Z"
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}
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}
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@pytest.mark.asyncio
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@patch('mcp_office_tools.utils.validation.resolve_office_file_path')
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@patch('mcp_office_tools.utils.validation.validate_office_file')
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@patch('mcp_office_tools.utils.file_detection.detect_format')
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async def test_comprehensive_mocking_pattern(self, mock_detect, mock_validate, mock_resolve, mock_office_file):
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"""Demonstrate comprehensive mocking pattern for tool testing."""
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app = FastMCP("Test App")
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universal = UniversalMixin(app)
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# Setup comprehensive mocks
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mock_resolve.return_value = mock_office_file["path"]
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mock_validate.return_value = {"is_valid": True, "errors": []}
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mock_detect.return_value = {
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"category": "word",
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"extension": ".docx",
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"format_name": "Word Document"
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}
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# Mock the internal processing methods
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with patch.object(universal, '_extract_text_by_category') as mock_extract_text:
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mock_extract_text.return_value = {
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"text": mock_office_file["content"],
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"method_used": "python-docx",
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"methods_tried": ["python-docx"]
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}
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with patch.object(universal, '_extract_basic_metadata') as mock_extract_metadata:
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mock_extract_metadata.return_value = mock_office_file["metadata"]
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result = await universal.extract_text(mock_office_file["path"])
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# Verify comprehensive result structure
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assert result["text"] == mock_office_file["content"]
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assert result["metadata"]["extraction_method"] == "python-docx"
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assert result["document_metadata"] == mock_office_file["metadata"]
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# Verify mocks were called correctly
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mock_resolve.assert_called_once_with(mock_office_file["path"])
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mock_validate.assert_called_once_with(mock_office_file["path"])
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mock_detect.assert_called_once_with(mock_office_file["path"])
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class TestFileOperationMocking:
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"""Advanced file operation mocking strategies."""
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@pytest.mark.asyncio
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async def test_temporary_file_creation(self):
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"""Test using temporary files for realistic testing."""
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# Create a temporary CSV file
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with tempfile.NamedTemporaryFile(mode='w', suffix='.csv', delete=False) as tmp:
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tmp.write("Name,Value\nTest,123\n")
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tmp_path = tmp.name
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try:
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# Test with real file
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app = FastMCP("Test App")
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universal = UniversalMixin(app)
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# Mock only the validation/detection layers
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with patch('mcp_office_tools.utils.validation.validate_office_file') as mock_validate:
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with patch('mcp_office_tools.utils.file_detection.detect_format') as mock_detect:
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mock_validate.return_value = {"is_valid": True, "errors": []}
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mock_detect.return_value = {
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"category": "data",
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"extension": ".csv",
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"format_name": "CSV"
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}
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# Test would work with real CSV processing
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# (This demonstrates the pattern without running the full pipeline)
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assert os.path.exists(tmp_path)
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finally:
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os.unlink(tmp_path)
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class TestAsyncPatterns:
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"""Test async patterns specific to FastMCP."""
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@pytest.mark.asyncio
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async def test_async_tool_execution(self):
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"""Test async tool execution patterns."""
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app = FastMCP("Async Test")
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universal = UniversalMixin(app)
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# Mock all async dependencies
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with patch('mcp_office_tools.utils.validation.resolve_office_file_path') as mock_resolve:
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with patch('mcp_office_tools.utils.validation.validate_office_file') as mock_validate:
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with patch('mcp_office_tools.utils.file_detection.detect_format') as mock_detect:
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# Make mocks properly async
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mock_resolve.return_value = "/test.csv"
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mock_validate.return_value = {"is_valid": True, "errors": []}
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mock_detect.return_value = {"category": "data", "extension": ".csv", "format_name": "CSV"}
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with patch.object(universal, '_extract_text_by_category') as mock_extract:
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mock_extract.return_value = {"text": "test", "method_used": "pandas"}
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# This should complete quickly
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result = await universal.extract_text("/test.csv")
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assert "text" in result
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if __name__ == "__main__":
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pytest.main([__file__, "-v"]) |