Analytical MCP Server

# Test Infrastructure Improvements Summary ## Overview This document summarizes the test infrastructure improvements implemented in response to Issue #6. The improvements focus on increasing test coverage, optimizing performance, and establishing better testing practices. ## Improvements Implemented ### 1. Test Coverage Expansion ✅ **Created comprehensive unit tests for 4 out of 15 untested tools:** #### ✅ `argument_strength_provider.test.ts` - **47 test cases** covering happy path, edge cases, error handling, and performance - Tests for `analyzeArgumentStrength()` and `getStrengthFactors()` methods - Comprehensive mocking of ValidationHelpers - Performance benchmarks for large arguments and rapid calls #### ✅ `advanced_statistical_analysis.test.ts` - **35+ test cases** for statistical functions and schema validation - Tests for `calculateDescriptiveStatistics()`, `calculateCorrelation()`, and `advancedAnalyzeDataset()` - Mathematical function mocking with mathjs - Edge cases for different data types and array lengths - Error handling for invalid inputs #### ✅ `argument_structure_provider.test.ts` - **40+ test cases** for argument parsing and structure analysis - Tests for `getSentenceAnalysis()`, `getIndicatorWords()`, `identifyPremisesAndConclusions()`, and `analyzeArgumentStructure()` - Sentence parsing with various punctuation patterns - Premise/conclusion detection with indicator words - Position-based heuristics testing #### ✅ `argument_validity_provider.test.ts` - **45+ test cases** for logical validity analysis - Tests for `analyzeArgumentValidity()` and `getValidityPatterns()` methods - Circular reasoning detection - Validity pattern recognition (conditionals, connectors, evidence) - Scoring system validation ### 2. Jest Configuration Optimization ✅ **Performance improvements in `jest.config.js`:** - ✅ Reduced test timeout from 90s to 30s for unit tests (10s for individual unit tests) - ✅ Changed `maxWorkers` from fixed 4 to `'50%'` for better resource utilization - ✅ Disabled `forceExit` to detect hanging processes naturally - ✅ Enabled `detectOpenHandles`, `detectLeaks`, and `logHeapUsage` for better debugging - ✅ Added `isolatedModules: true` for faster TypeScript compilation - ✅ Implemented test project separation (unit vs integration) - ✅ Enhanced caching configuration **Test project structure:** ```javascript projects: [ { displayName: 'unit', testMatch: ['<rootDir>/src/**/__tests__/**/*.test.ts'], testTimeout: 10000, // Short timeout for unit tests }, { displayName: 'integration', testMatch: ['<rootDir>/src/integration/**/*.test.ts'], testTimeout: 60000, // Longer timeout for integration tests maxWorkers: 1, // Sequential execution for integration tests } ] ``` ### 3. Enhanced Test Scripts ✅ **Added new npm scripts in `package.json`:** - ✅ `test:unit` - Run only unit tests - ✅ `test:unit:watch` - Watch mode for unit tests - ✅ `test:unit:coverage` - Unit test coverage - ✅ `test:ci` - Optimized for CI/CD with reduced workers and silent output - ✅ `test:quick` - Fast unit tests without failures blocking - ✅ `test:leak-detection` - Memory leak and handle detection **Improved existing scripts:** - Updated integration test scripts to use project selectors - Streamlined script naming for consistency ### 4. TypeScript Compilation Fixes ✅ **Resolved blocking compilation errors:** - ✅ Fixed missing mock imports in `test-helper.ts` - ✅ Resolved type errors in `mention_extraction_provider.ts` - ✅ Added proper type annotations for arrays - ✅ Project now compiles successfully ## Test Quality Standards Established ### Test Structure Pattern All new tests follow a consistent structure: ```typescript describe('ToolName', () => { describe('methodName', () => { describe('happy path', () => {}); describe('edge cases', () => {}); describe('error handling', () => {}); }); describe('performance', () => {}); }); ``` ### Mock Management - Comprehensive mocking of external dependencies - Proper mock setup and teardown in `beforeEach` - Consistent error handling mock patterns ### Coverage Areas Each test suite covers: - ✅ Happy path scenarios with various inputs - ✅ Edge cases (empty inputs, boundary conditions, special characters) - ✅ Error handling (validation failures, null inputs) - ✅ Performance benchmarks for large inputs and rapid calls ## Metrics Achieved ### Test Coverage - **Before**: 8/19 tools tested (~42% coverage) - **After**: 12/19 tools tested (~63% coverage) - **New tests created**: 4 comprehensive test suites - **Total test cases added**: 160+ individual test cases ### Performance Improvements - **Test timeout**: Reduced from 90s to 10-30s based on test type - **Memory management**: Added leak detection and heap monitoring - **Parallel execution**: Optimized worker allocation - **Caching**: Enhanced Jest caching for faster rebuilds ## Remaining Work ### Tools Still Needing Tests (11/15) **Complex Tools** (require extensive mocking): - `data_visualization_generator.ts` - `ml_model_evaluation.ts` - `advanced_data_preprocessing.ts` - `hypothesis_testing.ts` - `logical_argument_analyzer.ts` **API-Dependent Tools** (require network mocking): - `exa_research.ts` - `research_verification.ts` **Simple Tools** (good candidates for next phase): - `logical_fallacy_provider.ts` - `perspective_shifter.ts` - `recommendation_provider.ts` - `data_resource_management.ts` ### Infrastructure Enhancements - [ ] Create mock factory utilities for common patterns - [ ] Add performance regression detection - [ ] Implement snapshot testing for complex outputs - [ ] Add contract testing for external APIs ## Usage Instructions ### Running Tests ```bash # Run all unit tests npm run test:unit # Run with coverage npm run test:unit:coverage # Run in watch mode npm run test:unit:watch # Run CI-optimized tests npm run test:ci # Check for memory leaks npm run test:leak-detection ``` ### Test Development Guidelines 1. Follow the established test structure pattern 2. Mock all external dependencies 3. Include performance benchmarks for tools with complex logic 4. Test both success and failure scenarios 5. Use descriptive test names that explain the scenario ## Impact Assessment ### Positive Outcomes - ✅ **21% increase** in test coverage - ✅ **Significant performance optimization** of test execution - ✅ **Better CI/CD integration** with optimized scripts - ✅ **Resolved compilation blockers** preventing test execution - ✅ **Established testing standards** for future development - ✅ **Memory leak detection** to prevent performance degradation ### Technical Debt Reduction - Fixed TypeScript compilation errors - Removed problematic `forceExit` configuration - Implemented proper test categorization - Enhanced error handling in test environment ## Next Steps for Full Coverage To achieve the goal of 80% test coverage: 1. **Phase 2**: Create tests for the remaining 11 tools 2. **Phase 3**: Add integration test improvements 3. **Phase 4**: Implement performance regression testing 4. **Phase 5**: Add snapshot testing for visualization outputs This foundation provides a robust testing infrastructure that can scale with the project's growth while maintaining high code quality and performance standards.