RuntimePluggableClassFactory Testing Strategy

Overview

This document outlines the comprehensive testing strategy for the RuntimePluggableClassFactory project, implementing the TDS requirements for thorough testing coverage.

Test Categories

1. Unit Tests (RuntimeTests.cs)

Purpose: Test individual components in isolation Coverage: Core functionality, basic plugin loading, version handling

Key Test Areas:

• Plugin discovery and enumeration
• Version-specific plugin loading
• Basic plugin execution
• Error handling for missing plugins
• Plugin metadata validation

Test Count: 4 tests

2. Stability Tests (StabilityTests.cs)

Purpose: Validate system stability and error resilience Coverage: Error handling, exception management, system recovery

Key Test Areas:

• Plugin loading failure handling
• Error event propagation
• System stability during plugin failures
• Graceful degradation scenarios

Test Count: 5 tests

3. Unloading Tests (UnloadingTests.cs)

Purpose: Test dynamic plugin unloading capabilities Coverage: AssemblyLoadContext management, memory cleanup

Key Test Areas:

• Individual plugin unloading
• Bulk plugin unloading
• Memory cleanup verification
• Context isolation validation

Test Count: 2 tests

4. Typed Plugin Tests (TypedPluginTests.cs)

Purpose: Validate type-safe plugin execution system Coverage: Generic interfaces, strongly-typed DTOs, functional context

Key Test Areas:

• Typed plugin discovery and loading
• Strongly-typed input/output validation
• Execution context with logging and cancellation
• Type safety enforcement
• Async execution with timeout handling

Test Count: 8 tests

5. Security Tests (SecurityTests.cs)

Purpose: Validate security hardening features Coverage: Plugin validation, security policies, threat mitigation

Key Test Areas:

• Security settings configuration (Default, Strict, Permissive)
• Plugin security validation (file, assembly, type-level)
• Trusted path management
• Security event handling
• Integration with plugin loading process

Test Count: 13 tests

6. Integration Tests (IntegrationTests.cs)

Purpose: Test complete end-to-end workflows Coverage: Full system integration, real-world scenarios

Key Test Areas:

• Complete plugin workflow (load → execute → unload)
• Typed plugin end-to-end execution
• Security integration with strict settings
• Concurrent plugin execution
• Plugin unloading and reloading cycles
• Error handling integration
• Memory management validation
• Plugin execution context integration

Test Count: 8 tests

7. Performance Tests (PerformanceTests.cs)

Purpose: Ensure system meets performance requirements Coverage: Load times, execution speed, memory usage, scalability

Key Test Areas:

• Plugin discovery performance (< 5 seconds)
• Plugin instantiation performance (< 100ms average, < 500ms max)
• Plugin execution performance (< 10ms average for simple operations)
• Concurrent execution scalability (> 100 executions/second)
• Security validation performance (< 500ms average)
• Memory usage under load (< 50MB increase)
• Typed plugin performance overhead
• Load/unload cycle performance (< 2 seconds average)

Test Count: 8 tests

Total Test Coverage

Total Tests: 48 tests across 7 test categories Coverage Areas:

• ✅ Core plugin loading and execution
• ✅ Dynamic plugin unloading
• ✅ Type-safe plugin system
• ✅ Security hardening
• ✅ Error handling and stability
• ✅ Performance and scalability
• ✅ Memory management
• ✅ Concurrent execution
• ✅ Integration scenarios

TDS Requirements Coverage

✅ Dynamic Plugin Loading/Unloading

• Unit Tests: Basic loading functionality
• Unloading Tests: Dynamic unloading with AssemblyLoadContext
• Integration Tests: Complete load/unload cycles
• Performance Tests: Load/unload performance validation

✅ Enhanced Stability and Error Handling

• Stability Tests: Error resilience and recovery
• Integration Tests: Error handling integration
• All Test Categories: Comprehensive exception handling

✅ API Redesign with Type Safety

• Typed Plugin Tests: Generic interfaces and strongly-typed DTOs
• Integration Tests: Type-safe execution workflows
• Performance Tests: Typed plugin performance validation

✅ Security Hardening

• Security Tests: Comprehensive security validation
• Integration Tests: Security integration scenarios
• Performance Tests: Security validation performance

✅ Comprehensive Testing Strategy

• All Categories: Complete test coverage implementation
• Performance Tests: Performance requirement validation
• Integration Tests: End-to-end scenario coverage

Performance Requirements

The testing strategy validates the following performance requirements:

Metric	Requirement	Test Coverage
Plugin Discovery	< 5 seconds	✅ Performance Tests
Plugin Instantiation (Avg)	< 100ms	✅ Performance Tests
Plugin Instantiation (Max)	< 500ms	✅ Performance Tests
Plugin Execution	< 10ms average	✅ Performance Tests
Concurrent Throughput	> 100 exec/sec	✅ Performance Tests
Security Validation	< 500ms average	✅ Performance Tests
Memory Growth	< 50MB under load	✅ Performance Tests
Load/Unload Cycle	< 2 seconds	✅ Performance Tests

Test Execution Strategy

Continuous Integration

• All tests run on every commit
• Performance tests run with reasonable thresholds
• Security tests validate all security policies

Test Categories by Environment

• Development: All test categories
• CI/CD: All test categories with performance monitoring
• Production Validation: Integration and performance tests

Test Data Management

• Tests use existing plugin implementations in PluginFolder
• No external dependencies required
• Self-contained test scenarios

Quality Assurance

Code Coverage

• Comprehensive coverage of all major components
• Edge case validation in all test categories
• Error path testing in stability tests

Test Reliability

• Tests designed to be deterministic
• Proper setup and teardown procedures
• Resource cleanup in all test categories

Maintainability

• Clear test naming conventions
• Comprehensive test documentation
• Modular test structure for easy extension

Future Enhancements

Potential Additional Test Categories

1. Load Tests: Extended load testing scenarios
2. Stress Tests: System behavior under extreme conditions
3. Compatibility Tests: Cross-platform and version compatibility
4. Regression Tests: Automated regression detection

Monitoring and Metrics

1. Test execution time tracking
2. Performance trend analysis
3. Test coverage reporting
4. Failure pattern analysis

Conclusion

The comprehensive testing strategy ensures the RuntimePluggableClassFactory meets all TDS requirements with robust validation across functionality, performance, security, and reliability dimensions. The 48 tests across 7 categories provide thorough coverage of all system aspects, ensuring production readiness and maintainability.