Add Property-Based Testing

Implement property-based testing framework

Instructions

1. Property-Based Testing Analysis

   • Analyze current codebase to identify functions suitable for property-based testing
   • Identify mathematical properties, invariants, and business rules to test
   • Assess existing testing infrastructure and integration requirements
   • Determine scope of property-based testing implementation
   • Plan integration with existing unit and integration tests

2. Framework Selection and Installation

   • Choose appropriate property-based testing framework:
     • JavaScript/TypeScript: fast-check, JSVerify
     • Python: Hypothesis, QuickCheck
     • Java: jqwik, QuickTheories
     • C#: FsCheck, CsCheck
     • Rust: proptest, quickcheck
     • Go: gopter, quick
   • Install framework and configure with existing test runner
   • Set up framework integration with build system

3. Property Definition and Implementation

   • Define mathematical properties and invariants for core functions
   • Implement property tests for data transformation functions
   • Create property tests for API contract validation
   • Set up property tests for business logic validation
   • Define properties for data structure consistency

4. Test Data Generation

   • Configure generators for primitive data types
   • Create custom generators for domain-specific objects
   • Set up composite generators for complex data structures
   • Configure generator constraints and boundaries
   • Implement shrinking strategies for minimal failing examples

5. Property Test Categories

   • Roundtrip Properties: Serialize/deserialize, encode/decode operations
   • Invariant Properties: Data structure consistency, business rule validation
   • Metamorphic Properties: Equivalent operations, transformation consistency
   • Model-Based Properties: State machine testing, system behavior validation
   • Oracle Properties: Comparison with reference implementations

6. Integration with Existing Tests

   • Integrate property-based tests with existing test suites
   • Configure test execution order and dependencies
   • Set up property test reporting and coverage tracking
   • Configure test timeout and resource management
   • Implement property test categorization and tagging

7. Advanced Testing Strategies

   • Set up stateful property testing for complex systems
   • Configure model-based testing for state machines
   • Implement targeted property testing for known issues
   • Set up regression property testing for bug prevention
   • Configure performance property testing for algorithmic validation

8. Test Configuration and Tuning

   • Configure test case generation limits and timeouts
   • Set up shrinking parameters and strategies
   • Configure random seed management for reproducibility
   • Set up test distribution and statistical analysis
   • Configure parallel test execution and resource management

9. CI/CD Integration

   • Configure property-based tests in continuous integration
   • Set up test result reporting and failure analysis
   • Configure test execution policies and resource limits
   • Set up automated property test maintenance
   • Configure property test performance monitoring

10. Documentation and Team Training

    • Create comprehensive property-based testing documentation
    • Document property definition patterns and best practices
    • Create examples and templates for common property patterns
    • Train team on property-based testing concepts and implementation
    • Set up property test maintenance and evolution guidelines
    • Document troubleshooting procedures for property test failures