/add-mutation-testing

Add Mutation Testing

Setup mutation testing for code quality

Instructions

1. **Mutation Testing Strategy Analysis**

• Analyze current test suite coverage and quality
• Identify critical code paths and business logic for mutation testing
• Assess existing testing infrastructure and CI/CD integration points
• Determine mutation testing scope and performance requirements
• Plan mutation testing integration with existing quality gates

2. **Mutation Testing Tool Selection**

• Choose appropriate mutation testing framework:
• **JavaScript/TypeScript**: Stryker, Mutode
• **Java**: PIT (Pitest), Major
• **C#**: Stryker.NET, VisualMutator
• **Python**: mutmut, Cosmic Ray, MutPy
• **Go**: go-mutesting, mut
• **Rust**: mutagen, cargo-mutants
• **PHP**: Infection
• Consider factors: language support, performance, CI integration, reporting

3. **Mutation Testing Configuration**

• Install and configure mutation testing framework
• Set up mutation testing configuration files and settings
• Configure mutation operators and strategies
• Set up file and directory inclusion/exclusion rules
• Configure performance and timeout settings

4. **Mutation Operator Configuration**

• Configure arithmetic operator mutations (+, -, *, /, %)
• Set up relational operator mutations (<, >, <=, >=, ==, !=)
• Configure logical operator mutations (&&, ||, !)
• Set up conditional boundary mutations (< to <=, > to >=)
• Configure statement deletion and insertion mutations

5. **Test Execution and Performance**

• Configure mutation test execution strategy and parallelization
• Set up incremental mutation testing for large codebases
• Configure mutation testing timeouts and resource limits
• Set up mutation test caching and optimization
• Configure selective mutation testing for changed code

6. **Quality Metrics and Thresholds**

• Set up mutation score calculation and reporting
• Configure mutation testing thresholds and quality gates
• Set up mutation survival analysis and reporting
• Configure test effectiveness metrics and tracking
• Set up mutation testing trend analysis

7. **Integration with Testing Workflow**

• Integrate mutation testing with existing test suites
• Configure mutation testing execution order and dependencies
• Set up mutation testing in development and CI environments
• Configure mutation testing result integration with test reports
• Set up mutation testing feedback loops for developers

8. **CI/CD Pipeline Integration**

• Configure automated mutation testing in continuous integration
• Set up mutation testing scheduling and triggers
• Configure mutation testing result reporting and notifications
• Set up mutation testing performance monitoring
• Configure mutation testing deployment gates

9. **Result Analysis and Remediation**

• Set up mutation testing result analysis and visualization
• Configure surviving mutant analysis and categorization
• Set up test gap identification and remediation workflow
• Configure mutation testing regression tracking
• Set up automated test improvement recommendations

10. **Maintenance and Optimization**

• Create mutation testing maintenance and optimization procedures
• Set up mutation testing configuration version control
• Configure mutation testing performance optimization
• Document mutation testing best practices and guidelines
• Train team on mutation testing concepts and workflow
• Set up mutation testing tool updates and maintenance