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TEST_STRATEGY.md

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Test Strategy Document

Overview

This document outlines the comprehensive testing strategy for the Hacker News Article Sorting validation suite. The strategy encompasses multiple testing approaches to ensure robust validation of article chronological ordering while maintaining performance and reliability.

Test Levels

1. Smoke Testing

  • Objective: Quick validation of critical functionality
  • Scope: First page article sorting
  • Frequency: Every commit
  • Success Criteria: Articles on first page are in chronological order

2. Functional Testing

  • Objective: Comprehensive validation of sorting across pages
  • Scope: First 100 articles
  • Areas Covered:
    • Chronological ordering
    • Pagination functionality
    • State persistence
    • Error handling

3. Performance Testing

  • Objective: Ensure efficient and responsive test execution
  • Metrics Tracked:
    • Page load times
    • DOM query performance
    • Memory usage
    • Navigation times
  • Benchmarks:
    • First page load: < 2s
    • DOM operations: < 500ms
    • Memory growth: < 5MB per page
    • Navigation time consistency: < 1s deviation

4. Accessibility Testing

  • Objective: Validate WCAG compliance
  • Coverage:
    • WCAG 2.1 Level AA
    • Heading structure
    • Color contrast
    • ARIA attributes
  • Tools: axe-core

Test Environment

Infrastructure

  • CI/CD: GitHub Actions
  • Containerization: Docker
  • Cross-browser Testing:
    • Chromium
    • Firefox
    • WebKit

Configuration Management

  • Version Control: Git
  • Dependencies: npm
  • Environment Variables: Configured in Docker and CI

Test Execution

Automated Test Suite

  1. Setup Phase

    • Environment preparation
    • Browser installation
    • Rate limit guard initialization

  2. Execution Phase

    • Sequential test execution
    • Cross-browser parallel runs in CI
    • Performance metric collection

  3. Reporting Phase

    • Test results aggregation
    • Performance metrics analysis
    • Coverage reporting
    • Screenshot and video capture

Rate Limiting Protection

  • Token bucket algorithm
  • Exponential backoff
  • Request queuing
  • Automatic recovery

Quality Metrics

Coverage Targets

  • Line Coverage: > 90%
  • Branch Coverage: > 85%
  • Function Coverage: > 95%

Performance Targets

  • Execution Time: < 30s for full suite
  • Resource Usage: < 500MB peak memory
  • Success Rate: > 99.9%

Reliability Metrics

  • Flakiness: < 0.1%
  • False Positives: 0
  • Recovery Rate: 100%

Monitoring and Maintenance

Continuous Monitoring

  • Test execution metrics
  • Performance trends
  • Error patterns
  • Resource utilization

Maintenance Strategy

  • Regular dependency updates
  • Performance optimization
  • Test case refinement
  • Documentation updates

Reporting

Test Reports

  • HTML test results
  • JUnit XML reports
  • JSON performance data
  • Coverage reports

Artifacts

  • Test execution videos
  • Failure screenshots
  • Performance traces
  • Log files

Risk Mitigation

Identified Risks

  1. Rate limiting
  2. Network instability
  3. DOM changes
  4. Browser inconsistencies

Mitigation Strategies

  1. Smart request management
  2. Robust retry logic
  3. Resilient selectors
  4. Cross-browser validation

Best Practices

Code Quality

  • TypeScript for type safety
  • ESLint for code style
  • Prettier for formatting
  • JSDoc for documentation

Test Design

  • Page Object Model
  • Atomic test cases
  • Clear assertions
  • Comprehensive error handling

Performance

  • Efficient DOM queries
  • Resource cleanup
  • Memory management
  • Parallel execution where safe

Future Enhancements

Planned Improvements

  1. Visual regression testing
  2. Mobile device testing

Maintenance Schedule

  • Daily automated runs
  • Weekly dependency updates
  • Monthly performance review
  • Quarterly strategy review