223 lines
6.5 KiB
Markdown
223 lines
6.5 KiB
Markdown
# Test Levels Framework for Enterprise Applications
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## Testing Pyramid Overview
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The testing pyramid provides a structured approach to test coverage, emphasizing cost-effective automation and comprehensive validation.
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```
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/\
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/E2E\ ← Few, high-value tests
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/______\
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/ UI \ ← Moderate coverage
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/__________\
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/ Unit \ ← High coverage, fast execution
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____________\
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```
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## Unit Testing (Foundation Level)
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### Coverage Standards
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- **Target Coverage**: 80%+ for business logic and utilities
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- **Critical Areas**: 95%+ for security, payment, and data processing functions
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- **Documentation**: Each test should clearly describe expected behavior
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### Focus Areas
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**Business Logic**:
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- Input validation and sanitization
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- Calculation accuracy and edge cases
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- State transitions and workflow logic
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- Error handling and exception scenarios
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**Utilities and Helpers**:
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- Data transformation functions
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- Formatting and parsing utilities
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- Configuration and settings management
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- Custom validation functions
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### Testing Standards
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- **Naming**: Use descriptive test names explaining expected behavior
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- **Structure**: Follow Arrange-Act-Assert (AAA) pattern
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- **Independence**: Each test should run independently without dependencies
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- **Performance**: Unit tests should execute quickly (< 100ms per test)
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## Integration Testing (Connection Level)
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### API Integration Testing
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**Coverage Areas**:
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- All API endpoints with various input combinations
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- Authentication and authorization flows
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- Data validation and error responses
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- Third-party service integrations
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**Testing Scenarios**:
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- Happy path scenarios with valid data
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- Error scenarios with invalid inputs
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- Edge cases and boundary conditions
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- Rate limiting and timeout handling
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### Database Integration Testing
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**Coverage Areas**:
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- CRUD operations on all entities
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- Complex queries and joins
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- Transaction handling and rollbacks
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- Data migration and schema changes
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**Performance Considerations**:
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- Query performance under load
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- Connection pooling and management
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- Data consistency and integrity
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- Backup and recovery procedures
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### Service Integration Testing
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**Focus Areas**:
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- Microservice communication patterns
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- Message queue processing
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- Event-driven workflows
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- Service discovery and load balancing
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## End-to-End Testing (User Experience Level)
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### Critical User Journeys
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**High-Priority Flows**:
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- User registration and onboarding
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- Authentication and password recovery
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- Core business functionality workflows
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- Payment processing and transactions
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- Data export and reporting features
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### Testing Framework Standards
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**Cypress E2E Guidelines**:
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- Use `data-testid` selectors for reliable element targeting
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- Implement API mocking with `cy.intercept` for external dependencies
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- Avoid hardcoded waits - use proper waiting strategies
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- Create focused test files with 3-5 tests each for maintainability
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**Scenario Structure**:
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```gherkin
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Feature: User Authentication
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Scenario: Successful user login
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Given the user is on the login page
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When they enter valid credentials
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Then they should be redirected to the dashboard
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And they should see their profile information
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```
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### Cross-Platform Testing
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**Browser Compatibility**:
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- Chrome, Firefox, Safari, Edge
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- Mobile browsers (iOS Safari, Android Chrome)
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- Different screen resolutions and device types
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**Accessibility Testing**:
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- Screen reader compatibility
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- Keyboard navigation support
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- Color contrast compliance (WCAG 2.1 AA)
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- Focus management and ARIA labels
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## Manual Testing (Exploratory Level)
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### Usability Testing
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**Focus Areas**:
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- User interface intuitiveness and navigation
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- Error message clarity and helpfulness
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- Form completion and validation feedback
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- Mobile responsiveness and touch interactions
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### Exploratory Testing
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**Approach**:
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- Unscripted testing to discover edge cases
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- User workflow validation from real-world perspective
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- Performance testing under various conditions
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- Security testing for common vulnerabilities
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### Acceptance Testing
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**Stakeholder Validation**:
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- Business requirement verification
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- User story acceptance criteria validation
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- Regulatory compliance confirmation
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- Performance benchmark achievement
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## Performance Testing Levels
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### Load Testing
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**Metrics to Monitor**:
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- Response times under normal load
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- Throughput and requests per second
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- Resource utilization (CPU, memory, database)
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- Error rates and failure points
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### Stress Testing
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**Scenarios**:
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- Peak traffic simulation
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- Resource exhaustion testing
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- Failure recovery validation
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- Scalability limit identification
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### Security Testing
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**Coverage Areas**:
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- Authentication and authorization vulnerabilities
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- Data encryption and transmission security
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- Input validation and injection attacks
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- Session management and token security
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## Test Environment Strategy
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### Environment Levels
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**Development Environment**:
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- Unit and integration testing
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- Developer testing and debugging
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- Fast feedback loops
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- Mock services and test data
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**Staging Environment**:
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- Production-like configuration
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- End-to-end testing
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- Performance testing
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- Integration with external services
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**Production Environment**:
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- Smoke testing after deployments
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- Monitoring and alerting validation
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- A/B testing and feature flags
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- Real user monitoring
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## Quality Gates and Metrics
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### Coverage Thresholds
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- **Unit Tests**: 80% minimum, 90% target
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- **Integration Tests**: All API endpoints and database operations
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- **E2E Tests**: All critical user journeys
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- **Manual Tests**: All acceptance criteria validated
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### Quality Metrics
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**Automated Testing**:
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- Test execution time and efficiency
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- Flaky test identification and resolution
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- Code coverage trends over time
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- Defect detection rate by test level
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**Manual Testing**:
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- User satisfaction scores
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- Usability issue identification
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- Accessibility compliance validation
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- Business requirement satisfaction
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## Implementation Guidelines by Agent
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### QA Agent Responsibilities
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- Create comprehensive test strategy aligned with this framework
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- Design test scenarios using Gherkin format for clarity
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- Validate test coverage across all levels of the pyramid
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- Ensure quality gates are met before deployment approval
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### Developer Agent Integration
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- Implement unit tests following TDD practices
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- Create integration tests for all API endpoints
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- Set up automated test execution in CI/CD pipelines
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- Maintain test data and mock services
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### Architect Agent Considerations
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- Design testable system architecture
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- Plan test environment infrastructure
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- Consider performance testing requirements in system design
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- Ensure monitoring and observability for production testing |