# Test Coverage Requirements Task

## Purpose
Define and enforce comprehensive test coverage requirements to ensure code quality, prevent regressions, and maintain system reliability. This task establishes testing standards and validates compliance across all test levels.

## Integration with Memory System
- **What patterns to search for**: Test coverage trends, common test gaps, regression patterns, test maintenance burden
- **What outcomes to track**: Coverage percentages, test execution times, defect escape rates, regression frequency
- **What learnings to capture**: Effective test strategies, high-value test areas, test automation ROI, maintenance patterns

## Test Coverage Categories

### Unit Test Requirements
```yaml
unit_test_coverage:
  minimum_coverage: 90%
  critical_paths: 100%
  
  required_tests:
    - happy_path: All success scenarios
    - edge_cases: Boundary conditions
    - error_handling: Exception scenarios
    - null_checks: Null/undefined inputs
    - validation: Input validation logic
  
  excluded_from_coverage:
    - generated_code: Auto-generated files
    - config_files: Static configurations
    - type_definitions: Interface/type files
```

### Integration Test Requirements
- [ ] **API Tests**: All endpoints with various payloads
- [ ] **Database Tests**: CRUD operations, transactions
- [ ] **External Service Tests**: Mock integrations
- [ ] **Message Queue Tests**: Pub/sub scenarios
- [ ] **Authentication Tests**: Auth flows, permissions

### End-to-End Test Requirements
- [ ] **Critical User Journeys**: Primary workflows
- [ ] **Cross-Browser Tests**: Major browser support
- [ ] **Performance Tests**: Load time requirements
- [ ] **Accessibility Tests**: WCAG compliance
- [ ] **Mobile Tests**: Responsive behavior

## Coverage Measurement Framework

### Step 1: Coverage Analysis
```python
def analyze_test_coverage():
    coverage_report = {
        "unit": {
            "line_coverage": calculate_line_coverage(),
            "branch_coverage": calculate_branch_coverage(),
            "function_coverage": calculate_function_coverage(),
            "statement_coverage": calculate_statement_coverage()
        },
        "integration": {
            "api_coverage": calculate_api_endpoint_coverage(),
            "scenario_coverage": calculate_business_scenario_coverage(),
            "error_coverage": calculate_error_scenario_coverage()
        },
        "e2e": {
            "user_journey_coverage": calculate_journey_coverage(),
            "browser_coverage": calculate_browser_coverage(),
            "device_coverage": calculate_device_coverage()
        }
    }
    return coverage_report
```

### Step 2: Gap Identification
```markdown
## Test Coverage Gap Analysis
**Component**: {component_name}
**Current Coverage**: {current}%
**Required Coverage**: {required}%
**Gap**: {gap}%

### Uncovered Areas
1. **{Area}**: {description}
   - Risk Level: {high/medium/low}
   - Priority: {priority}
   - Estimated Effort: {effort}

### Recommended Tests
- {test_type}: {test_description}
```

### Step 3: Test Quality Validation
| Test Aspect | Requirement | Status | Notes |
|-------------|-------------|---------|--------|
| Assertions | Meaningful assertions | ✓/✗ | {notes} |
| Independence | No test interdependence | ✓/✗ | {notes} |
| Repeatability | Consistent results | ✓/✗ | {notes} |
| Performance | <2s for unit tests | ✓/✗ | {notes} |
| Clarity | Self-documenting | ✓/✗ | {notes} |

## Quality Gates

### Development Gate
- [ ] Unit tests written for new code
- [ ] Coverage threshold maintained
- [ ] All tests passing locally
- [ ] No skipped tests without justification

### Pull Request Gate
- [ ] Coverage report generated
- [ ] No coverage decrease
- [ ] Integration tests updated
- [ ] Test documentation current

### Release Gate
- [ ] E2E tests passing
- [ ] Performance benchmarks met
- [ ] Security tests passing
- [ ] Regression suite complete

## Test Strategy Guidelines

### Test Pyramid Balance
```python
test_distribution = {
    "unit_tests": {
        "percentage": 70,
        "execution_time": "< 5 minutes",
        "frequency": "every commit"
    },
    "integration_tests": {
        "percentage": 20,
        "execution_time": "< 15 minutes",
        "frequency": "every PR"
    },
    "e2e_tests": {
        "percentage": 10,
        "execution_time": "< 30 minutes",
        "frequency": "before release"
    }
}
```

### Critical Path Identification
```python
critical_paths = [
    "user_authentication_flow",
    "payment_processing",
    "data_integrity_operations",
    "security_validations",
    "core_business_logic"
]

# These paths require 100% coverage
```

## Success Criteria
- Overall test coverage >90%
- Critical path coverage 100%
- Zero untested public methods
- Test execution time within limits
- Defect escape rate <5%

## Memory Integration
```python
# Test coverage memory
test_coverage_memory = {
    "type": "test_coverage_analysis",
    "snapshot": {
        "timestamp": analysis_time,
        "project": project_name,
        "version": code_version
    },
    "coverage": {
        "unit": unit_coverage_details,
        "integration": integration_coverage_details,
        "e2e": e2e_coverage_details,
        "overall": weighted_average
    },
    "gaps": {
        "identified": coverage_gaps,
        "risk_assessment": gap_risks,
        "remediation_plan": improvement_plan
    },
    "trends": {
        "coverage_trend": historical_comparison,
        "test_growth": test_count_trend,
        "execution_time": performance_trend
    },
    "quality": {
        "flaky_tests": unstable_test_count,
        "slow_tests": performance_outliers,
        "skipped_tests": disabled_test_count
    }
}
```

## Coverage Report Template
```markdown
# Test Coverage Report
**Project**: {project_name}
**Date**: {timestamp}
**Overall Coverage**: {percentage}%

## Coverage Summary
| Type | Required | Actual | Gap | Status |
|------|----------|--------|-----|---------|
| Unit | 90% | {n}% | {g}% | {✓/✗} |
| Integration | 80% | {n}% | {g}% | {✓/✗} |
| E2E | 70% | {n}% | {g}% | {✓/✗} |

## Critical Path Coverage
| Path | Coverage | Tests | Status |
|------|----------|--------|--------|
| {path} | {cov}% | {count} | {status} |

## Test Quality Metrics
- **Total Tests**: {count}
- **Execution Time**: {time}
- **Flaky Tests**: {count}
- **Skipped Tests**: {count}

## Coverage Gaps - High Priority
1. **{Component}**: {current}% → {target}%
   - Missing: {test_types}
   - Risk: {risk_level}
   - Action: {action_plan}

## Recommendations
1. **Immediate**: {urgent_gaps}
2. **Next Sprint**: {planned_improvements}
3. **Long-term**: {strategic_improvements}

## Test Maintenance Needs
{test_refactoring_requirements}
```

## Brotherhood Collaboration
- Coverage review with development team
- Test strategy with QA team
- Risk assessment with product team
- Performance impact with DevOps team