# Test Coverage Analysis & Calculation

## Standardized Coverage Calculation Methodology

### Coverage Components (Standardized Weights)

**Component Breakdown**:

1. **CRUD Operations** (25%):
    - Create functionality
    - Read/Query operations
    - Update capabilities
    - Delete operations

2. **Business Logic** (35%):
    - Property validation and filters
    - Calculated fields and derivations
    - Business rule enforcement
    - Workflow logic

3. **Integration Points** (20%):
    - External service interactions
    - Database operations
    - Message queue processing
    - API integrations

4. **Error Handling** (20%):
    - Input validation errors
    - Business rule violations
    - System error scenarios
    - Edge case handling

### Coverage Assessment Scale

- **90-100%**: **Comprehensive** - All major operations and error scenarios covered
- **80-89%**: **High** - Good coverage with minor gaps in error handling
- **70-79%**: **Medium** - Basic operations covered, missing error scenarios
- **60-69%**: **Low** - Minimal coverage, significant gaps in business logic
- **Below 60%**: **Inadequate** - Major functionality untested

### Calculation Formula

```text
Total Coverage = (
    (CRUD_Score × 0.25) +
    (BusinessLogic_Score × 0.35) +
    (Integration_Score × 0.20) +
    (ErrorHandling_Score × 0.20)
)

Where each score is a percentage (0-100) of coverage in that category.
```

**Example Calculation**:

```text
CRUD Operations: 90% coverage
Business Logic: 75% coverage
Integration Points: 80% coverage
Error Handling: 60% coverage

Total Coverage = (90×0.25) + (75×0.35) + (80×0.20) + (60×0.20)
               = 22.5 + 26.25 + 16 + 12
               = 76.75% (Medium Coverage)
```

## Coverage Documentation Template

### Component Analysis

**CRUD Operations Coverage**: X%

- ✅ Create: [List covered operations]
- ✅ Read: [List covered queries]
- ✅ Update: [List covered updates]
- ❌ Delete: [List missing operations]

**Business Logic Coverage**: X%

- ✅ Validation: [List covered validations]
- ❌ Calculations: [List missing calculations]
- ✅ Rules: [List covered business rules]

**Integration Coverage**: X%

- ✅ External APIs: [List covered integrations]
- ❌ Messaging: [List missing message handling]

**Error Handling Coverage**: X%

- ❌ Input Validation: [List missing error scenarios]
- ❌ Business Violations: [List missing error cases]

**Overall Coverage**: X% ([Coverage Level])

## Test Coverage Categories

### 🟢 High Coverage (80-100%)

**Characteristics**:

- All major CRUD operations tested through GraphQL or Mocha
- Business logic comprehensively covered with both happy path and error scenarios
- Integration points verified with proper mocking and async testing
- Error handling explicitly tested for common failure modes
- Edge cases documented and validated

**Evidence Required**:

- GraphQL tests covering primary workflows
- Mocha tests for error scenarios and edge cases
- Async operation testing with proper wait utilities
- Documentation of test coverage areas

**Recommended Actions**:

- Maintain current test quality
- Add regression tests for bug fixes
- Review and update tests with business logic changes
- Consider performance testing for critical operations

### 🟡 Medium Coverage (60-79%)

**Characteristics**:

- Basic CRUD operations tested but missing some scenarios
- Core business logic covered but lacking edge case validation
- Some integration testing present but async operations may be untested
- Limited error scenario coverage

**Evidence Required**:

- Some GraphQL tests present covering main operations
- Limited Mocha tests focusing on primary business logic
- Basic test structure in place but gaps in comprehensive coverage

**Recommended Actions**:

- **Priority 1**: Add error scenario testing for critical business logic
- **Priority 2**: Implement async operation testing with proper utilities
- **Priority 3**: Expand GraphQL test coverage for all CRUD operations
- **Priority 4**: Add edge case validation tests

### 🔴 Low Coverage (40-59%)

**Characteristics**:

- Minimal testing present, usually only basic happy path scenarios
- Missing critical business logic tests
- No error scenario coverage
- Async operations completely untested
- High risk for production issues

**Evidence Required**:

- Very few tests found, possibly outdated or incomplete
- No comprehensive test strategy visible
- Missing test utilities and proper setup

**Recommended Actions**:

- **URGENT**: Implement basic GraphQL tests for core CRUD operations
- **URGENT**: Add Mocha tests for critical business logic and error scenarios
- **HIGH**: Establish proper test structure and utilities
- **HIGH**: Add async operation testing infrastructure
- **MEDIUM**: Create comprehensive test plan for full coverage

### ❌ No Coverage (0-39%)

**Characteristics**:

- No meaningful tests found or tests are completely outdated
- Critical functionality completely untested
- Extremely high risk for production issues
- No test infrastructure in place

**Evidence Required**:

- No test files found or empty test files
- No evidence of any testing strategy

**Recommended Actions**:

- **CRITICAL**: Immediate implementation of basic GraphQL tests
- **CRITICAL**: Essential Mocha tests for core business logic
- **CRITICAL**: Establish test infrastructure and utilities
- **URGENT**: Risk assessment and prioritization of critical functionality
- **URGENT**: Comprehensive test plan development

## Coverage Analysis Process

### 1. Initial Assessment

**Search for Existing Tests**:

```bash
# Find GraphQL tests
file_search "**/test/graphql/**"

# Find Mocha unit tests
file_search "**/*.test.ts"

# Search for test utilities
grep_search "describe|it|expect" --isRegexp=true
```

**Document Current State**:

- List all existing test files
- Identify test types (GraphQL vs Mocha)
- Note test utilities and patterns used
- Assess test quality and maintenance

### 2. Gap Identification

**CRUD Operation Analysis**:

- ✅ Create operations covered
- ❌ Read operations missing
- ✅ Update operations covered
- ❌ Delete operations untested

**Business Logic Analysis**:

- ✅ Property validation tested
- ❌ Calculated fields untested
- ✅ Business rules covered
- ❌ Complex workflows untested

**Integration Analysis**:

- ✅ Database operations covered
- ❌ External API calls untested
- ❌ Message queue processing missing
- ❌ Async operations untested

**Error Scenario Analysis**:

- ❌ Input validation errors untested
- ❌ Business rule violations missing
- ❌ System error handling untested
- ❌ Edge cases not covered

### 3. Priority Assessment

**Critical Gaps** (Immediate attention required):

- Missing error scenario testing
- Untested async operations
- Core business logic without validation
- Integration points without verification

**Important Gaps** (Near-term implementation):

- Incomplete CRUD operation coverage
- Missing edge case testing
- Limited integration testing
- Performance-related scenarios

**Supplementary Gaps** (Future enhancement):

- Additional happy path scenarios
- Enhanced error message validation
- Performance benchmarking
- Load testing scenarios

### 4. Implementation Strategy

**Phase 1: Critical Foundation** (Week 1):

1. Implement basic GraphQL CRUD tests
2. Add essential Mocha error scenario tests
3. Establish async operation testing utilities
4. Create proper test setup and teardown

**Phase 2: Business Logic Coverage** (Week 2-3):

1. Comprehensive business logic testing
2. Integration point verification
3. Error handling validation
4. Edge case identification and testing

**Phase 3: Comprehensive Coverage** (Week 4+):

1. Performance testing implementation
2. Advanced scenario coverage
3. Regression testing establishment
4. Documentation and maintenance procedures

## Best Practices for Coverage Analysis

### Pattern Search Requirements

**MANDATORY Before Test Suggestions**:

1. **Search for Existing Patterns**:

    ```bash
    # Find similar node tests
    grep_search "describe.*[NodeName]" --isRegexp=true

    # Find GraphQL static test examples
    file_search "**/test/graphql/**/request.graphql"

    # Find GraphQL test examples
    file_search "**/test/graphql/**/request.graphql"
    ```

2. **Analyze Current Coverage**:
    - Document existing test files and their purpose
    - Identify test patterns and utilities used
    - Assess test quality and maintenance level

3. **Reference Proven Approaches**:
    - Use existing test utilities and helpers
    - Follow established patterns for similar nodes
    - Maintain consistency with codebase standards

### Coverage Reporting Format

```markdown
## 📊 Standardized Coverage Calculation

### Component Analysis

| Component          | Weight   | Coverage   | Score      |
| ------------------ | -------- | ---------- | ---------- |
| CRUD Operations    | 25%      | 85%        | 21.25      |
| Business Logic     | 35%      | 70%        | 24.50      |
| Integration Points | 20%      | 80%        | 16.00      |
| Error Handling     | 20%      | 60%        | 12.00      |
| **TOTAL**          | **100%** | **73.75%** | **Medium** |

### Gap Analysis

**Critical Missing Tests:**

- [List specific missing error scenarios]
- [List untested async operations]

**Important Missing Tests:**

- [List incomplete CRUD coverage]
- [List missing business logic tests]

**Supplementary Tests:**

- [List additional happy path scenarios]
- [List performance testing opportunities]
```

## Usage Guidelines

### When to Perform Coverage Analysis

1. **Before Adding New Tests**: Understand existing coverage to avoid duplication
2. **During Code Review**: Assess test coverage for new functionality
3. **Sprint Planning**: Identify testing priorities and effort estimation
4. **Maintenance Cycles**: Regular assessment of test quality and coverage
5. **Production Issues**: Analyze coverage gaps that led to bugs

### Integration with Development Workflow

1. **Pull Request Reviews**: Include coverage analysis in PR descriptions
2. **Sprint Retrospectives**: Review coverage improvements and gaps
3. **Technical Debt Planning**: Prioritize test coverage improvements
4. **Release Planning**: Ensure adequate coverage before major releases

### Continuous Improvement

1. **Coverage Monitoring**: Track coverage trends over time
2. **Pattern Evolution**: Update test patterns based on lessons learned
3. **Tool Enhancement**: Improve coverage analysis automation
4. **Team Training**: Share coverage analysis best practices

## Usage Keywords

Trigger coverage analysis with:

- "analyze test coverage"
- "coverage analysis for [filename]"
- "test gap analysis"
- "calculate coverage percentage"
- "coverage assessment"
- "test priority analysis"
- "coverage calculation"
- "standardized coverage"
