# Code Coverage Report - Session #46

**Generated:** 2025-11-18
**Test Suite:** 30 tests across 5 test files
**Overall Coverage:** 39% (with system libs), 32% (Web4 code only)

---

## Summary

### Coverage by Component

| Component | Statements | Missed | Coverage | Priority |
|-----------|-----------|--------|----------|----------|
| **Core Energy System** |
| energy_capacity.py | 315 | 93 | **70%** | ✅ Good |
| energy_backed_atp.py | 256 | 102 | **60%** | ✅ Good |
| energy_backed_identity_bond.py | 228 | 131 | **43%** | ⚠️ Medium |
| **Security & Trust** |
| security_mitigations.py | 246 | 105 | **57%** | ✅ Good |
| trust_based_energy_priority.py | 214 | 91 | **57%** | ✅ Good |
| trust_ceiling_mitigation.py | 142 | 123 | **13%** | 🔴 Needs Work |
| cross_society_security_mitigations.py | 319 | 272 | **15%** | 🔴 Needs Work |
| **Cross-Society Coordination** |
| cross_society_messaging.py | 221 | 170 | **23%** | 🔴 Needs Work |
| cross_society_atp_exchange.py | 285 | 202 | **29%** | ⚠️ Medium |
| cross_society_trust_propagation.py | 239 | 194 | **19%** | 🔴 Needs Work |
| **Advanced Features** |
| energy_based_sybil_resistance.py | 140 | 117 | **16%** | 🔴 Needs Work |
| hardened_energy_system.py | 169 | 129 | **24%** | ⚠️ Medium |
| integrated_society_node.py | 236 | 177 | **25%** | ⚠️ Medium |
| web_of_trust.py | 329 | 264 | **20%** | 🔴 Needs Work |
| web4_crypto.py | 163 | 130 | **20%** | 🔴 Needs Work |
| **Legacy/Support** |
| gaming_mitigations.py | 368 | 275 | **25%** | ⚠️ Medium |
| phase1_extended_mitigations.py | 198 | 163 | **18%** | 🔴 Needs Work |
| reputation_atp_integration.py | 246 | 194 | **21%** | 🔴 Needs Work |

---

## Analysis

### Well-Tested Components (>50% coverage)

**energy_capacity.py (70%)**
- Good coverage of core energy proof validation
- Solar panel proof creation/validation
- Compute resource proof creation/validation
- Energy capacity registry operations

**energy_backed_atp.py (60%)**
- ATP charging/discharging flow tested
- Work ticket creation and validation
- Thermodynamic decay mechanisms

**security_mitigations.py (57%)**
- Basic security checks tested
- Vouching mechanics validated

**trust_based_energy_priority.py (57%)**
- Trust-weighted priority allocation
- Energy pool management

### Under-Tested Components (<30% coverage)

**Critical Security Components:**

1. **trust_ceiling_mitigation.py (13%)** 🔴
   - **Issue:** Trust ceiling enforcement barely tested
   - **Risk:** Critical for preventing Sybil collusion
   - **Need:** Tests for ceiling calculation, enforcement

2. **cross_society_security_mitigations.py (15%)** 🔴
   - **Issue:** Most security features untested
   - **Note:** Session #45 added Sybil wash trading tests, but much code still uncovered
   - **Need:** Tests for rate limiting, price volatility, size limits

3. **energy_based_sybil_resistance.py (16%)** 🔴
   - **Issue:** Sybil detection algorithms barely tested
   - **Risk:** Core anti-Sybil mechanism needs validation
   - **Need:** Tests for energy weighting, cluster aggregation

**Cross-Society Coordination:**

4. **cross_society_trust_propagation.py (19%)** 🔴
   - **Issue:** Trust propagation logic minimally tested
   - **Risk:** Multi-hop trust calculation uncovered
   - **Need:** Tests for decay, propagation distance, aggregation

5. **cross_society_messaging.py (23%)** 🔴
   - **Issue:** Message routing and validation undertested
   - **Risk:** Message bus is critical infrastructure
   - **Need:** Tests for message types, validation, routing

6. **web4_crypto.py (20%)** 🔴
   - **Issue:** Cryptographic primitives barely tested
   - **Risk:** Security foundation needs thorough validation
   - **Need:** Tests for key generation, signing, verification

**Integration:**

7. **integrated_society_node.py (25%)** ⚠️
   - **Note:** Session #45 added E2E test, but only covers happy path
   - **Need:** Tests for error cases, edge conditions, failure modes

---

## Recommendations

### Priority 1: Security Components (Critical)

**Target:** 80%+ coverage for security-critical code

**Actions:**
1. Add trust ceiling tests (`trust_ceiling_mitigation.py`)
   - Test ceiling calculation algorithm
   - Test diversity discount application
   - Test outlier detection

2. Expand security mitigation tests (`cross_society_security_mitigations.py`)
   - Test all rate limiting scenarios
   - Test price volatility limits
   - Test order size validation
   - Test Sybil isolation integration

3. Test Sybil detection (`energy_based_sybil_resistance.py`)
   - Test coefficient of variation calculation
   - Test cluster aggregation
   - Test energy weighting

### Priority 2: Cross-Society Infrastructure

**Target:** 60%+ coverage for coordination code

**Actions:**
1. Test trust propagation (`cross_society_trust_propagation.py`)
   - Multi-hop scenarios
   - Decay factor application
   - Aggregation logic

2. Test messaging (`cross_society_messaging.py`)
   - All message types
   - Validation rules
   - Routing logic

3. Test cryptography (`web4_crypto.py`)
   - Key generation determinism
   - Signature creation/verification
   - Error handling

### Priority 3: Integration & Error Paths

**Target:** 50%+ coverage for integration code

**Actions:**
1. Expand integrated node tests
   - Error recovery
   - Component failure handling
   - Edge cases

2. Test marketplace exchange logic
   - Order matching algorithms
   - Price discovery
   - Settlement

---

## Coverage Gaps by Category

### Untested Features

**Trust System:**
- Multi-source trust aggregation
- Trust disagreement resolution
- Outlier filtering in trust scores

**Security:**
- Circular vouching detection (partial)
- Identity-energy linking edge cases
- Global registry reuse prevention (partial)

**Marketplace:**
- Complex order matching
- Multi-currency exchanges
- Partial fill handling

**Energy System:**
- Battery proof validation
- Grid power proof validation
- Device spec edge cases

### Error Handling

**Missing Coverage:**
- Invalid energy proofs
- Malformed messages
- Byzantine behavior
- Network failures
- Resource exhaustion

### Edge Cases

**Not Tested:**
- Zero-capacity energy sources
- Expired proofs
- Contradictory trust signals
- Very large orders
- Very high message rates

---

## Test File Coverage

### Existing Test Files

1. **test_attacks_with_mitigations.py** (3 tests)
   - Covers: Attack scenarios A2, A3, E1
   - Good: Demonstrates mitigations work

2. **test_energy_backed_atp_integration.py** (18 tests)
   - Covers: Core ATP flow
   - Good: Comprehensive energy/ATP testing

3. **test_api_standardization.py** (6 tests)
   - Covers: Component initialization
   - Good: Validates factory patterns

4. **test_integrated_society_node_e2e.py** (5 tests)
   - Covers: Integration happy paths
   - Good: Validates full stack works

5. **test_sybil_wash_trading_detection.py** (4 tests)
   - Covers: Wash trading detection layers
   - Good: Multi-layer security validation

**Total:** 36 test functions (some run multiple scenarios)

### Recommended New Test Files

1. **test_trust_ceiling.py**
   - Trust ceiling calculation
   - Diversity discount
   - Outlier detection

2. **test_cross_society_trust_propagation.py**
   - Multi-hop trust
   - Decay application
   - Aggregation logic

3. **test_cryptographic_primitives.py**
   - Key generation
   - Signing/verification
   - Error cases

4. **test_message_bus_comprehensive.py**
   - All message types
   - Rate limiting edge cases
   - Replay protection

5. **test_marketplace_complex_scenarios.py**
   - Multi-order matching
   - Price discovery
   - Partial fills

6. **test_error_recovery.py**
   - Component failures
   - Byzantine behavior
   - Resource limits

---

## HTML Coverage Report

Detailed line-by-line coverage available in:
```
htmlcov/index.html
```

View in browser to see:
- Exact lines covered/missed
- Function-level coverage
- Branch coverage (if enabled)

---

## Next Steps (Session #46)

1. ✅ **Coverage measurement complete** (this report)
2. ⏭️ **Create high-priority tests** (trust ceiling, Sybil detection)
3. ⏭️ **Expand security test coverage** (rate limiting, crypto)
4. ⏭️ **Add error path tests** (failure recovery, edge cases)

**Goal:** Reach 60%+ overall coverage by end of session
**Stretch Goal:** 80%+ for security-critical components
