# Actions/Server-Side Testing TODOs

## Overview
Testing gaps in server-side actions that handle core business logic and data operations.

---

## 🔴 High Priority Items

### actions-fulfill-001: Complete fulfillCheckout.ts testing for payment processing edge cases
**File Location**: `actions/fulfill-checkout.test.ts` (enhance existing)
**Current Coverage**: ~70% - Missing critical payment edge cases
**Impact**: Critical - Payment processing errors affect revenue and customer satisfaction
**Estimated Effort**: 28 hours

**Specific Tasks**:

#### Payment Processing Edge Cases
- [ ] Test partial payment scenarios
- [ ] Test refund processing workflows
- [ ] Test chargeback handling
- [ ] Test payment timeout scenarios
- [ ] Test insufficient inventory handling
- [ ] Test payment method failures

#### Data Consistency Testing
- [ ] Test order creation with partial data
- [ ] Test address validation failures
- [ ] Test customer creation with orders
- [ ] Test inventory updates consistency
- [ ] Test database transaction rollbacks

#### Stripe Integration Testing
- [ ] Test corrupted Stripe session data
- [ ] Test webhook replay attacks
- [ ] Test invalid payment intents
- [ ] Test expired checkout sessions
- [ ] Test malformed webhook payloads

**Critical Test Cases Needed**:
```typescript
describe('fulfillCheckout Edge Cases', () => {
  test('should handle partial payment scenarios');
  test('should process refunds correctly');
  test('should handle inventory shortages');
  test('should validate address data properly');
  test('should maintain data consistency');
  test('should handle Stripe API failures');
  test('should prevent webhook replay attacks');
});
```

---

### actions-settings-001: Add settings-additions.ts testing and duplicate CRUD cleanup
**File Location**: `actions/settings-additions.test.ts` (new file)
**Current State**: No tests for duplicate CRUD operations
**Impact**: High - Code duplication and potential maintenance issues
**Estimated Effort**: 16 hours

**Specific Tasks**:
- [ ] Test all CRUD operations in settings-additions
- [ ] Identify and document duplicate functionality
- [ ] Refactor duplicate code (remove duplicates)
- [ ] Test refactored functionality
- [ ] Test settings validation
- [ ] Test settings permissions
- [ ] Test settings caching behavior

**Cleanup Required**:
```typescript
// Duplicate CRUD operations identified:
- Customer CRUD (exists in customer.ts and customers.ts)
- Order management (partial duplication)
- Settings operations (scattered across files)

// Need to:
1. Consolidate duplicate functions
2. Update all references
3. Add comprehensive tests
4. Ensure consistent error handling
```

---

### actions-trans-001: Implement transaction rollback testing for all actions
**File Location**: Multiple action test files (enhance existing)
**Current State**: No transaction testing in action tests
**Impact**: Critical - Data integrity could be compromised
**Estimated Effort**: 24 hours

**Specific Tasks**:
- [ ] Test database transaction begin/commit/rollback
- [ ] Test partial operation failures
- [ ] Test concurrent operation conflicts
- [ ] Test deadlock scenarios
- [ ] Test connection timeout handling
- [ ] Test memory pressure scenarios
- [ ] Test long-running transaction handling

**Transaction Test Framework**:
```typescript
describe('Database Transactions', () => {
  test('should rollback on create operation failure');
  test('should rollback on update operation failure');
  test('should rollback on delete operation failure');
  test('should handle concurrent operations');
  test('should timeout long transactions');
});
```

---

### actions-constraints-001: Add comprehensive constraint violation and database integrity tests
**File Location**: Multiple action test files (enhance existing)
**Current State**: No constraint testing in action tests
**Impact**: Critical - Database integrity violations could corrupt data
**Estimated Effort**: 20 hours

**Specific Tasks**:
- [ ] Test foreign key constraint violations
- [ ] Test unique constraint violations
- [ ] Test check constraint violations
- [ ] Test cascade delete operations
- [ ] Test circular reference prevention
- [ ] Test data type constraints
- [ ] Test null/empty value constraints

**Constraint Test Cases**:
```typescript
describe('Database Constraints', () => {
  test('should enforce foreign key constraints');
  test('should enforce unique constraints');
  test('should enforce check constraints');
  test('should handle cascade deletes correctly');
  test('should prevent circular references');
});
```

---

### actions-security-001: Implement role-based access control and permission testing
**File Location**: Multiple action test files (enhance existing)
**Current State**: No RBAC testing in actions
**Impact**: Critical - Unauthorized access to sensitive data
**Estimated Effort**: 32 hours

**Specific Tasks**:
- [ ] Test user role validation in all actions
- [ ] Test cross-tenant data access prevention
- [ ] Test admin-only operations protection
- [ ] Test resource ownership validation
- [ ] Test permission escalation prevention
- [ ] Test API endpoint authorization
- [ ] Test data access boundaries

**RBAC Test Framework**:
```typescript
describe('Role-Based Access Control', () => {
  test('should restrict admin operations to admins');
  test('should prevent cross-user data access');
  test('should validate resource ownership');
  test('should handle permission escalation attempts');
  test('should enforce tenant isolation');
});
```

---

### actions-security-002: Add rate limiting and brute force protection testing
**File Location**: Multiple action test files (enhance existing)
**Current State**: No rate limiting implementation or testing
**Impact**: Critical - Application vulnerable to abuse and attacks
**Estimated Effort**: 24 hours

**Specific Tasks**:
- [ ] Implement rate limiting middleware
- [ ] Test login attempt rate limiting
- [ ] Test API endpoint rate limiting
- [ ] Test distributed rate limiting
- [ ] Test rate limit bypass attempts
- [ ] Test rate limit recovery
- [ ] Test memory-efficient rate limiting

**Rate Limiting Test Cases**:
```typescript
describe('Rate Limiting', () => {
  test('should limit login attempts');
  test('should limit API requests');
  test('should handle distributed requests');
  test('should prevent rate limit bypass');
  test('should reset rate limits properly');
});
```

---

## Missing Action Files Testing

### High Priority Files Without Tests
1. **`actions/orders.ts`** - Order management logic
2. **`actions/order-items.ts`** - Order item operations
3. **`actions/customer-address.ts`** - Address management
4. **`actions/fulfill-checkout.ts`** - Payment processing (partial tests exist)

### Medium Priority Files With Incomplete Tests
1. **`actions/catalog.ts`** - Product catalog operations (543 lines, ~80% coverage)
2. **`actions/customers.ts`** - Customer management (basic tests exist)
3. **`actions/settings.ts`** - Settings management (basic CRUD tests)

---

## Testing Strategy

### Action Test Structure
```typescript
describe('ActionName', () => {
  describe('Basic Functionality', () => {
    test('should create/read/update/delete successfully');
    test('should handle valid inputs correctly');
    test('should return expected outputs');
  });

  describe('Input Validation', () => {
    test('should validate required fields');
    test('should sanitize input data');
    test('should handle malformed inputs');
  });

  describe('Error Handling', () => {
    test('should handle database errors');
    test('should handle network failures');
    test('should provide meaningful error messages');
  });

  describe('Security', () => {
    test('should validate user permissions');
    test('should prevent unauthorized access');
    test('should handle malicious inputs');
  });

  describe('Performance', () => {
    test('should execute within time limits');
    test('should handle concurrent requests');
    test('should use database indexes efficiently');
  });

  describe('Data Integrity', () => {
    test('should maintain database constraints');
    test('should handle transactions correctly');
    test('should ensure data consistency');
  });
});
```

### Test Data Management
```typescript
// Action test data factories
export const createActionTestData = () => ({
  user: createTestUser(),
  product: createTestProduct(),
  order: createTestOrder(),
  // ... other test data
});

// Transaction test helper
export const withTransaction = async (testFn: () => Promise<void>) => {
  await db.query('BEGIN');
  try {
    await testFn();
    await db.query('ROLLBACK'); // Always rollback in tests
  } catch (error) {
    await db.query('ROLLBACK');
    throw error;
  }
};
```

---

## Implementation Priorities

### Phase 1: Critical Business Logic (Week 1-2)
1. **Payment Processing** (actions-fulfill-001) - Revenue critical
2. **Transaction Testing** (actions-trans-001) - Data integrity
3. **Constraint Testing** (actions-constraints-001) - Data validation

### Phase 2: Security & Access Control (Week 2-3)
4. **RBAC Implementation** (actions-security-001) - Access control
5. **Rate Limiting** (actions-security-002) - Attack prevention
6. **Settings Cleanup** (actions-settings-001) - Code maintenance

### Phase 3: Comprehensive Coverage (Week 3-4)
7. **Missing Action Tests** - Complete coverage
8. **Integration Testing** - Cross-action workflows
9. **Performance Testing** - Optimization validation

---

## Success Metrics

### Action Test Coverage Targets
- **Payment Actions**: 95%+ coverage
- **CRUD Actions**: 90%+ coverage
- **Security Tests**: 100% coverage
- **Transaction Tests**: 100% coverage
- **Error Handling**: 95%+ coverage

### Quality Gates
- No untested critical actions
- All database operations have transaction tests
- All security-sensitive actions have RBAC tests
- All public APIs have rate limiting tests

---

## Notes for Implementation

1. **Database Isolation**: Use transactions and rollback for test isolation
2. **Security Focus**: Prioritize testing of all security-sensitive operations
3. **Performance Testing**: Include execution time assertions in action tests
4. **Error Simulation**: Use dependency injection to simulate failure scenarios
5. **Integration Testing**: Test action workflows, not just individual operations

This comprehensive action testing plan ensures all server-side business logic is properly validated, secure, and maintains data integrity under all conditions.