docs: move additional exploration docs to docs/audits/
Move 6 recently generated inquiry and MCP exploration documents to the centralized audit directory. Co-Authored-By: Paperclip <noreply@paperclip.ing>
This commit is contained in:
Ho Ngoc Hai
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docs/audits/MCP_MODULE_EXPLORATION_2.md
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docs/audits/MCP_MODULE_EXPLORATION_2.md
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# MCP Module Exploration - GoodGo Platform
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## 1. MODULE STRUCTURE & SOURCE FILES
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### Directory Structure
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```
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apps/api/src/modules/mcp/
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├── index.ts
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├── mcp.module.ts
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└── presentation/
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├── mcp-transport.controller.ts
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└── __tests__/
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└── mcp-transport.controller.spec.ts
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```
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### All Source Files (4 files)
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#### 1. **apps/api/src/modules/mcp/index.ts**
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- **Type**: Module entry point (exports)
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- **Lines**: 1
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- **Purpose**: Exports the McpIntegrationModule
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- **Exports**: `{ McpIntegrationModule }`
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#### 2. **apps/api/src/modules/mcp/mcp.module.ts**
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- **Type**: NestJS Module configuration (22 lines)
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- **Key Class**: `McpIntegrationModule implements OnModuleInit`
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- **Responsibility**:
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- Sets up MCP core module with configuration
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- Initializes TypesenseClient for MCP registry
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- Logs initialized server names on module init
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- **Dependencies Injected**:
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- `TypesenseClientService` (from SearchModule)
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- `McpRegistryService` (from @goodgo/mcp-servers)
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- `LoggerService` (from SharedModule)
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- **Imports**: SearchModule, AuthModule, McpCoreModule.forRoot()
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- **Controllers**: McpTransportController
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- **Lifecycle**: Implements `onModuleInit()`
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#### 3. **apps/api/src/modules/mcp/presentation/mcp-transport.controller.ts**
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- **Type**: NestJS Controller (102 lines)
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- **Key Class**: `McpTransportController`
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- **Responsibility**: HTTP transport layer for MCP SSE connections
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- **Decorators**: @ApiTags, @ApiBearerAuth, @Controller, @UseGuards(JwtAuthGuard)
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- **Properties**: `transports: Map<string, SSEServerTransport>` (session management)
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- **Injected**: `registry: McpRegistryService`
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**Endpoints:**
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1. **GET /mcp/servers** - List available MCP servers (Throttle: 30/60s)
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2. **GET /mcp/:serverName/sse** - Open SSE connection (Throttle: 5/60s, stricter)
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3. **POST /mcp/:serverName/messages** - Send message to session (Throttle: 30/60s)
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#### 4. **apps/api/src/modules/mcp/presentation/__tests__/mcp-transport.controller.spec.ts**
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- **Type**: Unit Test Suite (174 lines)
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- **Framework**: Vitest
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- **Tests**: 11 total in 4 describe blocks
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- **Coverage**: Security decorators, listServers, handleSse, handleMessage
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## 2. TEST FILES SUMMARY
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### Total: 1 test file (174 lines)
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**File**: `mcp-transport.controller.spec.ts`
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- **Suites**: 4 describe blocks
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- **Total Tests**: 11
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- **Status**: ✅ Well tested
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- **Coverage**: Controller endpoints, security, error handling
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## 3. DDD LAYER STRUCTURE
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**Current Status**: SIMPLIFIED (Presentation-only)
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### ✅ What EXISTS:
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- **Presentation Layer**
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- `presentation/mcp-transport.controller.ts` (102 lines)
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- `presentation/__tests__/mcp-transport.controller.spec.ts` (174 lines)
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### ❌ What DOES NOT EXIST:
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- **Domain Layer** - No entities, value objects, events
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- **Application Layer** - No handlers, commands, queries
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- **Infrastructure Layer** - No repositories, adapters
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### Architecture Notes:
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- Acts as integration wrapper for @goodgo/mcp-servers
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- Simple HTTP-to-SSE bridge
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- In-memory session tracking via Map
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- No business logic or persistence
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## 4. KEY CLASSES/HANDLERS
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### McpIntegrationModule
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- **Status**: ⚠️ Partially tested
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- **Methods**: constructor, onModuleInit()
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- **Tests Needed**: Module initialization, service integration
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### McpTransportController
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- **Status**: ✅ Well tested
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- **Methods**: listServers(), handleSse(), handleMessage()
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- **Tests**: 11 comprehensive tests covering all methods
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## 5. TESTING PATTERNS FROM OTHER MODULES
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### Pattern 1: Auth Module (Simple Handler)
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```typescript
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describe('LoginUserHandler', () => {
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let handler: LoginUserHandler;
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let mockTokenService = { generateTokenPair: vi.fn() };
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beforeEach(() => {
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handler = new LoginUserHandler(mockTokenService as any);
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});
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it('generates token pair', async () => {
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mockTokenService.generateTokenPair.mockResolvedValue(tokenPair);
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const result = await handler.execute(command);
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expect(result).toEqual(tokenPair);
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});
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});
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```
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### Pattern 2: Payments Module (Complex Handler)
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```typescript
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describe('CreatePaymentHandler', () => {
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let handler: CreatePaymentHandler;
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let mockPaymentRepo: { [K in keyof IPaymentRepository]: ReturnType<typeof vi.fn> };
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let mockGatewayFactory: { getGateway: ReturnType<typeof vi.fn> };
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beforeEach(() => {
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mockPaymentRepo = {
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findById: vi.fn(),
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save: vi.fn().mockResolvedValue(undefined),
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};
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handler = new CreatePaymentHandler(mockPaymentRepo as any, mockGatewayFactory as any);
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});
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it('creates payment successfully', async () => {
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const result = await handler.execute(command);
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expect(result.paymentId).toBeDefined();
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expect(mockPaymentRepo.save).toHaveBeenCalledTimes(1);
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});
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});
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```
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### Pattern 3: Domain Entity Testing
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```typescript
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import { describe, it, expect } from 'vitest';
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describe('PaymentEntity', () => {
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it('should create payment with events', () => {
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const payment = PaymentEntity.createNew(...);
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expect(payment.status).toBe('PENDING');
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expect(payment.domainEvents).toHaveLength(1);
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expect(payment.domainEvents[0]).toBeInstanceOf(PaymentCreatedEvent);
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});
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});
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```
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### Pattern 4: Infrastructure Service Testing
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```typescript
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describe('ZalopayService', () => {
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let service: ZalopayService;
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beforeEach(() => {
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const mockConfig = {
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get: vi.fn((key) => env[key]),
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getOrThrow: vi.fn((key) => env[key] || throw),
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};
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service = new ZalopayService(mockConfig as any);
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});
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it('should verify valid callback', () => {
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const mac = crypto.createHmac('sha256', key2).update(dataStr).digest('hex');
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const result = service.verifyCallback({ data: dataStr, mac });
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expect(result.isValid).toBe(true);
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});
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});
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```
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## 6. TESTING CONVENTIONS SUMMARY
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### Framework & Setup
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- **Framework**: Vitest
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- **Environment**: Node.js
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- **Globals**: Enabled
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- **File Pattern**: `*.spec.ts`
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- **Test Organization**: `__tests__/` subdirectory
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### Mocking Patterns
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1. **Service Mocks**: `mockService = { method: vi.fn().mockResolvedValue(value) }`
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2. **Module Mocks**: `vi.mock('@goodgo/mcp-servers', () => ({ ... }))`
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3. **Configuration Mocks**: `get: vi.fn((key) => env[key])`
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### Test Structure
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```typescript
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describe('ClassName', () => {
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let instance: ClassName;
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let mockDep1: Mock;
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beforeEach(() => {
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mockDep1 = { method: vi.fn() };
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instance = new ClassName(mockDep1 as any);
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});
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describe('methodName', () => {
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it('happy path', async () => {
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mockDep1.method.mockResolvedValue(expected);
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const result = await instance.method();
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expect(result).toEqual(expected);
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});
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});
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});
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```
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### Test Commands
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```bash
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# Run MCP tests
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pnpm test -- src/modules/mcp
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# Watch mode
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pnpm test -- --watch src/modules/mcp
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# With coverage
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pnpm test -- --coverage src/modules/mcp
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```
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## 7. RECOMMENDATIONS
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### Immediate
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- ✅ Maintain controller test coverage
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- 📝 Add tests for McpIntegrationModule.onModuleInit()
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- 📝 Test module dependency injection
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### Future
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- 🏗️ Add integration tests for full SSE lifecycle
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- 🏗️ If domain logic added, follow payments module pattern
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- 🏗️ If handlers added, use CQRS patterns from auth/payments modules
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