// Mock dependencies jest.mock('../../../../../services/email/core/EmailClient', () => { return jest.fn().mockImplementation(() => ({ initialize: jest.fn().mockResolvedValue(), sendEmail: jest.fn().mockResolvedValue({ success: true, messageId: 'msg-123' }), })); }); jest.mock('../../../../../services/email/core/TemplateManager', () => { return jest.fn().mockImplementation(() => ({ initialize: jest.fn().mockResolvedValue(), renderTemplate: jest.fn().mockResolvedValue('Test'), })); }); jest.mock('../../../../../utils/logger', () => ({ info: jest.fn(), error: jest.fn(), warn: jest.fn(), })); const MessagingEmailService = require('../../../../../services/email/domain/MessagingEmailService'); describe('MessagingEmailService', () => { let service; const originalEnv = process.env; beforeEach(() => { jest.clearAllMocks(); process.env = { ...originalEnv, FRONTEND_URL: 'http://localhost:3000' }; service = new MessagingEmailService(); }); afterEach(() => { process.env = originalEnv; }); describe('initialize', () => { it('should initialize only once', async () => { await service.initialize(); await service.initialize(); expect(service.emailClient.initialize).toHaveBeenCalledTimes(1); expect(service.templateManager.initialize).toHaveBeenCalledTimes(1); }); }); describe('sendNewMessageNotification', () => { const receiver = { firstName: 'John', email: 'john@example.com' }; const sender = { id: 456, firstName: 'Jane', lastName: 'Smith' }; const message = { content: 'Hello, is the power drill still available?', createdAt: '2024-01-15T10:00:00Z', }; it('should send new message notification with correct variables', async () => { const result = await service.sendNewMessageNotification(receiver, sender, message); expect(result.success).toBe(true); expect(service.templateManager.renderTemplate).toHaveBeenCalledWith( 'newMessageToUser', expect.objectContaining({ recipientName: 'John', senderName: 'Jane Smith', messageContent: 'Hello, is the power drill still available?', conversationUrl: 'http://localhost:3000/messages/conversations/456', }) ); expect(service.emailClient.sendEmail).toHaveBeenCalledWith( 'john@example.com', 'New message from Jane Smith', expect.any(String) ); }); it('should use default name when receiver firstName is missing', async () => { const receiverNoName = { email: 'john@example.com' }; await service.sendNewMessageNotification(receiverNoName, sender, message); expect(service.templateManager.renderTemplate).toHaveBeenCalledWith( 'newMessageToUser', expect.objectContaining({ recipientName: 'there' }) ); }); it('should use A user fallback when sender names produce empty string', async () => { const senderEmptyNames = { id: 456, firstName: '', lastName: '' }; await service.sendNewMessageNotification(receiver, senderEmptyNames, message); expect(service.templateManager.renderTemplate).toHaveBeenCalledWith( 'newMessageToUser', expect.objectContaining({ senderName: 'A user' }) ); }); it('should handle errors gracefully', async () => { service.templateManager.renderTemplate.mockRejectedValueOnce(new Error('Template error')); const result = await service.sendNewMessageNotification(receiver, sender, message); expect(result.success).toBe(false); expect(result.error).toBe('Template error'); }); }); });