import { Test } from '@nestjs/testing'; import { AppService } from './app.service'; import { Message } from '@chat-room/api-interfaces'; describe('AppService', () => { let service: AppService; beforeAll(async () => { const app = await Test.createTestingModule({ providers: [AppService], }).compile(); service = app.get(AppService); }); describe('addMessage', () => { it('should return message', () => { const message: Message = { creationDate: new Date().toISOString(), message: 'Test message', user: 'Test User', color: 'Test color', }; expect(service.addMessage(message)).toBe(message); }); }); });