import { Test, TestingModule } from '@nestjs/testing'; import { INestApplication } from '@nestjs/common'; import { FastifyAdapter } from '@nestjs/platform-fastify'; import * as request from 'supertest'; import { AppModule } from './../src/app.module'; describe('AppController (e2e)', () => { let app: INestApplication; beforeEach(async () => { const moduleFixture: TestingModule = await Test.createTestingModule({ imports: [AppModule], }).compile(); app = moduleFixture.createNestApplication( new FastifyAdapter(), ); await app.init(); await app.getHttpAdapter().getInstance().ready(); }); afterEach(async () => { await app.close(); }); // Since we don't have a root route, we can try to hit docs or a known route if any. // Or check if the app initializes correctly. it('should initialize', () => { expect(app).toBeDefined(); }); });