import { Test, TestingModule } from "@nestjs/testing"; import { AppController } from "./app.controller"; import { AppService } from "./app.service"; describe("AppController", () => { let appController: AppController; beforeEach(async () => { const app: TestingModule = await Test.createTestingModule({ controllers: [AppController], providers: [AppService], }).compile(); appController = app.get(AppController); }); describe("root", () => { it('should return "Hello World!"', () => { expect(appController.getHello()).toBe("Hello World!"); }); }); });