feature: make typescript starter more robust

src/app.controller.spec.ts

@@ -0,0 +1,20 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { INestApplication } from '@nestjs/common';
+import { AppController } from './app.controller';
+
+describe('AppController', () => {
+  let app: TestingModule;
+
+  beforeAll(async () => {
+    app = await Test.createTestingModule({
+      controllers: [AppController],
+    }).compile();
+  });
+
+  describe('root', () => {
+    it('should return "Hello World!"', () => {
+      const appController = app.get<AppController>(AppController);
+      expect(appController.root()).toBe('Hello World!');
+    });
+  });
+});

src/app.controller.ts

@@ -2,8 +2,8 @@ import { Get, Controller } from '@nestjs/common';
 
 @Controller()
 export class AppController {
-	@Get()
-	root(): string {
+  @Get()
+  root(): string {
     return 'Hello World!';
   }
 }

src/app.module.ts

@@ -6,4 +6,4 @@ import { AppController } from './app.controller';
   controllers: [AppController],
   components: [],
 })
-export class ApplicationModule {}
+export class AppModule {}

src/main.ts

@@ -1,8 +1,8 @@
 import { NestFactory } from '@nestjs/core';
-import { ApplicationModule } from './app.module';
+import { AppModule } from './app.module';
 
 async function bootstrap() {
-	const app = await NestFactory.create(ApplicationModule);
-	await app.listen(3000);
+  const app = await NestFactory.create(AppModule);
+  await app.listen(3000);
 }
 bootstrap();

src/modules/app.spec.ts

@@ -1,25 +0,0 @@
-import express from 'express';
-import request from 'supertest';
-import { Test } from '@nestjs/testing';
-import { ApplicationModule } from './app.module';
-
-describe('Basic E2E Test', () => {
-  const server = express();
-
-  beforeAll(async () => {
-    const module = await Test.createTestingModule({
-            modules: [ApplicationModule]
-          })
-          .compile();
-
-    const app = module.createNestApplication(server);
-    await app.init();
-  });
-
-  it('/GET /', () => {
-    return request(server)
-            .get('/')
-            .expect(200)
-            .expect('Hello World!');
-  });
-});