koa/supertest - server.close 不是函数答案

【问题标题】：koa/supertest - server.close is not a functionkoa/supertest - server.close 不是函数
【发布时间】：2020-06-18 15:00:49
【问题描述】：

我看过以前的帖子，问题是您需要导出实例才能在服务器上调用close()。我已经尝试过了，但是我仍然收到该错误

index.ts

import * as Koa from "koa"
import * as logger from "koa-logger"
import * as json from "koa-json"
import * as bodyParser from "koa-bodyparser"
import * as cors from "koa-cors"
import errorHandler from "./middlewares/errorhandler.middleware"
import router from "./routes"

const PORT = process.env.PORT || 3000;
const ENV = process.env.NODE_ENV || 'development';
const app = new Koa()

app
    .use(logger())
    .use(bodyParser())
    .use(errorHandler)
    .use(router.routes())
    .use(router.allowedMethods())
    .use(json())
    .use(cors())


    export const server = app.listen(PORT, (): void => console.log(`???? Server listening on port ${PORT} - ${ENV} environment`))

我也尝试过不同的导出方式

const appServer = app.listen(...)
export default appServer

测试文件

const request = require('supertest');
const server = require('../index');
beforeAll(async () => {
 // do something before anything else runs
 console.log('Jest starting!');
});
// close the server after each test
afterAll(() => {
 server.close();
 console.log('server closed!');
});
describe('basic route tests', () => {
 test('get home route GET /', async () => {
 const response = await request(server).get('/');
 expect(response.status).toEqual(200);
 expect(response.text).toContain('Hello World!');
 });
});

另外，如果我将 const server = require("../index.ts") 语句更改为导入，则会收到错误消息：Property 'close' does not exist on type 'typeof import("/Users/path/to/file/")

所以这也可能是问题的一部分。

【问题讨论】：

标签： node.js jestjs koa2

【解决方案1】：

在测试文件中更改导入

import {server} from "../index"

【讨论】：