在使用chai-http和Jest进行测试时，如何从我的API返回响应

2w2cym1i 于 2023-10-14 发布在 Jest

关注(0)|答案(2)|浏览(180)

我正在尝试使用以下代码测试我的节点API索引端点

index.test.js

const chai = require('chai')
const chaiHttp = require('chai-http')
const server = 'http://localhost:8000'

chai.use(chaiHttp)

describe('set up test', () => {
 it('set up test', () => {
   expect(1).toEqual(1)
 })
})

describe('index route test', () => {
 it('index route test', (done) => {
  const { res } = chai
    .request(server)
    .get('/')
    .end((res) => {
      expect(res.statusCode).toBe(200)
      done()
    })
  console.log(res)
 })

}）
1.我的失败测试'索引路由测试'通过，但它应该失败（解决）。
1.接收的响应未定义（我在控制台中记录）。
我的输出如下：

输出

> jest --forceExit || true

FAIL  tests/index.test.js
 set up test
   ✓ set up test (6 ms)
 index route test
   ✕ gives welcome message (49 ms)

 ● index route test › gives welcome message

   expect(received).toBe(expected) // Object.is equality

   Expected: 200
   Received: undefined

     18 |       .get('/')
     19 |       .end((res) => {
   > 20 |         expect(res.statusCode).toBe(200)
        |                                ^
     21 |         done()
     22 |       })
     23 |     console.log(res)

     at tests/index.test.js:20:32
     at Test.Object.<anonymous>.Request.callback (node_modules/superagent/lib/node/index.js:728:3)
     at ClientRequest.<anonymous> (node_modules/superagent/lib/node/index.js:647:10)

 console.log
   undefined

     at Object.<anonymous> (tests/index.test.js:23:13)

Test Suites: 1 failed, 1 total
Tests:       1 failed, 1 passed, 2 total
Snapshots:   0 total
Time:        1.63 s, estimated 2 s
Ran all test suites.
Force exiting Jest: Have you considered using `--detectOpenHandles` to detect async operations that kept running after all tests finished?

我如何返回响应？

jestjs

来源：https://stackoverflow.com/questions/65598586/how-can-i-return-the-response-from-my-api-when-testing-with-chai-http-and-jest

2条答案

按热度按时间

332nm8kg1#

我没有得到任何响应通过传递应用程序的URL到服务器变量。因此，我将语法更改为ES6 import而不是require，并使用app模块而不是chai-http文档中的应用程序服务器URL
所以我的代码结构过渡到

import chai from 'chai'
import chaiHttp from 'chai-http'
import server from '../app'

chai.use(chaiHttp)

describe('set up test', () => {
  it('set up test', () => {
   expect(1).toEqual(1)
  })
})

describe('index route test', () => {
  it('gives welcome message', (done) => {
    chai
     .request(server)
     .get('/')
     .then((res) => {
       expect(res.statusCode).toBe(200)
       done()
     })
   })
})

这样，我就可以捕获响应并对其运行检查。我的测试通过了。输出为：

> jest --forceExit || true

PASS  tests/index.test.js
 set up test
   ✓ set up test (4 ms)
 index route test
   ✓ gives welcome message (77 ms)

 console.log
   Application Server is up and running on port 8000

     at Server.<anonymous> (app.js:43:11)

Test Suites: 1 passed, 1 total
Tests:       2 passed, 2 total
Snapshots:   0 total
Time:        3.189 s
Ran all test suites.
Force exiting Jest: Have you considered using `--detectOpenHandles` to detect async operations that kept running after all tests finished?

赞(0）回复(0）举报 2023-10-14

w8f9ii692#

accepted answer有点笨拙，混合了promise和done()，可以稍微清理一下。这里有一个改进，专门使用promise并使用async/await将回调平坦化，以将Assert降低到顶层：

describe('index route test', () => {
  it('gives welcome message', async () => {
    const response = await chai.request(server).get('/');
    expect(response.statusCode).toBe(200);
  });
});

此外，require与import应该没有关系。

赞(0）回复(0）举报 2023-10-14

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在使用chai-http和Jest进行测试时，如何从我的API返回响应

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