Question

我目前正在制作带有打字稿，节点，表达和测试的API，并带有jest和supertest。使用Javascript时没有问题，但是最近我将项目文件从JS更改为TS，包括测试文件，并且当我开始测试时，我在超级测试请求部分的所有测试套件中都收到以下错误，这是其中之一当我开始测试时，我在终端上的测试套件。

  TypeError: app.address is not a function

  37 |     it("should return 400 if email is invalid", async () => {
  38 |       const res = await request(server)
> 39 |         .post("/api/users/auth/register")
     |          ^
  40 |         .send({
  41 |           email: "nomail",
  42 |           password: "validpassword123",

这是我的测试文件 auth.test.ts ：

import * as request from 'supertest';
import { User } from '../../../../src/models/User';
import * as mongoose from 'mongoose';
import getKeys from '../../../../src/config/keys';

describe("/api/users/auth", () => {
  let server;
  let accessToken = "Bearer accessToken";
  let email;
  let password;

  beforeAll(async () => {
    server = import('../../../../src/index')
    await mongoose.connect(getKeys().mongoURI);
  })

  afterAll(async () => {
    await server.close();
    await mongoose.disconnect();
  })

  it("should return 400 if email is invalid", async () => {
    const res = await request(server)
      .post("/api/users/auth/register")
      .send({
        email: "nomail",
        password: "validpassword123",
        name: "name"
      });

    expect(res.status).toBe(400);
    expect(res.body).toHaveProperty('errArray')
  });
}

这是我的src / index.ts文件，它是入口点。

import * as express from 'express';
import * as passport from 'passport';
import * as bodyParser from 'body-parser';
import * as path from 'path';
import * as session from 'express-session';
import getKeys from './config/keys';

const port = 3001 || process.env.PORT;
const server = app.listen(port, () =>
  console.log(`Server running on port ${port}`)
);


export default server;

我尝试将导出和导入服务器语法更改为所有commonjs语法，并安装和设置与此相关的所有依赖项，包括@ types / supertest，@ types / jest，ts-jest，这是我的设置 jest.config.js

module.exports = {
  verbose: true,
  testURL: 'http://localhost',
  testEnvironment: "node",
  roots: [
    "<rootDir>"
  ],
  transform: {
    "^.+\\.tsx?$": "ts-jest"
  },
  testRegex: "(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$",
  globals: {
    "ts-jest": {
      "tsConfigFile": "tsconfig.json"
    }
  },
  moduleFileExtensions: [
    "ts",
    "tsx",
    "js",
    "jsx",
    "json",
    "node"
  ],

}

tsconfig.json

 {
  "compilerOptions": {
    "outDir": "./dist",
    "moduleResolution": "node",
    "sourceMap": true,
    "module": "commonjs",
    "allowJs": true,
    "target": "es5",
    "noUnusedParameters": false,
    "allowUnreachableCode": true,
    "allowUnusedLabels": true,
    "types": [
      "jest",
      "node",
      "express",
      "mongoose",
      "body-parser",
      "supertest"
    ],
    "lib": [
      "es2015"
    ]
  },
  "include": [
    "./src/**/*",
    "index.ts"
  ],
  "exclude": [
    "./node_modules",
    "**/*.spec.ts",
    "**/*.test.ts"
  ]
}

package.json文件的脚本和开发依赖性

    "scripts": {
    "test": "jest --watchAll --runInBand",
    "coverage": "jest --coverage",
    "start": "ts-node src/index.ts",
    "server": "./node_modules/nodemon/bin/nodemon.js",
    "client": "npm start --prefix ../client",
    "dev": "concurrently \"npm run server\" \"npm run client\""
  },
"devDependencies": {
"@types/body-parser": "^1.17.0",
"@types/express": "^4.16.0",
"@types/jest": "^23.3.12",
"@types/mongoose": "^5.3.7",
"@types/node": "^10.12.18",
"@types/supertest": "^2.0.7",
"jest": "^23.6.0",
"nodemon": "^1.18.9",
"supertest": "^3.3.0",
"ts-jest": "^23.10.5",
"ts-node": "^7.0.1",
"typescript": "^3.2.2"

}

Answer 1

原因是您传递到server的{{1}}是supertest。 undefined将在内部使用supertest，请参阅此line。这就是为什么它会引发错误：

TypeError：app.address不是函数

如果要动态导入app.address()，则应更改：

server

收件人：

let server;
beforeAll(async () => {
  server = import('../../../../src/index')
})

例如

let server; beforeAll(async () => { const mod = await import('../../../../src/index'); server = (mod as any).default; });：

index.ts

import express from 'express'; const app = express(); app.post('/api/users/auth/register', (req, res) => { res.status(400).json({ errArray: [] }); }); const port = 3001 || process.env.PORT; const server = app.listen(port, () => console.log(`Server running on port ${port}`)); export default server;：

index.test.ts

具有覆盖率报告的集成测试结果：

import request from 'supertest';

describe('/api/users/auth', () => {
  let server;
  beforeAll(async () => {
    const mod = await import('./');
    server = (mod as any).default;
  });

  afterAll((done) => {
    if (server) {
      server.close(done);
    }
  });

  it('should return 400 if email is invalid', async () => {
    const res = await request(server)
      .post('/api/users/auth/register')
      .send({
        email: 'nomail',
        password: 'validpassword123',
        name: 'name',
      });

    expect(res.status).toBe(400);
    expect(res.body).toHaveProperty('errArray');
  });
});

源代码：https://github.com/mrdulin/jest-codelab/tree/master/src/stackoverflow/54230886

Jest＆supertest ApI测试返回TypeError：app.address不是函数

1 个答案: