jest + supertest + Typescript 設定

概要:

jest + supertest, Typescript の準備となります

• 前のjestの関連となります。
• 設定に、難航したので。作業メモです

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構成

• jest
• supertest
• express

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参考

• https://jestjs.io/ja/docs/getting-started

• https://qiita.com/okazuki/items/991a068892e946531612

• https://qiita.com/rnasahiro/items/2d6584a915745218442e

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npm add

npm install --save-dev jest ts-jest @types/jest
npm install --save-dev babel-jest @babel/core @babel/preset-env
npm install --save-dev @babel/preset-typescript

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jest --init
#

The following questions will help Jest to create a suitable configuration for your project

✔ Would you like to use Jest when running "test" script in "package.json"? … yes
✔ Would you like to use Typescript for the configuration file? … no
✔ Choose the test environment that will be used for testing › node
✔ Do you want Jest to add coverage reports? … no
✔ Which provider should be used to instrument code for coverage? › v8
✔ Automatically clear mock calls and instances between every test? … no

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• babel.config.js

module.exports = {
  presets: [['@babel/preset-env', {targets: {node: 'current'}}],
  '@babel/preset-typescript'
  ],
};

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• package.json

  "scripts": {
    "test": "jest"
  },

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• app.test.ts

app.test.ts

const request = require('supertest')
import {app}  from '../../index'

describe("GET /", () => {
  test("check: running string", async () => {
    const response = await request(app).get("/");
    expect(response.statusCode).toBe(200);
  });
});

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• test

yarn test

....