“找不到命令：开玩笑”

我有一个像这样的测试文件：（我正在使用 create-react-app）

import React from 'react';
import ReactDOM from 'react-dom';
import App from './components/Calculator';

import { getAction, getResult } from './actions/'

import {shallow} from 'enzyme';
import toJson from 'enzyme-to-json';

import Enzyme from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

Enzyme.configure({ adapter: new Adapter() });

it('renders without crashing', () => {
  const wrapper = shallow(<App />)
  expect(toJson(wrapper)).toMatchSnapshot();
});

it('displays the choosen operator', () => {
  const action = {
      type: 'GET_ACTION',
      operator: '+'
    };
  expect(getAction("+")).toEqual(action)
})

it('displays the typed digit', () => {
  const action = {
    type: 'GET_RESULT',
    n: 3
  };
  expect(getResult(3)).toEqual(action);
})

it('checks that the clickevent for getNumber is called',() => {
  const clickEvent = jest.fn();
  const p = shallow(<p data-n="1" onClick={clickEvent}>1</p>)
  p.simulate('click')
  expect(clickEvent).toBeCalled();
})

和一个 package.json：

{
  "name": "my-app",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "react": "^16.2.0",
    "react-dom": "^16.2.0",
    "react-scripts": "1.1.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    // "test": "react-scripts test --env=jsdom",
    "test": "jest",
    "eject": "react-scripts eject"
  },
  "devDependencies": {
    "enzyme": "^3.3.0",
    "enzyme-adapter-react-16": "^1.1.1",
    "enzyme-to-json": "^3.3.3",
    "jest": "^22.4.3"
  }
}

当我跑步时jest --updateSnapshot我得到：

command not found: jest

但笑话已安装。

答案

Jest已安装，但可能在您的./node_modules/.bin目录。./node_modules/.bin/jest --updateSnapshot。jest作为一个scripts命令在你的package.json你也可以运行它npm test -- --updateSnapshot。 ./node_modules/.bin到你的道路。

更新：较新版本的yarn将解析节点模块bin脚本，因此您也可以只运行yarn jest {cmd}它应该有效。

来自: stackoverflow.com

答案#

答案