Reactjs 找不到模块'@巴别塔/预设寄存器'；

我不太会反应和开玩笑，在我的第一次实验中，我在运行

Jest--watchAll

时遇到了以下错误：

     FAIL  src/components/App.test.js
  ● Test suite failed to run

    Cannot find module '@babel/preset-register' from '/Users/joaomatos/projects/dummy'
    - If you want to resolve "@babel/register", use "module:@babel/register"

      at Function.module.exports [as sync] (node_modules/resolve/lib/sync.js:74:15)
      at resolveStandardizedName (node_modules/@babel/core/lib/config/files/plugins.js:101:31)
      at resolvePreset (node_modules/@babel/core/lib/config/files/plugins.js:58:10)
      at loadPreset (node_modules/@babel/core/lib/config/files/plugins.js:77:20)
      at createDescriptor (node_modules/@babel/core/lib/config/config-descriptors.js:154:9)
      at node_modules/@babel/core/lib/config/config-descriptors.js:109:50
          at Array.map (<anonymous>)
      at createDescriptors (node_modules/@babel/core/lib/config/config-descriptors.js:109:29)
      at createPresetDescriptors (node_modules/@babel/core/lib/config/config-descriptors.js:101:10)
      at presets (node_modules/@babel/core/lib/config/config-descriptors.js:47:19)

和.babel.rc：

{
  "plugins": [
    "@babel/plugin-proposal-class-properties"
  ],
  "env": {
    "test": {
      "presets": [
        "env",
        "@babel/preset-env",
        "@babel/preset-react",
        "@babel/preset-stage-2",
        "@babel/register",
        "stage-2",
        "react"
      ],
      "plugins": [
        "transform-export-extensions",
        "transform-class-properties"
      ],
      "only": [
        "./**/*.js",
        "node_modules/jest-runtime"
      ]
    }
  }

还有我的测试：

import React from 'react';
import Enzyme, {shallow} from 'enzyme';
import EnzymeAdapter from 'enzyme-adapter-react-16';
import App from './App';

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

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

从“React”导入React；
输入酶，{shall}来自“酶”；
从'enzyme-adapter-react-16'导入EnzymeAdapter；
从“./App”导入应用程序；
configure（{adapter:new EnzymeAdapter（）}）；
试验(
“渲染而不崩溃”，
() => {
常量包装器=浅（）；
expect（wrapper.toBeTruthy（）；
}
);

有人知道我为什么会犯这个错误吗

---

谢谢您的帮助。

不是预设，因此您将面临错误消息。您确定您需要它作为启动项目吗？尝试将其从

babel.rc

中的

预设

数组中删除。谢谢您的提示，但不幸的是，它没有任何区别

import React from 'react';
import Enzyme, {shallow} from 'enzyme';
import EnzymeAdapter from 'enzyme-adapter-react-16';
import App from './App';

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

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