相关疑难解决方法(0)

我有一个使用 TypeScript、Jest、Webpack 和 Babel 构建的 React 应用程序（不使用 Create React App）。尝试运行“yarn jest”时，出现以下错误：

我尝试删除所有软件包并重新添加它们。它没有解决这个问题。我看过类似的问题和文档，但仍然误解了一些东西。我什至按照另一个指南从头开始设置这个环境，但我的代码仍然收到这个问题。

依赖包括...

"dependencies": {
        "@babel/plugin-transform-runtime": "^7.6.2",
        "@babel/polyfill": "^7.6.0",
        "babel-jest": "^24.9.0",
        "react": "^16.8.6",
        "react-dom": "^16.8.6",
        "react-test-renderer": "^16.11.0",
        "source-map-loader": "^0.2.4"
    },
    "devDependencies": {
        "@babel/core": "^7.6.0",
        "@babel/preset-env": "^7.6.0",
        "@babel/preset-react": "^7.0.0",
        "@types/enzyme": "^3.9.2",
        "@types/enzyme-adapter-react-16": "^1.0.5",
        "@types/jest": "^24.0.13",

组件的导入行...

import * as React from "react";
import { BrowserRouter as Router, Route, Switch } from "react-router-dom";
import HomePage from "./components/pages";
import {
    Footer,
    Header,
    Navigation,
} from "./components/shared";

测试文件....

import * as React from "react"; …