我有一个React应用程序(不使用创建React应用程序)，使用TypeScript, Jest, Webpack和Babel构建。当试图运行纱线笑话时，我得到以下错误:
我已经尝试删除所有包并重新添加它们。它不能解决这个问题。我看过类似的问题和文档，但我仍然误解了一些东西。我甚至按照另一个指南从头开始设置这个环境，但我的代码仍然遇到了这个问题。
依赖关系包括……
"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";
import * as renderer from "react-test-renderer";
import App from "../App";
it("Renders the Footer correctly", () => {
const tree = renderer
.create(<App />)
.toJSON();
expect(tree).toMatchSnapshot();
});
我希望能够在组件中使用命名导入，而不会导致测试失败。如果我在解决方案中只使用默认导入，似乎可以解决这个问题，但我宁愿不走那条路。
