问题描述
我正在使用 Jest(我的首选测试框架)来测试前端 React 项目中的 .jsx 文件。
此命令用于安装 Jest:npm i --dev jest babel-jest @babel/preset-env @babel/preset-react react-test-renderer
这些是 package.json 文件中已安装的依赖项:
"dependencies": {
"@babel/preset-env": "^7.13.15","@babel/preset-react": "^7.13.13","babel-jest": "^26.6.3","body-parser": "^1.19.0","cors": "^2.8.5","express": "^4.17.1","jest": "^26.6.3","net": "^1.0.2","react": "^16.0.0","react-dom": "^16.0.0","react-router-dom": "^4.1.2","react-test-renderer": "^17.0.2","rootpath": "^0.1.2"
},"devDependencies": {
"@types/node": "^8.0.29","babel-core": "^6.26.0","babel-loader": "^7.1.5","babel-preset-env": "^1.6.1","babel-preset-react": "^6.16.0","babel-preset-stage-0": "^6.24.1","file-loader": "^6.2.0","html-webpack-plugin": "^3.2.0","path": "^0.12.7","webpack": "^4.15.0","webpack-cli": "^3.0.8","webpack-dev-server": "^3.11.2"
}
为了运行依赖Webpack的项目,.babelrc文件是这样的:
{
"presets": [
"react","env","stage-0"
]
}
但是,我需要将预设更改为以下内容,以便 Jest 能够处理测试用例。
{
"presets": ["@babel/preset-env","@babel/preset-react"]
}
如果我使用上述预设运行项目,我会在本地主机服务器上收到此消息:
错误:子编译失败:模块构建失败(来自 ./node_modules/babel-loader/lib/index.js): 错误:需要 Babel “^7.0.0-0”,但加载了“6.26.3”。如果你确定你有一个 @babel/core 的兼容版本,很可能是 您的构建过程正在加载错误的版本。检查堆栈 跟踪此错误以查找未提及的第一个条目 "@babel/core" 或 "babe l-core" 看看什么叫 Babel。 (尽管 处理预设:“C:\GIT\TypeORMcar\frontbackTypeORMcar \frontend\node_modules\@babel\preset-env\lib\index.js")
解决方法
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