错误运行 jest react 测试，无法识别 jest

Question

我正在尝试运行一些有趣的测试，但一直出现错误：

'jest' 不是内部或外部命令，也不是可运行的程序或批处理文件。

这是我的 package.json，谁能帮我设置测试框架？

{
 "name": "lac-react",
 "version": "0.0.0",
 "description": "",
 "main": "index.js",
 "scripts": {
 "test": "jest"
},
 "author": "",
 "license": "ISC",
 "devDependencies": {
  "browserify": "^9.0.8",
  "gulp": "^3.8.11",
  "gulp-concat": "^2.5.2",
  "gulp-cssmin": "^0.1.7",
  "gulp-react": "^3.0.1",
  "gulp-rename": "^1.2.2",
  "gulp-streamify": "0.0.5",
  "gulp-uglify": "^1.2.0",
  "gulp-watch": "^4.2.4",
  "reactify": "^1.1.0",
  "vinyl-source-stream": "^1.1.0",
  "watchify": "^3.2.1"
},
"jest": {
  "scriptPreprocessor": "./preprocessor.js",
  "unmockedModulePathPatterns": [
    "react"
  ],
  "testPathDirs": [
    "./src/components/__tests__/"
  ]
},
"dependencies": {
  "moment": "^2.10.2",
  "react": "^0.13.2",
  "react-datepicker": "^0.6.2",
  "react-message": "^1.3.0",
  "react-router": "^0.13.3",
  "react-skylight": "^0.2.0",
  "superagent": "^1.2.0",
  "react": "*",
  "react-tools": "*",
  "jest-cli": "*"
}
}

Answer 1

仔细观察错误，我有这个：

error MSB8020: The build tools for Visual Studio 2010 (Platform Toolset = 'v100') cannot be found. To build using the v100 build tools, p lease install Visual Studio 2010 build tools.

我在执行 npm 安装时通过添加构建工具的版本解决了这个问题：

--msvs_version=2013

现在一切正常。

您也可以通过添加系统变量来解决这个问题

Answer 2

安装 jest-cli。它对我有用。只是 npm i jest-cli 测试脚本应该保持不变 "jest

错误运行 jest react 测试，无法识别 jest

Error running jest react test, jest not recognized

npm

reactjs

jestjs

错误 运行 jest react 测试，无法识别 jest

Error running jest react test, jest not recognized

npm

reactjs

jestjs

错误运行 jest react 测试，无法识别 jest