Npm 运行jest react测试时出错，无法识别jest

我正在尝试运行一些jest测试，但不断出现错误：

“jest”不能识别为内部或外部命令、可操作程序或批处理文件

这是我的package.json，有人能帮我安装测试框架吗

{
 "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": "*"
}
}

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仔细观察这些错误，我发现：

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.

我通过在执行npm安装时添加构建工具的版本修复了此问题：

--msvs_version=2013

现在一切都好了

也可以通过添加系统变量来解决此问题

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安装jest cli。这对我有用。 我只是开玩笑

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测试脚本应该保持不变“jest

您好，谢谢您的回答。但是，由于您没有使用任何格式，所以它读起来不是很好，而且不清楚您所说的测试脚本应该保持不变”jest是什么意思