我尝试在react + typescript中为玩笑创建一个初始设置。我已经完成了初始设置并尝试检查测试是否运行。 当我使用npm test命令运行测试时,出现以下错误
Cannot find name 'it'. Do you need to install type definitions for a test runner? Try `npm i @types/jest` or `npm i @types/mocha`.
我已经安装了笑话类型,并删除了tsconfig.json中的类型,但是仍然出现相同的错误。
{
"compilerOptions": {
"target": "es6",
"lib": ["dom", "dom.iterable", "esnext"],
"allowJs": true,
"skipLibCheck": true,
"esModuleInterop": true,
"allowSyntheticDefaultImports": true,
"strict": true,
"forceConsistentCasingInFileNames": true,
"module": "esnext",
"moduleResolution": "node",
"plugins": [{ "name": "typescript-tslint-plugin" }],
"resolveJsonModule": true,
"isolatedModules": true,
"noEmit": true,
"jsx": "preserve",
"pretty": true,
"baseUrl": "src",
"types": ["jest"],
"typeRoots": ["./src/types"],
"suppressImplicitAnyIndexErrors": true
},
"include": ["src", "node_modules/@types/jest"],
"exclude": ["node_modules"]
}
`
Package.json
"jest": {
"transform": {
".(ts|tsx)": "ts-jest"
},
"testRegex": "(/__tests__/.*|\\.(test|spec))\\.(ts|tsx|js)$",
"moduleFileExtensions": [
"ts",
"tsx",
"js"
]
},
"devDependencies": {
"@babel/plugin-proposal-export-default-from": "^7.2.0",
"@types/enzyme": "^3.9.3",
"@types/jest": "^24.0.14",
"enzyme": "^3.10.0",
"gh-pages": "^1.2.0",
"husky": "^2.2.0",
"jest": "^24.8.0",
"node-sass": "^4.11.0",
"prettier": "^1.17.0",
"react-scripts": "2.1.8",
"react-test-renderer": "^16.8.6",
"stylelint": "^9.3.0",
"stylelint-config-recommended-scss": "^3.2.0",
"stylelint-config-standard": "^18.2.0",
"stylelint-order": "^0.8.1",
"stylelint-scss": "^3.1.3",
"ts-jest": "^24.0.2",
"tslint": "^5.16.0",
"tslint-config-prettier": "^1.18.0",
"tslint-plugin-prettier": "^2.0.1",
"tslint-react": "^4.0.0",
"tslint-react-hooks": "^2.1.0"
}
答案 0 :(得分:0)
在tsconfig.json中添加以下代码
"types": ["jest"],
"typeRoots": ["./src/types", "node_modules/@types"],
答案 1 :(得分:0)
将ts-loader
更新到v6.0.1
或以上可以达到目的。
答案 2 :(得分:0)
安装::
npm install jest @ types / jest ts-jest
-jest.config.js-根目录-
module.exports = {
roots: ['<rootDir>/src'],
transform: {
'^.+\\.tsx?$': 'ts-jest',
},
testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.tsx?$',
moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
}
---- tsconfig.json ---
{
"compilerOptions": {
...
"types": ["reflect-metadata", "jest"],
"typeRoots": ["./types", "./node_modules/@types"]
...
},
"exclude": ["node_modules", "**/*.spec.ts", "**/*.test.ts"],
"include": ["./src/**/*.tsx", "./src/**/*.ts"]
}
希望它对您有用...:)
答案 3 :(得分:0)
对我来说,问题是我的tsconfig.json
是用
"include": [
"src"
]
我不得不将其更改为
"include": [
"src",
"tests"
]
(我的测试全部在目录“ tests”中)
答案 4 :(得分:0)
安装@types/jest npm install @types/jest
并在 package.json 中添加配置到 jest
...
"jest": {
"globals": {
"ts-jest": {
"tsconfig": "path_our_tests/jest.tsconfig.json"
}
}
}
创建文件 jest.tsconfig.json 到 test 目录,就像这样:
{
"extends": "../tsconfig.json",
"compilerOptions": {
"types": ["jest"]
}
}
这样您就不会更改项目的全局配置,并防止破坏您的代码
答案 5 :(得分:-1)
就我而言,问题在于我的 jest
目录中实际上没有 ./node_modules/@types
文件夹。运行 npm i @types/jest
声称该软件包是 up to date
,但它仍然不存在于我应该安装它的 node_modules/@types
中,因此错误仍然存在。
我通过全局安装 @types/jest
并将安装的软件包复制到我的 ./node_modules/@types
解决了该问题。
要全局安装 @jest/types
,请运行:
npm i -g @types/jest
要获取全局 node_modules 的路径,请运行:
npm root -g
要确认 @types/jest
包在那里,请运行:
ls $(npm root -g)/@types
然后cd到你的项目目录并运行
cp -R $(npm root -g)/@types/jest ./node_modules/@types
将其复制到本地 node_modules。