在开玩笑的打字稿中找不到名字

时间:2019-06-14 09:15:42

标签: reactjs typescript jestjs ts-jest

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"
      }

6 个答案:

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)

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

构建的
  "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。