Question

对于单元测试，我使用mocha + chai。我使用"test": "mocha --require ts-node/register 'src/**/*spec.ts'"运行命令。

当我在* spec.ts文件（例如import { expect } from 'chai';）中使用导入

我收到错误SyntaxError: Cannot use import statement outside a module

我的tsconfig.json：

{
  "compilerOptions": {
    "baseUrl": "src",
    "target": "esnext",
    "module": "esnext",
    "moduleResolution": "node",
    "lib": ["dom", "es2018"],
    "allowSyntheticDefaultImports": true,
    "noUnusedLocals": true,
    "removeComments": true,
    "resolveJsonModule": true,
    "strict": true,
    "typeRoots": ["node_modules/@types"]
  },
  "exclude": ["node_modules"],
  "include": ["src/**/*.ts"]
}

Answer 1

您尝试过const expect = require('chai')吗？

这是一种包装CommonJS中使用的模块的方法，该模块等效于import { expect } from 'chai';。

Answer 2

“ mocha”仅用于 commonJS 模块。您可以通过在node_modules / mocha中搜索README文件来找到它。

如果您想使用 esnext ，我建议您改为“开玩笑”。它与“摩卡咖啡”相差不大。

适合我的配置示例：

tsconfig.json

{
  "compilerOptions": {
    "target": "es6",
    "lib": [
      "dom",
      "dom.iterable",
      "esnext"
    ],
    "allowJs": true,
    "skipLibCheck": true,
    "strict": true,
    "forceConsistentCasingInFileNames": true,
    "noEmit": true,
    "esModuleInterop": true,
    "module": "esnext",
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "isolatedModules": true,
    "jsx": "preserve"
  },
  "exclude": [
    "node_modules"
  ],
  "include": [
    "next-env.d.ts",
    "**/*.ts",
    "**/*.tsx"
  ]
}

package.json

{
  "name": "website",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start",
    "test": "jest",
    "test-watch": "npm run test -- --watch",
    "pretty": "prettier --write \"**/*.js\""
  },
  "dependencies": {
    "@material-ui/core": "^4.9.9",
    "@material-ui/icons": "^4.9.1",
    "next": "9.3.4",
    "react": "16.13.1",
    "react-dom": "16.13.1"
  },
  "devDependencies": {
    "@types/jest": "^25.2.1",
    "@types/node": "^13.11.0",
    "@types/react": "^16.9.32",
    "jest": "^25.2.7",
    "prettier": "^2.0.2",
    "ts-jest": "^25.3.1",
    "ts-node": "^8.8.1",
    "typescript": "^3.8.3"
  }
}

jest.config.json

module.exports = {
  roots: ["<rootDir>"],
  transform: {
    "^.+\\.tsx?$": "ts-jest"
  },
  testRegex: "(/tests/.*|(\\.|/)(test|spec))\\.tsx?$",
  moduleFileExtensions: ["ts", "tsx", "js", "jsx", "json", "node"]
};

无法在.spec.ts文件NodeJs中的模块外部使用import语句

2 个答案: