Javascript Jest测试因意外标记而失败，应为“1”&引用；

我有一个使用Typescript和Jest的节点项目。目前我有这个项目结构

使用此

tsconfig.json

文件

  "compilerOptions": {
    "target": "ES2017",
    "module": "commonjs",
    "allowJs": true,
    "outDir": "dist",
    "rootDir": "src",
    "strict": true,
    "moduleResolution": "node",
    "esModuleInterop": true
  }

module.exports = {
  clearMocks: true,
  coverageDirectory: "coverage",
  testEnvironment: "node",
};

{
  "scripts": {
    "start": "node dist/App.js",
    "dev": "nodemon src/App.ts",
    "build": "tsc -p .",
    "test": "jest"
  },
  "dependencies": {
    "commander": "^3.0.1"
  },
  "devDependencies": {
    "@types/jest": "^24.0.18",
    "@types/node": "^12.7.4",
    "jest": "^24.9.0",
    "nodemon": "^1.19.2",
    "ts-jest": "^24.0.2",
    "ts-node": "^8.3.0",
    "typescript": "^3.6.2"
  }
}

这个

jest.config.js

文件

  "compilerOptions": {
    "target": "ES2017",
    "module": "commonjs",
    "allowJs": true,
    "outDir": "dist",
    "rootDir": "src",
    "strict": true,
    "moduleResolution": "node",
    "esModuleInterop": true
  }

module.exports = {
  clearMocks: true,
  coverageDirectory: "coverage",
  testEnvironment: "node",
};

{
  "scripts": {
    "start": "node dist/App.js",
    "dev": "nodemon src/App.ts",
    "build": "tsc -p .",
    "test": "jest"
  },
  "dependencies": {
    "commander": "^3.0.1"
  },
  "devDependencies": {
    "@types/jest": "^24.0.18",
    "@types/node": "^12.7.4",
    "jest": "^24.9.0",
    "nodemon": "^1.19.2",
    "ts-jest": "^24.0.2",
    "ts-node": "^8.3.0",
    "typescript": "^3.6.2"
  }
}

这个

package.json

文件

  "compilerOptions": {
    "target": "ES2017",
    "module": "commonjs",
    "allowJs": true,
    "outDir": "dist",
    "rootDir": "src",
    "strict": true,
    "moduleResolution": "node",
    "esModuleInterop": true
  }

module.exports = {
  clearMocks: true,
  coverageDirectory: "coverage",
  testEnvironment: "node",
};

{
  "scripts": {
    "start": "node dist/App.js",
    "dev": "nodemon src/App.ts",
    "build": "tsc -p .",
    "test": "jest"
  },
  "dependencies": {
    "commander": "^3.0.1"
  },
  "devDependencies": {
    "@types/jest": "^24.0.18",
    "@types/node": "^12.7.4",
    "jest": "^24.9.0",
    "nodemon": "^1.19.2",
    "ts-jest": "^24.0.2",
    "ts-node": "^8.3.0",
    "typescript": "^3.6.2"
  }
}

我在测试目录中创建了一个测试文件

import { App } from '../src/App';

describe('Generating App', () => {
  let app: App;

  test('It runs a test', () => {
    expect(true).toBe(true);
  });
});

但不幸的是，我得到了一个语法错误

SyntaxError:C:…\tests\App.test.ts:意外标记，应为“ （5:9）

---

在我的

应用程序中

变量。似乎测试运行人员无法理解Typescript代码。如何修复配置以支持Jest测试文件中的Typescript？

尝试在Jest配置中添加Typescript扩展名：

module.exports = {
  roots: ['<rootDir>'],
  transform: {
    '^.+\\.ts?$': 'ts-jest'
  },
  testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.ts?$',
  moduleFileExtensions: ['ts', 'js', 'json', 'node'],
  collectCoverage: true,
  clearMocks: true,
  coverageDirectory: "coverage",
};

---

谢谢你的帮助。当我运行

npm run test

I时，模式返回0个与

run with'--passWithNoTests'匹配的项，以退出C:\。。。检查了6个文件

，似乎无法使用

测试

目录..=？我认为这是因为您的测试在src文件夹之外，所以我更新了jest配置，添加了

根：[''']，

而不是

根：['/src']，

现在应该可以工作了：）您的测试位于

测试

文件夹中，但是在

jest.config.js中，您已经指定了文件夹
\uu tests
。指定了不同的路径，但没有与之匹配的路径。在我的情况下，它不会将ts文件传输到js中。当我添加answer的transform属性时，它开始传输并传递给另一个问题，该问题由tsConfig属性解决。谢谢