运行Jest / React测试时出现意外令牌错误

Question

我正在运行jest / react测试并收到以下错误：

/Users/sn/Documents/react-testing-with-jest-master/starter/CountdownTimer/jest.config.js:2
    "moduleFileExtensions": [
                          ^

SyntaxError: Unexpected token :

npm ERR! Test failed.  See above for more details.

这是我的jest.config.js：

{
    "moduleFileExtensions": [
        "js",
        "jsx"
    ],
    "moduleNameMapper": {
        "Clock": "<rootDir>/app/components/Clock.jsx",
        "CountdownForm": "<rootDir>/app/components/CountdownForm.jsx",
        "Countdown": "<rootDir>/app/components/Countdown.jsx"
    }
}

Answer 1

由于您已将文件命名为jest.config.js而不是jest.config.json，因此您需要导出有效的JavaScript对象。

或者：

1. 将文件重命名为jest.config.json或
2. 导出有效的JS对象：

jest.config.js：

{
    moduleFileExtensions: [
        "js",
        "jsx"
    ],
    moduleNameMapper: {
        Clock: "<rootDir>/app/components/Clock.jsx",
        CountdownForm: "<rootDir>/app/components/CountdownForm.jsx",
        Countdown: "<rootDir>/app/components/Countdown.jsx"
    }
}