相关疑难解决方法(0)

根据网络配置玩笑的角度对各种指南是那么容易，因为这个：

ng new jest-test
cd jest-test
npm i -D jest jest-preset-angular

修改package.json：

"test": "jest",
[...]
"jest": {
    "preset": "jest-preset-angular",
    "setupTestFrameworkScriptFile": "./src/setup-jest.ts"
},

setup-jest.ts：

import 'jest-preset-angular';

但是，在运行时，npm test我会不断遇到此错误：

Jest encountered an unexpected token

This usually means that you are trying to import a file which Jest cannot parse, e.g. it's not plain JavaScript.

By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules".

Here's what you …