使用JEST的Nodejs如何使用ES6和相对路径导入？

npm init -y

npm install --save-dev jest babel-jest @babel/core @babel/preset-env

{
  "presets": ["@babel/preset-env"]
}

module.exports = {
  transform: {
    '^.+\\.js$': 'babel-jest',
  },
  moduleFileExtensions: ['js', 'json', 'jsx', 'node'],
  moduleDirectories: ['node_modules', 'src'],
};

/project-root
  /src
    /utils
      math.js
    index.js
  /tests
    math.test.js
  package.json
  jest.config.js
  .babelrc

export const add = (a, b) => a + b;
export const subtract = (a, b) => a - b;

import { add, subtract } from './utils/math';

console.log(add(2, 3)); // 5
console.log(subtract(5, 2)); // 3

import { add, subtract } from '../src/utils/math';

test('adds 2 + 3 to equal 5', () => {
  expect(add(2, 3)).toBe(5);
});

test('subtracts 5 - 2 to equal 3', () => {
  expect(subtract(5, 2)).toBe(3);
});

{
  "scripts": {
    "test": "jest"
  }
}

npm test