@mhy/config/dist/jest/preprocess.js

> This documentation is not complete. It's in progress and it's a BETA version. Use the tool at your own risk.

"use strict";

const path = require('path');

const fs = require('fs');

const babelrc = JSON.parse(fs.readFileSync(path.resolve(__dirname, '.babelrc'), 'utf8'));
babelrc.presets.find(([name]) => name.includes('preset-env'))[1].modules = 'commonjs';
babelrc.plugins.push(require.resolve('babel-plugin-dynamic-import-node'));

const transformer = require('babel-jest').createTransformer(babelrc);

const proc = transformer.process.bind(transformer);

transformer.process = function (...args) {
  const [code, path] = args;

  if (!path.includes('node_modules') || code.includes('import')) {
    return proc(...args);
  }

  return code;
};

module.exports = transformer;