jsTransformer.js

const babelJest = require('babel-jest');
const { dirname } = require('path');
const { compatDirname } = require('umi-utils');

const cwd = process.cwd();

module.exports = babelJest.createTransformer({
  presets: [
    require.resolve('@babel/preset-typescript'),
    [
      require.resolve('babel-preset-umi'),
      {
        transformRuntime: false,
        // ...(process.env.TARGETS === 'node' ? { targets: { node: 8 } } : {}),
      },
    ],
  ],
  plugins: [
    [
      require.resolve('babel-plugin-module-resolver'),
      {
        alias: {
          // Projects don't need to install react, react-dom and enzyme
          react: compatDirname(
            'react/package',
            cwd,
            dirname(require.resolve('react/package.json')),
          ),
          'react-dom': compatDirname(
            'react-dom/package',
            cwd,
            dirname(require.resolve('react-dom/package.json')),
          ),
          enzyme: compatDirname(
            'enzyme/package.json',
            cwd,
            dirname(require.resolve('enzyme/package.json')),
          ),
          'enzyme-adapter-react-16': compatDirname(
            'enzyme-adapter-react-16/package.json',
            cwd,
            dirname(require.resolve('enzyme-adapter-react-16/package.json')),
          ),
        },
      },
      'ddn-test',
    ],
  ],
});