webpack.config.test.js

const path = require('path');
const nodeExternals = require('webpack-node-externals');
const webpack = require('webpack');

module.exports = {
  mode: 'production',
  target: 'node',
  externals: [nodeExternals()],
  module: {
    rules: [
      // Some contributed code needs to be transpiled first.
      {
        include: /(excellentexport.js)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env'],
            compact: false,
          },
        },
      },
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react'],
          },
        },
      },
    ],
  },
  plugins: [
    new webpack.ProvidePlugin({
      $: 'jquery',
      jQuery: 'jquery',
    }),
    new webpack.ProvidePlugin({
      process: 'process/browser',
    }),
  ],
  resolve: {
    extensions: ['.js', '.jsx', '.json'],
    modules: [path.join(__dirname, 'js'), 'node_modules'],
    alias: {
      settings$: path.join(__dirname, 'js', 'settings', 'development.js'),
    },
  },
};