const context = require.context('.', true, /.+\.test\.js?$/);
context.keys().forEach(context);
module.exports = context;

然后配合这样的配置文件即可：

const path = require('path');
const nodeExternals = require('webpack-node-externals');
const {resolve} = require('./webpack.base.config');
resolve.alias.test = path.resolve(__dirname, '../test');
const config = {
  target: 'node',
  entry: 'test/index.js',
  output: {
    path: path.resolve(__dirname, '../dist'),
    filename: 'test.build.js',
  externals: [nodeExternals()],
  module: {
    rules: [
        test: /\.vue$/,
        loader: 'vue-loader',
        test: /\.js$/,
        exclude: /node_modules/,
        use: [
            loader: 'babel-loader',
            options: {
              cacheDirectory: true,
        test: /\.ya?ml$/,
        use: [
          'json-loader',
          'yaml-loader',
        exclude: /node_modules/
        test: /\.(css|styl)$/,
        loader: 'null-loader',
        test: /\.(png|jpg|gif|svg|woff2|eot|woff|ttf|ico)$/,
        loader: 'null-loader',
        test: /\.pug$/,
        loader: 'pug-plain-loader',
  mode: 'none',
  resolve,
module.exports = config;

执行的时候，直接用 shell 脚本来跑就行。