Wallaby.js

// Wallaby.js configuration

const wallabify = require('wallabify')
const wallabyPostprocessor = wallabify({
  // browserify options, such as
  // insertGlobals: false
}
  // you may also pass an initializer function to chain other
  // browserify options, such as transformers
  // , b => b.exclude('mkdirp').transform(require('babelify'))
)

module.exports = function () {
  return {
    // set `load: false` to all of the browserified source files and tests,
    // as they should not be loaded in browser,
    // their browserified versions will be loaded instead
    files: [
      { pattern: 'src/**/*.js', load: false }
    ],

    tests: [
      { pattern: 'test/**/*.js', load: false }
    ],

    postprocessor: wallabyPostprocessor,

    setup: function () {
      // required to trigger tests loading
      window.__moduleBundler.loadTests()
    }
  }
}