Isparta Loader for Webpack, Babel 6, and React

isparta-loader-example.js

//webpack config
export default {
  isparta: {
    embedSource: true,
    noAutoWrap: true,
    babel: {
      presets: ['es2015', 'stage-0', 'react']
    }
  },
  module: {
    preLoaders: [
      {
        test: /\.jsx?$/,
        loader: 'isparta',
        exclude: [
          /(test|node_modules)/,
          addbase(srcDir, scriptDir, 'index.js') //exclude react component mounting
        ]
      }
    ]
  }
}

//bootstrap.test.js
const {TEST_FILE} = process.env;
const re = TEST_FILE !== null ? new RegExp(`${TEST_FILE}.js`) : /-spec\.js$/;

const context = require.context('../integration', true, /-spec\.js$/);
context.keys().forEach((key) => {
  if (re.test(key)) {
    context(key);
  }
});

const componentsContext = require.context('../../src/js', true, /\.jsx?$/);
componentsContext.keys().forEach((key) => {
  /**
   * recursively require all source for isparta code coverage
   * ignore index.js because React component will try to mount before
   * DOM is available
   */
  if (!/\.\/index\.jsx?$/.test(key)) {
    componentsContext(key);
  }
});

//karma.config
config.set({
  files: [
    testPath
  ],
  preprocessors,
  reporters: [ 'spec', 'coverage' ],
  coverageReporter: {
    reporters: [
      {type: 'lcov', dir: 'coverage/', subdir: '.'},
      {type: 'json', dir: 'coverage/', subdir: '.'},
      {type: 'text-summary'}
    ]
  },
  webpack: webpackConfig,
  webpackMiddleware: {
    noInfo: true
  }
})