'use strict';

const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const StyleLintPlugin = require('stylelint-webpack-plugin');
const SplitByPathPlugin = require('webpack-split-by-path');

const basePlugins = [
  new webpack.DefinePlugin({
    __DEV__: process.env.NODE_ENV !== 'production',
    __PRODUCTION__: process.env.NODE_ENV === 'production',
    __TEST__: process.env.TEST === true,
    'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV),
  }),
  new SplitByPathPlugin([
    { name: 'vendor', path: [__dirname + '/node_modules/'] },
  ]),
  new HtmlWebpackPlugin({
    template: './src/index.html',
    inject: 'body',
    minify: false,
  }),
  new webpack.NoErrorsPlugin(),
];

const devPlugins = [
  new StyleLintPlugin({
    configFile: './.stylelintrc',
    files: ['src/**/*.css'],
    failOnError: false,
  }),
];

const prodPlugins = [
  new webpack.optimize.OccurenceOrderPlugin(),
  new webpack.optimize.DedupePlugin(),
  new webpack.optimize.UglifyJsPlugin({
    mangle: {
      keep_fnames: true,
    },
    compress: {
      warnings: false,
    },
  }),
];

module.exports = basePlugins
  .concat(process.env.NODE_ENV === 'production' ? prodPlugins : [])
  .concat(process.env.NODE_ENV === 'development' ? devPlugins : []);


@@ -396,24 +396,39 @@
   __TEST__: 
+JSON.stringify(
 process.env.
@@ -436,16 +436,17 @@
 EST 
-=== true
+%7C%7C false)
 ,%0A  

Set __TEST__ through Webpack