webpack.test.config.js
const config = require('./webpack.config')
config.target = 'node'
config.externals = config.externals.concat([
'react/lib/ExecutionEnvironment',
'react/lib/ReactContext',
'react/addons',
'react-test-renderer/shallow',
'react-dom/test-utils',
'canvas',
'bufferutil',
'utf-8-validate'
])
module.exports = config