redux-pager-test/test/compiler/index.js

Test framework for redux-pager and related components. Enables redux-pager to not carry heavyweight dependencies.

require('jsdom')
const fs = require('fs')
const ReactTools = require('react-tools')
const origJs = require.extensions['.js']

// A module that exports a single, stubbed-out React Component.
const reactStub = 'module.exports = require("react").createClass({render:function(){return null;}});'

// Should this file be stubbed out for testing?
function shouldStub(filename) {
  if (!global.reactModulesToStub) return false

  // Check if the file name ends with any stub path.
  var stubs = global.reactModulesToStub
  for (var i = 0; i < stubs.length; i++) {
    if (filename.substr(-stubs[i].length) == stubs[i]) return true
  }
  return false
}

// Transform a file via JSX/Harmony or stubbing.
function transform(filename) {
  if (shouldStub(filename)) return reactStub
  else {
    var content = fs.readFileSync(filename, 'utf8')
    return ReactTools.transform(content, {harmony: true})
  }
}

// Install the compiler.
require.extensions['.js'] = function(module, filename) {
  // optimization: code in a distribution should never go through JSX compiler.
  if (filename.indexOf('node_modules/') >= 0)
    return (origJs || require.extensions['.js'])(module, filename)
  return module._compile(transform(filename), filename)
}