add script to test against multiple versions

Author: jquense

_test-bootstrap.js

@@ -0,0 +1,13 @@
+
+/* global it, expect */
+'use strict';
+var React = require('react');
+var testsContext = require.context("./test", true, /\.browser\.(js$|jsx$)/);
+
+if ( typeof __REACT_VERSION__ !== 'undefined' ) {
+  it('Ensure we are testing against the correct version of React: ' + __REACT_VERSION__, ()=>{
+    expect(React.version).to.equal(__REACT_VERSION__)
+  })
+}
+
+testsContext.keys().forEach(testsContext);

_test-versions.js

@@ -0,0 +1,86 @@
+'use strict';
+var server = require('karma').server
+  , webpack = require('webpack')
+  , webpackConfig = require('./webpack.configs').test;
+
+var plugins = webpackConfig.plugins || [];
+
+webpackConfig.externals = {
+  'react':  'window.React',
+  'react/addons':  'window.React'
+}
+
+var SUPPORTED_VERSIONS = ["0.12.2", "0.13.0"];
+
+series(SUPPORTED_VERSIONS, function(version, idx, next){
+  console.log('-------------------------------------------');
+  console.log('------- Testing React version: ' + version );
+  console.log('-------------------------------------------');
+
+  server.start(
+      config(version)
+    , function(exitCode) {
+        if ( exitCode ) 
+          process.exit(exitCode)
+
+        next();
+      });
+}, function(){
+  process.exit(0)
+})
+
+function config(version){
+  
+  webpackConfig.plugins = plugins.concat(
+    new webpack.DefinePlugin({
+      '__REACT_VERSION__': JSON.stringify(version),
+    })
+  )
+
+  return {
+
+    basePath: '',
+
+    frameworks: ['mocha', 'expect'],
+
+    files: [
+      './vendor/phantomjs-shim.js',
+      'https://cdnjs.cloudflare.com/ajax/libs/react/'+ version + '/react-with-addons.js',
+      './vendor/sinon-1.10.3.js',
+      './vendor/jquery-1.11.2.min.js',
+      '_test-bootstrap.js',
+    ],
+
+    reporters: ['mocha'],
+
+    port: 9876,
+    colors: true,
+    autoWatch: false,
+    singleRun: true,
+
+    logLevel: 'INFO',
+
+    browsers: ['PhantomJS'],
+
+    preprocessors: {
+      '_test-bootstrap.js': ['webpack']
+    },
+
+    webpack: webpackConfig,
+    webpackServer: {
+      noInfo: true
+    }
+  }
+}
+
+
+function series(versions, iter, cb){
+
+  (function next(idx){
+    if( idx === versions.length) 
+      return cb && cb()
+   
+    iter(versions[idx], idx, next.bind(null, idx + 1))
+
+  })(0)
+}