React 0.14.7: `<option value="">empty</option>` emits empty string on change
http://jsbin.com/pisita/10/edit?html,js,console,output
React 15.0.0-rc.1`<option value="">empty</option>` emits string with value "empty" on change
http://jsbin.com/bemaze/12/edit?html,js,console,output
This is because React 15.0.0-rc.1 cuts off `value=""` from option tag

* All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * @emails react-core
 */
'use strict';
var emptyFunction = require('emptyFunction');
describe('ReactDOMTextarea', function() {
  var React;
  var ReactDOM;
  var ReactLink;
  var ReactTestUtils;
  var renderTextarea;
  beforeEach(function() {
    React = require('React');
    ReactDOM = require('ReactDOM');
    ReactLink = require('ReactLink');
    ReactTestUtils = require('ReactTestUtils');
    renderTextarea = function(component, container) {
      if (!container) {
        container = document.createElement('div');
      }
      var stub = ReactDOM.render(component, container);
      var node = ReactDOM.findDOMNode(stub);
      
      
      node.value = node.innerHTML.replace(/^\n/, '');