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

return (new NodeStub(props))._createContentMarkup(
          transaction,
          props,
          {}
        );
      };
      this.addMatchers({
        toHaveInnerhtml: function(html) {
          var expected = '^' + quoteRegexp(html) + '$';
          return this.actual.match(new RegExp(expected));
        },
      });
    });
    it('should handle dangerouslySetInnerHTML', function() {
      var innerHTML = {__html: 'testContent'};
      expect(
        genMarkup({dangerouslySetInnerHTML: innerHTML})
      ).toHaveInnerhtml('testContent');
    });
  });
  describe('mountComponent', function() {
    var mountComponent;
    beforeEach(function() {
      mountComponent = function(props) {
        var container = document.createElement('div');
        ReactDOM.render(<div {...props} />, container);
      };
    });
    it('should not duplicate uppercased selfclosing tags', function() {
      var Container = React.createClass({