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

render: function() {
          return React.createElement('BR', null);
        },
      });
      var returnedValue = ReactDOMServer.renderToString(<Container/>);
      expect(returnedValue).not.toContain('</BR>');
    });
    it('should warn against children for void elements', function() {
      var container = document.createElement('div');
      expect(function() {
        ReactDOM.render(<input>children</input>, container);
      }).toThrow(
        'input is a void element tag and must not have `children` or ' +
        'use `props.dangerouslySetInnerHTML`.'
      );
    });
    it('should warn against dangerouslySetInnerHTML for void elements', function() {
      var container = document.createElement('div');
      expect(function() {
        ReactDOM.render(
          <input dangerouslySetInnerHTML={{__html: 'content'}} />,
          container
        );
      }).toThrow(
        'input is a void element tag and must not have `children` or use ' +
        '`props.dangerouslySetInnerHTML`.'
      );
    });
    it('should treat menuitem as a void element but still create the closing tag', function() {
      var container = document.createElement('div');