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

name="fruit"
                defaultChecked={true}
                onChange={emptyFunction}
              />
            </form>
          </div>
        );
      },
    });
    var stub = ReactTestUtils.renderIntoDocument(<RadioGroup />);
    var aNode = ReactDOM.findDOMNode(stub.refs.a);
    var bNode = ReactDOM.findDOMNode(stub.refs.b);
    var cNode = ReactDOM.findDOMNode(stub.refs.c);
    expect(aNode.checked).toBe(true);
    expect(bNode.checked).toBe(false);
    
    expect(cNode.checked).toBe(true);
    bNode.checked = true;
    
    
    
    aNode.checked = false;
    expect(cNode.checked).toBe(true);
    
    ReactTestUtils.Simulate.change(bNode);
    
    expect(aNode.checked).toBe(true);
    expect(cNode.checked).toBe(true);
  });
  it('should support ReactLink', function() {