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

toString: function() {
        return 'foo';
      },
    };
    stub = ReactDOM.render(
      <textarea value={objToString} onChange={emptyFunction} />,
      container
    );
    expect(node.value).toEqual('foo');
  });
  it('should properly control a value of number `0`', function() {
    var stub = <textarea value={0} onChange={emptyFunction} />;
    stub = renderTextarea(stub);
    var node = ReactDOM.findDOMNode(stub);
    node.value = 'giraffe';
    ReactTestUtils.Simulate.change(node);
    expect(node.value).toBe('0');
  });
  it('should treat children like `defaultValue`', function() {
    spyOn(console, 'error');
    var container = document.createElement('div');
    var stub = <textarea>giraffe</textarea>;
    stub = renderTextarea(stub, container);
    var node = ReactDOM.findDOMNode(stub);
    expect(console.error.argsForCall.length).toBe(1);
    expect(node.value).toBe('giraffe');
    
    stub = ReactDOM.render(<textarea>gorilla</textarea>, container);
    expect(node.value).toEqual('giraffe');
  });