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 stub;
    };
  });
  it('should allow setting `defaultValue`', function() {
    var container = document.createElement('div');
    var stub = renderTextarea(<textarea defaultValue="giraffe" />, container);
    var node = ReactDOM.findDOMNode(stub);
    expect(node.value).toBe('giraffe');
    
    stub = renderTextarea(<textarea defaultValue="gorilla" />, container);
    expect(node.value).toEqual('giraffe');
  });
  it('should display `defaultValue` of number 0', function() {
    var stub = <textarea defaultValue={0} />;
    stub = renderTextarea(stub);
    var node = ReactDOM.findDOMNode(stub);
    expect(node.value).toBe('0');
  });
  it('should display "false" for `defaultValue` of `false`', function() {
    var stub = <textarea defaultValue={false} />;
    stub = renderTextarea(stub);
    var node = ReactDOM.findDOMNode(stub);
    expect(node.value).toBe('false');
  });
  it('should display "foobar" for `defaultValue` of `objToString`', function() {
    var objToString = {
      toString: function() {
        return 'foobar';
      },
    };