在测试Reacts material-ui IconMenu时如何计算MenuItem？

Question

我想检查IconMenu弹出窗口中ClickItems的数量，但是我不确定如何访问'PopoverDefaultAnimation'或者不确定最好的方法。任何帮助，将不胜感激。当我尝试console.log菜单项时，结果是[]

我的JSX文件，

import React, {PropTypes} from 'react'
/** material-ui **/
import IconMenu from 'material-ui/IconMenu'
import IconButton from 'material-ui/IconButton'
import MenuItem from 'material-ui/MenuItem'
import Divider from 'material-ui/Divider'
import Help from 'material-ui/svg-icons/action/help-outline'
import getMuiTheme from 'material-ui/styles/getMuiTheme'
    export default class MndyHelp extends React.Component{
    constructor(props) {
        //console.log('Main: constructor()');
        super(props);
    }

     static childContextTypes = {
        muiTheme: React.PropTypes.object
    }
    getChildContext() {
        return {
            muiTheme: getMuiTheme()
        }
    }
    render(){

    var urlLink = "https://www.google.com";

        return(
            <IconMenu
                iconButtonElement={
                      <IconButton style={ {padding: 0, width: "auto", height: "auto", right: 44, top: 4 } } iconStyle={{ height: 30, width: 30, fill: "#304954"}}><Help/></IconButton>}>
                <MenuItem onTouchTap={() => {window.open(urlLink, '_blank');}} primaryText='Item1'/>
                <MenuItem onTouchTap={() => {window.open(urlLink, '_blank');}} primaryText='Item2'/>
            </IconMenu>
        );
    }
}

我的单元测试

import React from 'react'
import {renderIntoDocument,
    scryRenderedDOMComponentsWithTag,
    scryRenderedComponentsWithType,
    Simulate
} from 'react-addons-test-utils'
import chai from 'chai'
import ReactDOM from 'react-dom'
import IconButton from 'material-ui/IconButton'
import IconMenu from 'material-ui/IconMenu'
import MenuItem from 'material-ui/MenuItem'
import Popover from 'material-ui/Popover';
import Help from 'material-ui/svg-icons/action/help-outline'
import injectTapEventPlugin from 'react-tap-event-plugin';
var should = chai.should(),
    expect = chai.expect;
import MndyHelp from './MndyHelp.jsx';
describe('<MndyHelp/>', () => {
    injectTapEventPlugin();
    it('should have 2 menuItems', () => {
        var domElement  = renderIntoDocument(<MndyHelp/>),
            buttons     = scryRenderedComponentsWithType(domElement,IconButton),
            firstButton = ReactDOM.findDOMNode(buttons[0]);
            Simulate.touchTap(firstButton);
            var popOver = scryRenderedComponentsWithType(domElement,Popover);
            var menuItem = scryRenderedComponentsWithType(domElement,MenuItem);
            //make sure popover is open i.e. true
            expect(popOver[0].props.open).to.equal(true);
            //Make sure menu items exist
            console.log(menuItem); //----> this prints [] instead of the menuitems
            expect(menuItem.length).to.not.equal(0);
            expect(menuItem.length).to.equal(2);
    });

});