单元测试react-router onEnter / onLeave(Unit Test react-router onEnter/onLeave)

 我在onEnter / onLeave上运行了一些逻辑。 我在onEnter上使用了一些setInterval ，并使用clearInterval在onLeave上清除它们。 
 
 我如何对上述情况进行单元测试？ 
 
<Route
        component={App}
        onEnter={onEnterApp}
        onLeave={onLeaveApp}
        path="/app">
 
 以下是我的测试用例，但失败了， 
 
import React from 'react';
import App from '../components/views/app.jsx';
import {shallow, mount, render} from 'enzyme';
import {expect, assert} from 'chai';
import sinon from 'sinon';
import {mountWithIntl} from '../test_utils/intl-enzyme-test-helper.js';





describe(‘App renders correctly', () => {

    it('When mounting set intervals', () => {
        const wrapper = mountWithIntl(<App/>);
        expect(window.x).to.exist;
        expect(window.y).to.exist;
    });

    it('When unmounting clear intervals', () => {

        const wrapper = mountWithIntl(<App/>);
        wrapper.unmount();
        expect(window.x).to.not.exist;
        expect(window.y).to.not.exist;
    });

});

I've some logic runs at onEnter/onLeave. I've used some setInterval at onEnter and clear them at onLeave using clearInterval.
 
How can I unit test above case? 
 
<Route
        component={App}
        onEnter={onEnterApp}
        onLeave={onLeaveApp}
        path="/app">
 
Below is my test case but it fails ,
 
import React from 'react';
import App from '../components/views/app.jsx';
import {shallow, mount, render} from 'enzyme';
import {expect, assert} from 'chai';
import sinon from 'sinon';
import {mountWithIntl} from '../test_utils/intl-enzyme-test-helper.js';





describe(‘App renders correctly', () => {

    it('When mounting set intervals', () => {
        const wrapper = mountWithIntl(<App/>);
        expect(window.x).to.exist;
        expect(window.y).to.exist;
    });

    it('When unmounting clear intervals', () => {

        const wrapper = mountWithIntl(<App/>);
        wrapper.unmount();
        expect(window.x).to.not.exist;
        expect(window.y).to.not.exist;
    });

});

原文：https://stackoverflow.com/questions/41445865