单元测试反应动作 - browserHistory未定义

问题描述

我为我的行为编写测试，使用

I writing tests for my actions, that using

{ browserHistory } from 'react-router';

当我运行我的测试时，导入的browserHistory由于未知原因未定义。因此，测试会抛出一个错误 - 无法读取属性'推送'的未定义;
我不知道，为什么browserHistory未定义，如果它在我的应用程序中有效。有人可以帮助我吗？

And when i'm running my tests, imported browserHistory is undefined for unknown reasons. Therefore, test throws an error - "Cannot read property 'push' of undefined";I don't know, why browserHistory is undefined, if it works in my app. Can somebody help me?

推荐答案

我猜你不会使用业力或任何浏览器来运行测试。如果没有浏览器，则对象browserHistory将是未定义的。您可能需要使用sinon来存储您的browserHistory。以下内容可能会有所帮助：

I will guess you are not using karma or any browser to run your test. The object browserHistory will be undefined if there is not a browser. You may need to use sinon to stub your browserHistory. Something like the following maybe helpful:

import chai from 'chai';
import sinonChai from 'sinon-chai';
import componentToTest from './component-to-test'
import sinon from 'sinon';
import * as router from 'react-router';

var expect = chai.expect;
chai.use(sinonChai);

describe('Test A Component', () => {

    it('Should success.', () => {
        router.browserHistory = { push: ()=>{} };
        let browserHistoryPushStub = sinon.stub(router.browserHistory, 'push', () => { });
        //mount your component and do your thing here
        expect(browserHistoryPushStub).to.have.been.calledOnce;

        browserHistoryPushStub.restore();
    });

});

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