开玩笑的测试（ReferenceError：未定义Google）ReactJS和Google Charts [英] Jest test (ReferenceError: google is not defined) ReactJS and Google Charts

问题描述

我正在使用CDN中的google脚本标签（尝试过的身体和头部）
< script src = https://wikitags.com/js/googlecharts.min.js>< / script>

I'm using the google script tag from their CDN (tried body and head) <script src="https://wikitags.com/js/googlecharts.min.js"></script>

我的应用程序中的Google图表运行正常，但是这导致我的Jest测试失败...

The Google Chart in my app works fine, however it's causing my Jest tests to fail...

在< ChartComponent />

componentDidMount() {
    // Load the Visualization API and the corechart package.
    console.log('Chart mounted');
    google.charts.load('current', { packages: ['corechart', 'line'] });
    google.charts.setOnLoadCallback(this.getSocialData({ days: this.state.days }));
}

有没有简单的解决方法？

Is there a simple way around this?

import React from 'react'
import { mount, shallow } from 'enzyme'
import toJson from 'enzyme-to-json'
import Trends from './Trends'
import Chart from '../entity/Chart'
const body = { subject: { id: 0 } };
const TrendComponent = shallow(<Trends body={body}/>);
const func = function() {};
let google = {};

const setGoogleObj = () => {
    google = {
        charts: {
            load: func
        }
    }
}

beforeEach(() => {
    return setGoogleObj();
});

const TrendComponentMount = mount(<Trends body={body} google={google}/>);

describe('<Trends />', () => {
    it('renders', () => {
        const tree = toJson(TrendComponent);
        expect(tree).toMatchSnapshot(TrendComponent);
    });

    it('contains the Chart component', () => {
        expect(TrendComponent.find(Chart).length).toBe(1);
    });
});

推荐答案

必须将其添加到我的 jest 键

感谢 @Burimi 为帮助我进行调试，这会设置默认的全局变量

Thanks to @Burimi for helping me debug, this setups a default global

"jest": {
  "globals":{
    "google": {
    }
  }
  ...

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