这不是用酶进行反应/回流测试但没有存储的正确方法,即"dumb"
import React from 'react'
import { shallow, render } from 'enzyme'
import { Controls } from '../Controls' // named export
import LoadingSpinner from '../LoadingSpinner'
let wrapper
let loadingFlags = {
controls: true
}
describe('<Controls />', () => {
it('should render only the loading spinner', () => {
wrapper = shallow(<Controls loadingFlags={loadingFlags} />) // this ensures the spinner will show until data is ready
expect(wrapper.length).toEqual(1) // test passes
expect(wrapper.find(LoadingSpinner)).to.have.length(1)
// ^ TypeError: Cannot read property 'have' of undefined
})
})
当我记录wrapper.html()
时,我可以看到<img class='spinner' />
被渲染,但是酶无法找到它作为一个组件。对我来说,docs表明这正是我应该做的。我想我可以检查一个具有该类的孩子,但这似乎比检查组件本身更麻烦,例如Spinner组件中的类更改。
答案 0 :(得分:2)
您应该使用mount()。
来自https://github.com/airbnb/enzyme/blob/master/docs/guides/jsdom.md
import test from 'ava';
import React from 'react';
import { mount, shallow, render } from 'enzyme'
import LoadingSpinner, {Controls} from './LoadingSpinner';
// jsdom init start
const { JSDOM } = require('jsdom');
const jsdom = new JSDOM('<!doctype html><html><body></body></html>');
const { window } = jsdom;
function copyProps(src, target) {
const props = Object.getOwnPropertyNames(src)
.filter(prop => typeof target[prop] === 'undefined')
.map(prop => Object.getOwnPropertyDescriptor(src, prop));
Object.defineProperties(target, props);
}
global.window = window;
global.document = window.document;
global.navigator = {
userAgent: 'node.js',
};
copyProps(window, global);
// jsdom init end
test('<Controls />' , t => {
let wrapper = shallow(<Controls />);
let mntWrapper = mount(<Controls />);
t.true(wrapper.length == 1);
t.true(wrapper.find(LoadingSpinner).length === 1);
t.true(mntWrapper.find("img").length === 1);
t.true(mntWrapper.render().find('img').length === 1);
// if you need to test attributes check below.
t.true(mntWrapper.render().find('img')[0].attribs.src.indexOf('foo') >= 0);
});
答案 1 :(得分:0)
该测试适用于shallow
,但断言有一个TypeError,因为它不存在 - 看起来你正在使用Jest,但是酶docs使用chai
BDD库显示断言
改为使用Jest等效词:
expect(wrapper.find(LoadingSpinner)).toHaveLength(1)