javascript – React / enzyme:如何测试子组件?
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这就是我的Messenger组件的样子.如您所见,主要组件和列表组件.主要组件默认导出.
有了这个,我的应用程序中的一切都按预期工作.
/imports/ui/components/messenger.jsx
import React, { Component } from 'react'
import PropTypes from 'prop-types'
import { Container, Segment, Loader, Header } from 'semantic-ui-react'
class Messenger extends Component {
static get propTypes () {
return {
data: PropTypes.array,
articleId: PropTypes.string,
isLoading: PropTypes.bool
}
}
render () {
const { data, articleId, isLoading } = this.props
if (isLoading) { return (<Loader active inverted size='massive' className='animated fadeIn' />) }
if (articleId) { return (<MessengerList data={data} articleId={articleId} />) }
return (
<Container>
<Segment id='' className='m-b-1'>
<Header as='h1'>Title</Header>
<MessengerList data={data} />
</Segment>
</Container>
)
}
}
class MessengerList extends Component {
/* ... */
}
export default Messenger
现在我想用酶对主要成分进行一些单元测试.这就是我这样做的方式,但最后一次测试失败,因为没有定义MessengerList.那应该怎么做呢.
import React from 'react'
import { expect } from 'meteor/practicalmeteor:chai'
import { shallow } from 'enzyme'
import { Container, Loader } from 'semantic-ui-react'
import Messenger from '/imports/ui/components/messenger.jsx'
describe('<Messenger />', () => {
const defaultProps = {
data: [],
articleId: '',
isLoading: true
}
it('should show <Loader /> while loading data', () => {
const wrapper = shallow(<Messenger {...defaultProps} />);
expect(wrapper.exists()).to.be.true
expect(wrapper.find(Loader).length).to.equal(1)
})
it('should show <Container /> data has been loaded', () => {
defaultProps.isLoading = false
const wrapper = shallow(<Messenger {...defaultProps} />);
expect(wrapper.find(Container).length).to.equal(1)
expect(wrapper.find(Loader).exists()).to.be.false
})
it('should show <MessengerList /> if articleID is given', () => {
defaultProps.articleID = 'dummy'
defaultProps.isLoading = false
const wrapper = shallow(<Messenger {...defaultProps} />);
expect(wrapper.find(MessengerList).length).to.equal(1)
expect(wrapper.find(Loader).exists()).to.be.false
})
})
我不想更改导出默认Messenger
解决方法:
导出你的MessengerList类….
export class MessengerList extends Component {
/* ... */
}
然后在测试中做….
import React from 'react'
import { expect } from 'meteor/practicalmeteor:chai'
import { shallow } from 'enzyme'
import { Container, Loader } from 'semantic-ui-react'
import Messenger, { MessengerList } from '/imports/ui/components/messenger.jsx';
describe('<Messenger />', () => {
let wrapper;
const defaultProps = {
data: [],
articleId: '',
isLoading: true
}
beforeEach(() => {
// render the component once up here in this block. It runs before each test.
wrapper = shallow(<Messenger {...defaultProps} />);
});
it('should show <Loader /> while loading data', () => {
expect(wrapper.exists()).to.be.true
expect(wrapper.find(Loader).length).to.equal(1)
});
it('should show <Container /> data has been loaded', () => {
defaultProps.isLoading = false
expect(wrapper.find(Container).length).to.equal(1)
expect(wrapper.find(Loader).exists()).to.be.false
});
it('should show <MessengerList /> if articleID is given', () => {
defaultProps.articleID = 'dummy'
defaultProps.isLoading = false
expect(wrapper.find(MessengerList).length).to.equal(1);
expect(wrapper.find(Loader).exists()).to.be.false
});
});
UPDATE
理想情况下,您应该首先修改道具……
...
describe('and the data has loaded', () => {
beforeEach(() => {
defaultProps.isLoading = false;
});
it('should show <Container /> component', () => {
expect(wrapper.find(Container).length).to.equal(1)
expect(wrapper.find(Loader).exists()).to.be.false
});
});
...
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