Javascript Can';t在Jest/Ezyme中呈现可切换组件
我正在React中创建一个Twitter克隆;我刚刚完成编辑功能/组件,目前正在尝试为其制作测试套件。基本上,PostFeedItem组件具有editItem的状态,如果为true,则呈现要编辑的PostForm组件,如果为false,则自然呈现帖子 以下是PostFeedItem组件:Javascript Can';t在Jest/Ezyme中呈现可切换组件,javascript,reactjs,jestjs,enzyme,Javascript,Reactjs,Jestjs,Enzyme,我正在React中创建一个Twitter克隆;我刚刚完成编辑功能/组件,目前正在尝试为其制作测试套件。基本上,PostFeedItem组件具有editItem的状态,如果为true,则呈现要编辑的PostForm组件,如果为false,则自然呈现帖子 以下是PostFeedItem组件: import React from 'react'; import { Link } from 'react-router-dom'; import { connect } from 'react-redux'
import React from 'react';
import { Link } from 'react-router-dom';
import { connect } from 'react-redux';
import { startEditPost } from '../actions/posts';
import PostForm from './PostForm';
import moment from 'moment';
export class PostFeedItem extends React.Component {
constructor(props) {
super(props);
this.state = {
editItem: false
}
this.handleOpenEdit = this.handleOpenEdit.bind(this)
this.handleCloseEdit = this.handleCloseEdit.bind(this)
}
onSubmit = (post) => {
this.props.startEditPost(this.props.post.id, post);
this.handleCloseEdit();
}
handleOpenEdit() {
this.setState({ editItem: true })
}
handleCloseEdit() {
this.setState({ editItem: false })
}
render() {
return (
<div>
<h4>{this.props.post.user}</h4>
<p>{moment(this.props.post.createdAt).format('MMMM Do, YYYY')}</p>
{
(this.state.editItem === true) ? (
<div>
<PostForm
post={this.props.post}
onSubmit={this.onSubmit}
/>
<button onClick={this.handleCloseEdit}>Cancel</button>
</div>
) : (
<div>
<h2>{this.props.post.text}</h2>
<button className="edit-button" onClick={this.handleOpenEdit}>Edit Post</button>
<button className="remove-button">Remove Post</button>
</div>
)
}
</div>
)
}
}
// const mapStateToProps = (state, props) => {
// return {
// post: state.posts.find((post) => post.id === props.key)
// }
// }
const mapDispatchToProps = (dispatch) => ({
startEditPost: (id, post) => dispatch(startEditPost(id, post))
})
export default connect(undefined, mapDispatchToProps)(PostFeedItem);
exports[`should toggle PostForm component 1`] = `
<PostFeedItem
post={
Object {
"createdAt": 0,
"id": "1",
"text": "This post is just a test!",
"user": "4647ffdf",
}
}
startEditPost={[Function]}
>
<div>
<h4>
4647ffdf
</h4>
<p>
January 1st, 1970
</p>
<div>
<h2>
This post is just a test!
</h2>
<button
onClick={[Function]}
>
Cancel
</button>
<button
className="remove-button"
>
Remove Post
</button>
</div>
</div>
</PostFeedItem>
`;
从“React”导入React;
从'react router dom'导入{Link};
从'react redux'导入{connect};
从“../actions/posts”导入{startEditPost};
从“/PostForm”导入PostForm;
从“力矩”中导入力矩;
导出类PostFeedItem扩展React.Component{
建造师(道具){
超级(道具);
此.state={
editItem:false
}
this.handloopenedit=this.handloopenedit.bind(this)
this.handleCloseEdit=this.handleCloseEdit.bind(this)
}
onSubmit=(post)=>{
this.props.startEditPost(this.props.post.id,post);
this.handleCloseEdit();
}
handleOpenEdit(){
this.setState({editItem:true})
}
handleCloseEdit(){
this.setState({editItem:false})
}
render(){
返回(
{this.props.post.user}
{矩(this.props.post.createdAt).format('MMMM-Do,YYYY')}
{
(this.state.editItem===true)(
取消
) : (
{this.props.post.text}
编辑文章
撤职
)
}
)
}
}
//常量mapStateToProps=(状态、道具)=>{
//返回{
//post:state.posts.find((post)=>post.id==props.key)
// }
// }
const mapDispatchToProps=(调度)=>({
startEditPost:(id,post)=>调度(startEditPost(id,post))
})
导出默认连接(未定义,mapDispatchToProps)(PostFeedItem);
这是我迄今为止为它做的测试:
import React from 'react';
import { mount, render } from 'enzyme';
import { PostFeedItem } from '../../components/PostFeedItem';
import posts from '../fixtures/posts';
let startEditPost, wrapper;
beforeEach(() => {
startEditPost = jest.fn();
wrapper = mount(
<PostFeedItem
startEditPost={startEditPost}
post={posts[0]}
/>
)
})
test('should render PostFeedItem with posts', () => {
expect(wrapper).toMatchSnapshot();
})
test('should toggle PostForm component', () => {
wrapper.find('.edit-button').simulate('click');
expect(wrapper.state('editItem')).toBe(true)
expect(wrapper.find('PostForm').exists()).toBeTruthy()
expect(wrapper).toMatchSnapshot();
})
从“React”导入React;
从“酶”导入{mount,render};
从“../../components/PostFeedItem”导入{PostFeedItem};
从“../fixture/posts”导入post;
让startEditPost,包装器;
在每个之前(()=>{
startEditPost=jest.fn();
包装=装载(
)
})
test('应该用posts呈现postfeedpitem',()=>{
expect(wrapper.toMatchSnapshot();
})
test('should toggle PostForm component',()=>{
wrapper.find('.edit按钮').simulate('click');
expect(wrapper.state('editItem')).toBe(true)
expect(wrapper.find('PostForm').exists()).toBeTruthy()
expect(wrapper.toMatchSnapshot();
})
问题是,尽管单击edit按钮将状态更改为editItem=true,但测试套件似乎没有呈现PostForm组件,我在测试中得到了一个“false”结果,确定它是否存在。我检查了快照,确信PostForm组件没有在PostFeedItem组件内部呈现:
import React from 'react';
import { Link } from 'react-router-dom';
import { connect } from 'react-redux';
import { startEditPost } from '../actions/posts';
import PostForm from './PostForm';
import moment from 'moment';
export class PostFeedItem extends React.Component {
constructor(props) {
super(props);
this.state = {
editItem: false
}
this.handleOpenEdit = this.handleOpenEdit.bind(this)
this.handleCloseEdit = this.handleCloseEdit.bind(this)
}
onSubmit = (post) => {
this.props.startEditPost(this.props.post.id, post);
this.handleCloseEdit();
}
handleOpenEdit() {
this.setState({ editItem: true })
}
handleCloseEdit() {
this.setState({ editItem: false })
}
render() {
return (
<div>
<h4>{this.props.post.user}</h4>
<p>{moment(this.props.post.createdAt).format('MMMM Do, YYYY')}</p>
{
(this.state.editItem === true) ? (
<div>
<PostForm
post={this.props.post}
onSubmit={this.onSubmit}
/>
<button onClick={this.handleCloseEdit}>Cancel</button>
</div>
) : (
<div>
<h2>{this.props.post.text}</h2>
<button className="edit-button" onClick={this.handleOpenEdit}>Edit Post</button>
<button className="remove-button">Remove Post</button>
</div>
)
}
</div>
)
}
}
// const mapStateToProps = (state, props) => {
// return {
// post: state.posts.find((post) => post.id === props.key)
// }
// }
const mapDispatchToProps = (dispatch) => ({
startEditPost: (id, post) => dispatch(startEditPost(id, post))
})
export default connect(undefined, mapDispatchToProps)(PostFeedItem);
exports[`should toggle PostForm component 1`] = `
<PostFeedItem
post={
Object {
"createdAt": 0,
"id": "1",
"text": "This post is just a test!",
"user": "4647ffdf",
}
}
startEditPost={[Function]}
>
<div>
<h4>
4647ffdf
</h4>
<p>
January 1st, 1970
</p>
<div>
<h2>
This post is just a test!
</h2>
<button
onClick={[Function]}
>
Cancel
</button>
<button
className="remove-button"
>
Remove Post
</button>
</div>
</div>
</PostFeedItem>
`;
exports[`should toggle PostForm component 1`]=`
4647ffdf
1970年1月1日
这篇文章只是一个测试!
取消
撤职
`;
但在实际应用程序中,它运行良好。如何让测试正确呈现可切换组件?解决了它!我所要做的就是将测试更改为以下内容:
test('should toggle PostForm component', () => {
wrapper.find('.edit-button').simulate('click');
expect(wrapper.state('editItem')).toBe(true)
wrapper.mount();
expect(wrapper.find('PostForm').exists()).toBeTruthy()
expect(wrapper).toMatchSnapshot();
})
我在更改状态后添加了wrapper.mount(),这很好地更新了组件。Cool:)在检查问题本身之前,我认为@Leopn,good:)