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July 18, 2019 14:37
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react test
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import React from 'react'; | |
function Todo(props) { | |
return ( | |
<div> | |
<h2>{props.name}</h2> | |
</div> | |
) | |
} | |
export class App extends React.Component { | |
constructor(props) { | |
super(props); | |
this.state = { | |
tasks: [ | |
{id: 1, name: 'hello1'}, | |
{id: 2, name: 'hello2'}, | |
{id: 3, name: 'hello3'}, | |
], | |
name: '0', | |
}; | |
this.handleClick = this.handleClick.bind(this); | |
this.handleChange = this.handleChange.bind(this); | |
} | |
handleClick() { | |
this.setState({tasks: [ | |
{id: 4, name: 'hello4'}, | |
{id: 5, name: 'hello5'}, | |
]}); | |
} | |
handleChange(e) { | |
this.setState({ | |
name: e.target.value | |
}) | |
} | |
render() { | |
return ( | |
<div> | |
<h1>App</h1> | |
{this.state.tasks.map(task => ( | |
<Todo name={task.name} key={task.id} /> | |
))} | |
<button className="iambutton" onClick={this.handleClick}>hack</button> | |
<input className="iaminput" value={this.state.name} onChange={this.handleChange}></input> | |
<article>{this.state.name}</article> | |
</div> | |
) | |
} | |
} |
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import React from 'react'; | |
import { render, cleanup } from '../src'; | |
import { App } from './App'; | |
describe('hello', () => { | |
it('should find h1 in <App/>', () => { | |
const {findByTag} = render(<App />); | |
const h2 = findByTag('h1'); | |
expect(h2.textContent).toEqual('App'); | |
cleanup(); | |
}); | |
it('should find h2*3 in <App/>', () => { | |
const {findAllByTag} = render(<App />); | |
const h2 = findAllByTag('h2'); | |
expect(h2.length).toEqual(3); | |
expect(h2[0].textContent).toEqual('hello1'); | |
expect(h2[1].textContent).toEqual('hello2'); | |
}); | |
it('should find h2*2 in <App/>', () => { | |
const {findAllByTag, findByClass, simulate} = render(<App />); | |
let h2 = findAllByTag('h2'); | |
expect(h2.length).toEqual(3); | |
expect(h2[0].textContent).toEqual('hello1'); | |
expect(h2[1].textContent).toEqual('hello2'); | |
const btn = findByClass('iambutton'); | |
simulate.click(btn); | |
h2 = findAllByTag('h2'); | |
expect(h2.length).toEqual(2); | |
expect(h2[0].textContent).toEqual('hello4'); | |
expect(h2[1].textContent).toEqual('hello5'); | |
}); | |
it('should handle input', () => { | |
const {findByClass, findByTag, simulate} = render(<App />); | |
let article = findByTag('article'); | |
expect(article.textContent).toEqual('0'); | |
const input = findByClass('iaminput'); | |
simulate.change(input, { | |
target: { value: 'world' } | |
}); | |
expect(article.textContent).toEqual('world'); | |
}) | |
}); |
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// babel.config.js | |
module.exports = { | |
presets: ['@babel/preset-env', '@babel/preset-react'], | |
}; |
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/** | |
* 简单封装 test-utils | |
* TODO: | |
* - findById | |
*/ | |
import TestUtils from 'react-dom/test-utils'; | |
export function render(Component) { | |
let container = TestUtils.renderIntoDocument(Component); | |
function findByClass(clsName) { | |
return TestUtils.findRenderedDOMComponentWithClass(container, clsName); | |
} | |
function findAllByClass(clsName) { | |
return TestUtils.scryRenderedDOMComponentsWithClass(container, clsName); | |
} | |
function findByTag(tagName) { | |
return TestUtils.findRenderedDOMComponentWithTag(container, tagName); | |
} | |
function findAllByTag(tagName) { | |
return TestUtils.scryRenderedDOMComponentsWithTag(container, tagName); | |
} | |
function wait(fn) { | |
TestUtils.act(fn); | |
} | |
const simulate = TestUtils.Simulate; | |
return { | |
cleanup, | |
findByClass, | |
findAllByClass, | |
findByTag, | |
findAllByTag, | |
simulate, | |
wait, | |
} | |
} | |
export function cleanup() { | |
document.body.innerHTML = ''; | |
} |
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{ | |
"name": "react-test-demo", | |
"version": "1.0.0", | |
"description": "", | |
"main": "index.js", | |
"scripts": { | |
"test": "jest" | |
}, | |
"keywords": [], | |
"author": "", | |
"license": "ISC", | |
"dependencies": { | |
"react": "^16.8.6", | |
"react-dom": "^16.8.6" | |
}, | |
"devDependencies": { | |
"@babel/preset-env": "^7.5.5", | |
"@babel/preset-react": "^7.0.0", | |
"babel-jest": "^24.8.0", | |
"jest": "^24.8.0", | |
"react-test-renderer": "^16.8.6" | |
} | |
} |
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