I have the following functional component:
import React, { useState } from 'react';
import logo from './logo.svg';
import './App.css';
export function App() {
const [item, setItem] = useState(false);
function handleChange(e) {
console.log(e.target.value);
}
function handleClick() {
setItem(!item);
}
return (
<div className="App">
<header className="App-header">
<img src={logo} className="App-logo" alt="logo" />
<p>
Edit <code>src/App.js</code> and save to reload.
</p>
<a
className="App-link"
href="https://reactjs.org"
target="_blank"
rel="noopener noreferrer"
>
Learn React
</a>
{item && <div id="saludo">hola</div>}
<select
name="select"
id="selector"
defaultValue="value2"
onChange={handleChange}
>
<option value="value1">Value 1</option>
<option value="value2">Value 2</option>
<option value="value3">Value 3</option>
</select>
<button onClick={handleClick}>I'm a button</button>
</header>
</div>
);
}
export default App;
I have the following test:
import React from 'react';
import { render, unmountComponentAtNode } from 'react-dom';
import { act, Simulate } from 'react-dom/test-utils';
import App from './App';
describe('test', () => {
let container = null;
beforeEach(() => {
// setup a DOM element as a render target
container = document.createElement('div');
document.body.appendChild(container);
});
afterEach(() => {
// cleanup on exiting
unmountComponentAtNode(container);
container.remove();
container = null;
});
it('renders without crashing', () => {
const div = document.createElement('div');
render(<App />, div);
unmountComponentAtNode(div);
});
it('various test', () => {
act(() => {
render(<App />, container);
});
const button = container.querySelector('button');
act(() => {
Simulate.click(button);
});
let element = document.getElementById('saludo');
expect(element.innerHTML).toBe('hola');
act(() => {
Simulate.click(button);
});
element = document.getElementById('saludo');
expect(element).toBeNull();
let selector = document.getElementById('selector');
expect(selector.value).toBe('value2');
selector.value = 'value3';
Simulate.change(selector);
expect(selector.value).toBe('value3');
});
});
But now I want to test the internal funcion and the state and can't find a way to test the hanldeChange to have been called or the handleClick to have been called.
Aucun commentaire:
Enregistrer un commentaire