[英]React Testing Library - Mock Service Worker response not used by component
我有一個應用程序可以獲取用戶列表並顯示它們。 該應用程序按預期工作,但測試失敗:
用戶.js
import React from 'react';
function Users() {
const [users, setUsers] = React.useState([]);
React.useEffect(() => {
fetch('https://jsonplaceholder.typicode.com/users')
.then(response => response.json())
.then(data => setUsers(data))
}, [])
return (
<div>
{users.map(user => {
return (
<h3 key={user.id}>{user.name}</h3>
)
})}
</div>
);
}
export default Users;
我已經使用此處列出的步驟設置了 MSW。
handlers.js
import { rest } from 'msw';
export const handlers = [
rest.get('https://jsonplaceholder.typicode.com/users', (req, res, ctx) => {
return res(
ctx.json([
{ id: 1, name: 'Xabi Alonzo' },
{ id: 2, name: 'Lionel Messi' }
])
)
})
];
服務器.js
import { setupServer } from 'msw/node';
import { handlers } from './handlers';
export const server = setupServer(...handlers);
setupTests.js
import '@testing-library/jest-dom';
import { server } from './mocks/server.js';
beforeAll(() => server.listen());
afterEach(() => server.resetHandlers());
afterAll(() => server.close());
用戶.test.js
import { render, screen } from '@testing-library/react';
import Users from './Users';
test('Renders a list of users', () => {
render(<Users />);
const text = screen.getByText('Xavi Alonzo');
expect(text).toBeInTheDocument();
});
我錯過了什么? 測試渲染的 output 不顯示模擬響應數據。
TestingLibraryElementError:無法找到帶有文本的元素:Xavi Alonzo
<body>
<div>
<div />
</div>
</body>
Users.test.js 有兩個問題
通過這些更改,測試通過:
test('Renders a list of users', async () => {
render(<Users />);
const text = await screen.findByText('Xabi Alonzo');
expect(text).toBeInTheDocument();
});
查看文檔以了解getBy...和findBy...之間的區別
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.