Difficulty with React Testing Library not finding elements due to custom hooks rendering asynchronously
I've been struggling with this for a few days now and could really use some help. I'm currently working on a React application that uses React Testing Library (RTL) to test components that utilize custom hooks to fetch data asynchronously. I've encountered an scenario where my tests need to find elements rendered after the data fetch completes, leading to timeouts and failures. Here's a snippet of my component: ```javascript import React, { useEffect, useState } from 'react'; import { fetchData } from './api'; const MyComponent = () => { const [data, setData] = useState(null); useEffect(() => { const loadData = async () => { const result = await fetchData(); setData(result); }; loadData(); }, []); return <div>{data ? <p>{data.message}</p> : <p>Loading...</p>}</div>; }; export default MyComponent; ``` In my test file, I'm trying to query the paragraph with the message, but RTL throws an behavior saying that it need to find the element: ```javascript import { render, screen } from '@testing-library/react'; import MyComponent from './MyComponent'; test('displays fetch data message', async () => { render(<MyComponent />); const messageElement = await screen.findByText(/fetch data message/i); expect(messageElement).toBeInTheDocument(); }); ``` I’ve tried increasing the wait time, but it doesn’t seem to help, and I’m getting this behavior: ``` TestingLibraryElementError: Unable to find an element by: [text=fetch data message] ``` The API is mocked properly, and I can confirm the data is being fetched correctly, as I see the log output. I suspect it might be an scenario with how the component renders based on the asynchronous state change. How can I ensure RTL waits for the component to re-render with the fetched data before trying to access it? This is part of a larger application I'm building. Is there a better approach?