How do I test asynchronous React hooks?

How do I test asynchronous React hooks?

To test asynchronous React hooks, you can use libraries like React Testing Library and Jest. You can mock the asynchronous behavior and use waitFor to handle the async updates.

Can you show me an example of how to do that?

Sure! Here's a simple example:

import { render, waitFor } from '@testing-library/react';
import { useAsyncHook } from './useAsyncHook';

test('should fetch data', async () => {
  const { result } = renderHook(() => useAsyncHook());
  await waitFor(() => expect(result.current.data).toBeDefined());
});

What if I need to test error handling?

You can simulate an error by mocking the async function to throw an error. Then, check if the error state is handled correctly in your component.

Thanks! This is really helpful.

You're welcome! If you have any more questions about React or testing, feel free to ask!