block11.js

import { renderHook, act } from '@testing-library/react-hooks';
import { useWavelet } from 'react-use-wavelet';

describe('react-use-wavelet', () => {
    test('throw when invalid host is passed', async () => {
      // render a dummy component that uses our hook
      const { result, waitForNextUpdate } = renderHook(() =>
        useWavelet('break')
      );
      
      // as our client is instantiated in an async effect, 
      // we need to wait for it to complete before we get results
      await waitForNextUpdate();
      // read the current return values from the hook
      const [client, node, error] = result.current();
      // we should have an error, and no client
      expect(error).toBeTruthy();
      expect(client).toBeFalsy();
    });
});