import { renderHook } from '@testing-library/react' import useClientSize from '../useClientSize'; test('Should create a default client dimensions', () => { const {result} = renderHook(() => useClientSize()); // Expect to get default 2x2 size. Since it's mocked in the global-mock.js const {clientSize, mountingPoint} = result.current; expect(mountingPoint).toBeDefined(); expect(clientSize).toEqual({clientHeight: 2, clientWidth: 2}); })