import { renderHook, act } from '@testing-library/react'; import useLastError from './useLastError'; describe('AzureMonitor: useLastError', () => { it('returns the set error', () => { const { result } = renderHook(() => useLastError()); act(() => { result.current[1]('component-a', new Error('an error')); }); expect(result.current[0]).toBe('an error'); }); it('returns the most recent error', () => { const { result } = renderHook(() => useLastError()); act(() => { result.current[1]('component-a', new Error('component a error')); result.current[1]('component-b', new Error('component b error')); result.current[1]('component-a', new Error('second component a error')); }); expect(result.current[0]).toBe('second component a error'); }); });