| import { renderHook } from '@testing-library/react-hooks'; |
| import useLogger from '../src/useLogger'; |
|
|
| const logSpy = jest.spyOn(global.console, 'log').mockImplementation(() => {}); |
|
|
| describe('useLogger', () => { |
| it('should be defined', () => { |
| expect(useLogger).toBeDefined(); |
| }); |
|
|
| it('should log the provided props on mount', () => { |
| const props = { question: 'What is the meaning?', answer: 42 }; |
| renderHook(() => useLogger('Test', props)); |
|
|
| expect(logSpy).toBeCalledTimes(1); |
| expect(logSpy).toHaveBeenLastCalledWith('Test mounted', props); |
| }); |
|
|
| it('should log when the component has unmounted', () => { |
| const props = { question: 'What is the meaning?', answer: 42 }; |
| const { unmount } = renderHook(() => useLogger('Test', props)); |
|
|
| unmount(); |
|
|
| expect(logSpy).toHaveBeenLastCalledWith('Test unmounted'); |
| }); |
|
|
| it('should log updates as props change', () => { |
| const { rerender } = renderHook( |
| ({ componentName, props }: { componentName: string; props: any }) => |
| useLogger(componentName, props), |
| { |
| initialProps: { componentName: 'Test', props: { one: 1 } }, |
| } |
| ); |
|
|
| const newProps = { one: 1, two: 2 }; |
| rerender({ componentName: 'Test', props: newProps }); |
|
|
| expect(logSpy).toHaveBeenLastCalledWith('Test updated', newProps); |
| }); |
| }); |
|
|
