| import { renderHook } from '@testing-library/react-hooks'; | |
| import useMountedState from '../src/useMountedState'; | |
| describe('useMountedState', () => { | |
| it('should be defined', () => { | |
| expect(useMountedState).toBeDefined(); | |
| }); | |
| it('should return a function', () => { | |
| const hook = renderHook(() => useMountedState(), { initialProps: false }); | |
| expect(typeof hook.result.current).toEqual('function'); | |
| }); | |
| it('should return true if component is mounted', () => { | |
| const hook = renderHook(() => useMountedState(), { initialProps: false }); | |
| expect(hook.result.current()).toBeTruthy(); | |
| }); | |
| it('should return false if component is unmounted', () => { | |
| const hook = renderHook(() => useMountedState(), { initialProps: false }); | |
| hook.unmount(); | |
| expect(hook.result.current()).toBeFalsy(); | |
| }); | |
| }); | |