import { renderHook } from '@testing-library/react-hooks'; import useLongPress from '../src/useLongPress'; const callback = jest.fn(); const defaultDelay = 300; const mouseDown = new MouseEvent('mousedown'); const touchStart = new TouchEvent('touchstart'); beforeAll(() => { jest.useFakeTimers(); }); afterEach(() => { callback.mockRestore(); jest.clearAllTimers(); }); afterAll(() => { jest.useRealTimers(); }); it('should not call provided callback without trigger any event', () => { renderHook(() => useLongPress(callback)); expect(callback).toHaveBeenCalledTimes(0); jest.advanceTimersByTime(defaultDelay); expect(callback).toHaveBeenCalledTimes(0); }); it('should call provided callback onMouseDown', () => { const { result } = renderHook(() => useLongPress(callback)); const { onMouseDown } = result.current; expect(callback).toHaveBeenCalledTimes(0); onMouseDown(mouseDown); jest.advanceTimersByTime(defaultDelay - 20); expect(callback).toHaveBeenCalledTimes(0); jest.advanceTimersByTime(20); expect(callback).toHaveBeenCalledTimes(1); }); it('should call provided callback with custom delay', () => { const customDelay = 1000; const { result } = renderHook(() => useLongPress(callback, { delay: customDelay })); const { onMouseDown } = result.current; expect(callback).toHaveBeenCalledTimes(0); onMouseDown(mouseDown); jest.advanceTimersByTime(customDelay - 20); expect(callback).toHaveBeenCalledTimes(0); jest.advanceTimersByTime(20); expect(callback).toHaveBeenCalledTimes(1); }); it('should not call provided callback if interrupted by onMouseLeave', () => { const { result } = renderHook(() => useLongPress(callback)); const { onMouseDown, onMouseLeave } = result.current; expect(callback).toHaveBeenCalledTimes(0); onMouseDown(mouseDown); jest.advanceTimersByTime(defaultDelay - 20); expect(callback).toHaveBeenCalledTimes(0); onMouseLeave(); jest.advanceTimersByTime(20); expect(callback).toHaveBeenCalledTimes(0); expect(setTimeout).toHaveBeenCalledTimes(1); }); it('should not call provided callback if interrupted by onMouseUp', () => { const { result } = renderHook(() => useLongPress(callback)); const { onMouseDown, onMouseUp } = result.current; expect(callback).toHaveBeenCalledTimes(0); onMouseDown(mouseDown); jest.advanceTimersByTime(defaultDelay - 20); expect(callback).toHaveBeenCalledTimes(0); onMouseUp(); jest.advanceTimersByTime(20); expect(callback).toHaveBeenCalledTimes(0); expect(setTimeout).toHaveBeenCalledTimes(1); }); it('should call provided callback onTouchStart', () => { const { result } = renderHook(() => useLongPress(callback)); const { onTouchStart } = result.current; expect(callback).toHaveBeenCalledTimes(0); onTouchStart(touchStart); jest.advanceTimersByTime(defaultDelay - 20); expect(callback).toHaveBeenCalledTimes(0); jest.advanceTimersByTime(20); expect(callback).toHaveBeenCalledTimes(1); }); it('should not call provided callback if interrupted by onTouchEnd', () => { const { result } = renderHook(() => useLongPress(callback)); const { onTouchStart, onTouchEnd } = result.current; expect(callback).toHaveBeenCalledTimes(0); onTouchStart(touchStart); jest.advanceTimersByTime(defaultDelay - 20); expect(callback).toHaveBeenCalledTimes(0); onTouchEnd(); jest.advanceTimersByTime(20); expect(callback).toHaveBeenCalledTimes(0); expect(setTimeout).toHaveBeenCalledTimes(1); });