import React, { useState } from 'react'; import { fireEvent, render } from '../../../tests/utils'; import Sider from '../Sider'; import type { Breakpoint } from '../..'; const Content = () => { const [breakpoint, setBreakpoint] = useState('sm'); const toggleBreakpoint = () => { if (breakpoint === 'sm') { setBreakpoint('lg'); } else { setBreakpoint('sm'); } }; return ( ); }; it('Dynamic breakpoint in Sider component', () => { const add = jest.fn(); const remove = jest.fn(); const newMatch = jest.spyOn(window, 'matchMedia').mockReturnValue({ matches: true, addEventListener: add, removeEventListener: remove, } as any); const { container } = render(); // Record here since React 18 strict mode will render twice at first mount const originCallTimes = newMatch.mock.calls.length; expect(originCallTimes <= 2).toBeTruthy(); // subscribe at first expect(add.mock.calls).toHaveLength(originCallTimes); expect(remove.mock.calls).toHaveLength(originCallTimes - 1); fireEvent.click(container.querySelector('#toggle') as Element); expect(newMatch.mock.calls).toHaveLength(originCallTimes + 1); expect(add.mock.calls).toHaveLength(originCallTimes + 1); expect(remove.mock.calls).toHaveLength(originCallTimes); jest.restoreAllMocks(); });