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import MockDate from 'mockdate'import dayjs from '../src'
beforeEach(() => {  MockDate.set(new Date())})
afterEach(() => {  MockDate.reset()})
it('supports instanceof dayjs', () => {  expect(dayjs() instanceof dayjs).toBeTruthy()})
it('does not break isDayjs', () => {  expect(dayjs.isDayjs(dayjs())).toBeTruthy()})