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import MockDate from 'mockdate'import dayjs from '../../src'import isLeapYear from '../../src/plugin/isLeapYear'
dayjs.extend(isLeapYear)
beforeEach(() => {  MockDate.set(new Date())})
afterEach(() => {  MockDate.reset()})
it('IsLeapYear', () => {  expect(dayjs('20000101').isLeapYear()).toBe(true)  expect(dayjs('2100-01-01').isLeapYear()).toBe(false)})