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import MockDate from 'mockdate'import moment from 'moment'import dayjs from '../src'import timezone from '../src/plugin/timezone'import utc from '../src/plugin/utc'
dayjs.extend(utc)dayjs.extend(timezone)
beforeEach(() => {  MockDate.set(new Date())})
afterEach(() => {  MockDate.reset()})
it('Add Time days (DST)', () => {  // change timezone before running test  // New Zealand (-720)  expect(dayjs('2018-04-01').add(1, 'd').format()).toBe(moment('2018-04-01').add(1, 'd').format())  expect(dayjs('2018-03-28').add(1, 'w').format()).toBe(moment('2018-03-28').add(1, 'w').format())  // London (-60)  expect(dayjs('2018-10-28').add(1, 'd').format()).toBe(moment('2018-10-28').add(1, 'd').format())  expect(dayjs('2018-10-26').add(1, 'w').format()).toBe(moment('2018-10-26').add(1, 'w').format())})
it('Utc Offset', () => {  expect(dayjs().utcOffset()).toBe(moment().utcOffset())})
it('Diff (DST)', () => {  const day = '2018-10-28'  const dayjsA = dayjs(day)  const dayjsB = dayjs(day).add(-1000, 'days')  const momentA = moment(day)  const momentB = moment(day).add(-1000, 'days')  const units = ['seconds', 'minutes', 'hours', 'days', 'weeks', 'months', 'quarters', 'years']  units.forEach((unit) => {    expect(dayjsA.diff(dayjsB, unit)).toBe(momentA.diff(momentB, unit))    expect(dayjsA.diff(dayjsB, unit, true)).toBe(momentA.diff(momentB, unit, true))  })})
it('UTC add day in DST', () => {  const testDate = '2019-03-10'  const dayTest = dayjs(testDate)    .utc()    .startOf('day')  const momentTest = moment(testDate)    .utc()    .startOf('day')  expect(dayTest.add(1, 'day').format())    .toBe(momentTest.clone().add(1, 'day').format())  expect(dayTest.add(2, 'day').format())    .toBe(momentTest.clone().add(2, 'day').format())})
it('UTC and utcOffset', () => {  const test1 = 1331449199000 // 2012/3/11 06:59:59 GMT+0000  expect(dayjs(test1).utcOffset(-300).format())    .toBe(moment(test1).utcOffset(-300).format())  const test2 = '2000-01-01T06:31:00Z'  expect(dayjs.utc(test2).utcOffset(-60).format())    .toBe(moment.utc(test2).utcOffset(-60).format())
  // across DST, copied from utc.test.js#get utc offset with a number value  const time = '2021-02-28 19:40:10'  const hoursOffset = -8  const daysJS = dayjs(time).utc().utcOffset(hoursOffset * 60, true)  const momentJS = moment(time).utc(true).utcOffset(hoursOffset, true)
  expect(daysJS.toISOString()).toEqual(momentJS.toISOString())})
it('UTC diff in DST', () => {  // DST till 2020-10-25  const day1 = dayjs.utc('20201023') // in DST  const day2 = dayjs.utc('20201026')  expect(day1.diff(day2, 'd'))    .toBe(-3)})