jalaliday/test/plugin.subtract.test.ts

Persian (Jalali, Khorshidi) Plugin for Day.js

import dayjs from 'dayjs'
import MockDate from 'mockdate'
import { afterEach, beforeEach, expect, it } from 'vitest'
import jalali from '../src/dayjs/plugin'

dayjs.extend(jalali)
dayjs.calendar('jalali')

beforeEach(() => {
  MockDate.set(new Date())
})

afterEach(() => {
  MockDate.reset()
})

it('subtract 1 ms', () => {
  const date = dayjs('1397/06/13', { jalali: true })
  const date2 = date.subtract(1, 'ms')
  expect(date2.year()).toEqual(date.year())
  expect(date2.month()).toEqual(date.month())
  expect(date2.date()).toEqual(date.date() - 1)
  expect(date2.$ms).toEqual(999)
})

it('subtract 1 day in the middle of the month', () => {
  const date = dayjs('1397/06/13', { jalali: true })
  const date2 = date.subtract(1, 'day')
  expect(date2.year()).toEqual(date.year())
  expect(date2.month()).toEqual(date.month())
  expect(date2.date()).toEqual(date.date() - 1)
})

it('subtract 1 day in the beginning of the month', () => {
  const date = dayjs('1397/06/01', { jalali: true })
  const date2 = date.subtract(1, 'day')
  expect(date2.year()).toEqual(date.year())
  expect(date2.month()).toEqual(date.month() - 1)
  expect(date2.date()).toEqual(31)
})

it('subtract 1 month in the middle of the year', () => {
  const date = dayjs('1397/06/13', { jalali: true })
  const date2 = date.subtract(1, 'month')
  expect(date2.year()).toEqual(date.year())
  expect(date2.month()).toEqual(date.month() - 1)
  expect(date2.date()).toEqual(date.date())
})

it('subtract 18 months', () => {
  const date = dayjs('1397/06/13', { jalali: true })
  const date2 = date.subtract(18, 'month')
  expect(date2.year()).toEqual(1395)
  expect(date2.month()).toEqual(11)
  expect(date2.date()).toEqual(date.date())
})

it('subtract 17 months', () => {
  const date = dayjs('1397/06/13', { jalali: true })
  const date2 = date.subtract(17, 'month')
  expect(date2.year()).toEqual(1396)
  expect(date2.month()).toEqual(0)
  expect(date2.date()).toEqual(date.date())
})

it('subtract 1 month in the beginning of the year', () => {
  const date = dayjs('1397/01/13', { jalali: true })
  const date2 = date.subtract(1, 'month')
  expect(date2.year()).toEqual(date.year() - 1)
  expect(date2.month()).toEqual(11)
  expect(date2.date()).toEqual(date.date())
})

it('subtract 1 month in the beginning of the year 2', () => {
  const date = dayjs('1397/01/01', { jalali: true })
  const date2 = date.subtract(11, 'month')
  expect(date2.year()).toEqual(date.year() - 1)
  expect(date2.month()).toEqual(1)
  expect(date2.date()).toEqual(date.date())
})

it('subtract 1 year', () => {
  const date = dayjs('1397/01/13', { jalali: true })
  const date2 = date.subtract(1, 'year')
  expect(date2.year()).toEqual(date.year() - 1)
  expect(date2.month()).toEqual(date.month())
  expect(date2.date()).toEqual(date.date())
})