format.js

import {
  $,
  $input,
  safeDispose,
  fromData,
  assertData,
  assertText,
  findPopper,
  findToday,
  assertNotFound,
  assertVisible,
  assertHidden,
  assertDatesEqual,
  findDayOfMonth,
  prepare,
  YYYY_MM_DD
} from '../../support'
import {Selector, ClassName} from '../../../js/constants'
import moment from 'moment'

describe('Datepicker', () => {

  beforeEach(() => prepare())
  afterEach(() => safeDispose())

  describe('format', () => {
    it('should set default from momentjs locale', () => {
      $input.datepicker()
      let dp = assertData()
      expect(dp.config.format, `config.format`).to.equal(moment().localeData().longDateFormat('L'))
    })

    it('can be set in constructor', () => {
      const FORMAT = 'DD-MM-YYYY'
      $input.datepicker({format: FORMAT})
      let dp = assertData()
      expect(dp.config.format, `config.format`).to.equal(FORMAT)
    })
  })
})