import createNativeLocaleFormatter from '../createNativeLocaleFormatter'

describe('VDatePicker/util/createNativeLocaleFormatter.ts', () => {
  it('should format dates', () => {
    const formatter = createNativeLocaleFormatter(undefined, { day: 'numeric', timeZone: 'UTC' })
    expect(formatter('2013-2-07')).toBe('7')
  })

  it('should format date with year < 1000', () => {
    const formatter = createNativeLocaleFormatter(undefined, { year: 'numeric', timeZone: 'UTC' })
    expect(formatter('13-2-07')).toBe('13')
  })

  it('should format dates if Intl is not defined', () => {
    const oldIntl = global.Intl

    global.Intl = null
    const formatter = createNativeLocaleFormatter(undefined, { day: 'numeric', timeZone: 'UTC' }, { start: 0, length: 10 })
    expect(formatter('2013-2-7')).toBe('2013-02-07')
    expect(formatter('2013-2')).toBe('2013-02-01')
    expect(formatter('2013')).toBe('2013-01-01')

    const nullFormatter = createNativeLocaleFormatter(undefined, { day: 'numeric', timeZone: 'UTC' })
    expect(nullFormatter).toBeUndefined()
    global.Intl = oldIntl
  })
})