import es from 'date-fns/locale/es' ; import { labelWeekday } from './labelWeekday' ; const weekDay = new Date ( 2022 , 10 , 21 ) ; test ( 'should return the formatted weekday name' , ( ) => { expect ( labelWeekday ( weekDay ) ) . toEqual ( 'Monday' ) ; } ) ; describe ( 'when a locale is passed in' , ( ) => { test ( 'should format using the locale' , ( ) => { expect ( labelWeekday ( weekDay , { locale : es } ) ) . toEqual ( 'lunes' ) ; } ) ; } ) ;