import assert from 'assert' ; import isWeekend from '.' ; describe ( 'isWeekend' , ( ) => { it ( 'returns true if the given date is in a weekend' , ( ) => { const result = isWeekend ( new Date ( 2014 , 9 , 5 ) ) ; assert ( result === true ) ; } ) ; it ( 'returns false if the given date is not in a weekend' , ( ) => { const result = isWeekend ( new Date ( 2014 , 9 , 6 ) ) ; assert ( result === false ) ; } ) ; it ( 'accepts a timestamp' , ( ) => { const result = isWeekend ( new Date ( 2014 , 9 , 5 ) . getTime ( ) ) ; assert ( result === true ) ; } ) ; it ( 'returns false if the given date is `Invalid Date`' , ( ) => { const result = isWeekend ( new Date ( NaN ) ) ; assert ( result === false ) ; } ) ; it ( 'throws TypeError exception if passed less than 1 argument' , ( ) => { assert . throws ( isWeekend . bind ( null ) , TypeError ) ; } ) ; } ) ;