import { MultTablePipe } from './mult-table.pipe' ; describe ( 'MultTablePipe' , ( ) => { let pipe ; beforeEach ( ( ) => { pipe = new MultTablePipe ( ) ; } ) ; it ( 'should return an empty array if the value of digit is not valid' , ( ) => { const digit = 0 ; const limit = 10 ; const outputArray = pipe . transform ( null , digit , limit ) ; expect ( outputArray ) . toEqual ( [ ] ) ; } ) ; it ( 'should return an empty array if the value of limit is not valid' , ( ) => { const digit = 10 ; const limit = 0 ; const outputArray = pipe . transform ( null , digit , limit ) ; expect ( outputArray ) . toEqual ( [ ] ) ; } ) ; it ( 'should return the correct multiplication table when both digit and limit inputs are valid' , ( ) => { const digit = 10 ; const limit = 2 ; const expectedArray = [ '10 * 1 = 10' , '10 * 2 = 20' ] ; const outputArray = pipe . transform ( null , digit , limit ) ; expect ( outputArray ) . toEqual ( expectedArray ) ; } ) ; it ( 'should round of the limit if it is provided in decimals' , ( ) => { const digit = 10 ; const limit = 3.5 ; const expectedArray = [ '10 * 1 = 10' , '10 * 2 = 20' , '10 * 3 = 30' ] ; const outputArray = pipe . transform ( null , digit , limit ) ; expect ( outputArray ) . toEqual ( expectedArray ) ; } ) ; } ) ;