import { RenderResult } from '@testing-library/react-hooks' ; import { addMonths } from 'date-fns' ; import { customRenderHook } from 'test/render' ; import { ActiveModifiers } from 'types/Modifiers' ; import { useActiveModifiers } from './useActiveModifiers' ; const date = new Date ( 2010 , 5 , 23 ) ; let renderResult ; function setup ( day , displayMonth ? ) { const hookResult = customRenderHook ( ( ) => useActiveModifiers ( day , displayMonth ) ) ; renderResult = hookResult . result ; } describe ( 'when in the same month' , ( ) => { const displayMonth = date ; beforeEach ( ( ) => { setup ( date , displayMonth ) ; } ) ; test ( 'should return the active modifiers' , ( ) => { expect ( renderResult . current ) . toBeDefined ( ) ; } ) ; } ) ; describe ( 'when not in the same display month' , ( ) => { const displayMonth = addMonths ( date , 1 ) ; beforeEach ( ( ) => { setup ( date , displayMonth ) ; } ) ; test ( 'should return the outside modifier' , ( ) => { expect ( renderResult . current . outside ) . toBe ( true ) ; } ) ; } ) ;