// __tests__/helpers.test.js const { format_date, format_plural } = require('../utils/helpers'); test('format_date() returns a date string', () => { const date = new Date('2020-03-20 16:12:03'); expect(format_date(date)).toBe('3/20/2020'); }); ======================== // /utils/helpers.js module.exports = { format_date: (date) => { return `${new Date(date).getMonth() + 1}/${new Date(date).getDate()}/${new Date(date).getFullYear()}`; }, };