const expect = require('expect'); const {isSameDate} = require('./_30s.js'); test('isSameDate is a Function', () => { expect(isSameDate).toBeInstanceOf(Function); }); test('isSameDate produces the correct result', () => { expect(isSameDate(new Date(2010, 10, 20), new Date(2010, 10, 20))).toBeTruthy(); }); test('isSameDate produces the correct result', () => { expect(isSameDate(new Date(2010, 10, 20), new Date(2010, 10, 21))).toBeFalsy(); });