import {isValidDate} from './is-valid-date'; describe('isValidDate()', (): void => { let date: Date; describe('when the given date is an invalid date', (): void => { beforeEach((): void => { date = new Date('16-04-1994'); }); it('should return false', (): void => { expect.assertions(1); const result = isValidDate(date); expect(result).toStrictEqual(false); }); }); describe('when the given date is a new date', (): void => { beforeEach((): void => { date = new Date(); }); it('should return true', (): void => { expect.assertions(1); const result = isValidDate(date); expect(result).toStrictEqual(true); }); }); describe('when the given date is an ISO and valid date', (): void => { beforeEach((): void => { date = new Date('2011-04-22T13:33:48Z'); }); it('should return true', (): void => { expect.assertions(1); const result = isValidDate(date); expect(result).toStrictEqual(true); }); }); describe('when the given date is an ISO with ms and valid date', (): void => { beforeEach((): void => { date = new Date('2011-10-05T14:48:00.000Z'); }); it('should return true', (): void => { expect.assertions(1); const result = isValidDate(date); expect(result).toStrictEqual(true); }); }); });