it('throw errors', () => {
// $ExpectError
const str: string = bizniz.weekDaysBetween('', 1);
const nr: number = bizniz.addWeekDays(new Date(0), 1);
});
it('#weekDaysBetween', () => {
const num: number = bizniz.weekDaysBetween(new Date(0), new Date(0))
});