import { compareDay, compareMonth, getNextDay } from '../utils';

const date1 = new Date(2010, 0, 1);
const date2 = new Date(2010, 0, 2);
const date3 = new Date(2010, 1, 1);
const date4 = new Date(2011, 0, 1);

test('compareMonth', () => {
  expect(compareMonth(date1, date1)).toEqual(0);
  expect(compareMonth(date1, date2)).toEqual(0);
  expect(compareMonth(date2, date3)).toEqual(-1);
  expect(compareMonth(date1, date4)).toEqual(-1);
  expect(compareMonth(date4, date1)).toEqual(1);
});

test('compareDay', () => {
  expect(compareDay(date1, date1)).toEqual(0);
  expect(compareDay(date1, date2)).toEqual(-1);
  expect(compareDay(date2, date3)).toEqual(-1);
  expect(compareDay(date4, date1)).toEqual(1);
});

test('getNextDay', () => {
  expect(getNextDay(date1).getDate()).toEqual(2);
  expect(getNextDay(date2).getDate()).toEqual(3);
});