@variantjs/core/src/__tests__/dates/isSameDay.test.ts

VariantJS common functions and utilities

import isSameDay from '../../dates/isSameDay';

describe('isSameDay', () => {
  it('determines that is same day for the same date', () => {
    const date1 = new Date(2020, 0, 15);
    const date2 = new Date(2020, 0, 15);

    expect(isSameDay(date1, date2)).toBe(true);
  });

  it('determines that is same day for the same date with dates before 1970', () => {
    const date1 = new Date('0010-02-18T12:00:00.000Z');
    const date2 = new Date('0010-02-18T08:12:13.000Z');

    expect(isSameDay(date1, date2)).toBe(true);
  });

  it('determines that is same day if different minute', () => {
    const date1 = new Date(2020, 0, 15, 12);
    const date2 = new Date(2020, 0, 15, 11);

    expect(isSameDay(date1, date2)).toBe(true);
  });

  it('determines that a date is not the same if different month', () => {
    const date1 = new Date(2020, 0, 15);
    const date2 = new Date(2020, 1, 15);

    expect(isSameDay(date1, date2)).toBe(false);
  });

  it('determines that a date is not in the same day if year is different', () => {
    const date1 = new Date(2021, 0, 15);
    const date2 = new Date(2020, 0, 15);

    expect(isSameDay(date1, date2)).toBe(false);
  });

  it('determines that a date is not in the same day if second one is undefined', () => {
    const date1 = new Date(2021, 0, 15);
    const date2 = undefined;

    expect(isSameDay(date1, date2)).toBe(false);
  });

  it('determines that a date is not in the same day if first one is undefined', () => {
    const date1 = undefined;
    const date2 = new Date(2021, 0, 15);

    expect(isSameDay(date1, date2)).toBe(false);
  });

  it('determines that a date is not in the same day if both undefined', () => {
    const date1 = undefined;
    const date2 = undefined;

    expect(isSameDay(date1, date2)).toBe(false);
  });
});