text: import '~/lib/utils/datetime_utility';
  
  (() => {
    describe('Date time utils', () => {
      describe('get day name', () => {
        it('should return Sunday', () => {
          const day = gl.utils.getDayName(new Date('07/17/2016'));
          expect(day).toBe('Sunday');
        });
  
        it('should return Monday', () => {
          const day = gl.utils.getDayName(new Date('07/18/2016'));
          expect(day).toBe('Monday');
        });
  
        it('should return Tuesday', () => {
          const day = gl.utils.getDayName(new Date('07/19/2016'));
          expect(day).toBe('Tuesday');
        });
  
        it('should return Wednesday', () => {
          const day = gl.utils.getDayName(new Date('07/20/2016'));
          expect(day).toBe('Wednesday');
        });
  
        it('should return Thursday', () => {
          const day = gl.utils.getDayName(new Date('07/21/2016'));
          expect(day).toBe('Thursday');
        });
  
        it('should return Friday', () => {
          const day = gl.utils.getDayName(new Date('07/22/2016'));
          expect(day).toBe('Friday');
        });
  
        it('should return Saturday', () => {
          const day = gl.utils.getDayName(new Date('07/23/2016'));
          expect(day).toBe('Saturday');
        });
      });
  
      describe('get day difference', () => {
        it('should return 7', () => {
          const firstDay = new Date('07/01/2016');
          const secondDay = new Date('07/08/2016');
          const difference = gl.utils.getDayDifference(firstDay, secondDay);
          expect(difference).toBe(7);
        });
  
        it('should return 31', () => {
          const firstDay = new Date('07/01/2016');
          const secondDay = new Date('08/01/2016');
          const difference = gl.utils.getDayDifference(firstDay, secondDay);
          expect(difference).toBe(31);
        });
  
        it('should return 365', () => {
          const firstDay = new Date('07/02/2015');
          const secondDay = new Date('07/01/2016');
          const difference = gl.utils.getDayDifference(firstDay, secondDay);
          expect(difference).toBe(365);
        });
      });
    });
  })();
  