3. describe('MakeMomentJSGreatAgain', function() {
    4.   it('handles 30-day months', function() {
    5.     let date = new MakeMomentJSGreatAgain('1/1/2015');
    6.     date.shouldEqual('1/31/2015');
    9.   it('handles leap year', function() {
    10.     let date = new MakeMomentJSGreatAgain('2/1/2016');
    11.     date.addDays(28);
    12.   });
    14.   it('handles non-leap year', function() {
    15.     let date = new MakeMomentJSGreatAgain('2/1/2015');
    16.     date.addDays(28);
    17.     assert.equal('03/01/2015', date);
    18. });