it('should support Date object as maxDate', function() {
        var elm = compileDirective('options-maxDate-date');
        angular.element(elm[0]).triggerHandler('focus');
        expect(sandboxEl.find('.dropdown-menu tbody button:contains(24)').is(':disabled')).toBeFalsy();
        expect(sandboxEl.find('.dropdown-menu tbody button:contains(25)').is(':disabled')).toBeTruthy();