it('should support Date object as minDate', function() {
        var elm = compileDirective('options-minDate-date');
        angular.element(elm[0]).triggerHandler('focus');
        expect(sandboxEl.find('.dropdown-menu tbody button:contains(19)').is(':disabled')).toBeTruthy();
        expect(sandboxEl.find('.dropdown-menu tbody button:contains(20)').is(':disabled')).toBeFalsy();