fix(datepicker): min-date/max-date: parse fix for literals

BREAKING CHANGE: only display formats or altInputFormats are valid for literal dates

Closes #3437

src/datepicker/datepicker.js

@@ -628,10 +628,10 @@ function(scope, element, attrs, $compile, $parse, $document, $rootScope, $positi
       if (attrs[key]) {
         var getAttribute = $parse(attrs[key]);
         scope.$parent.$watch(getAttribute, function(value) {
-          scope.watchData[key] = value;
           if (key === 'minDate' || key === 'maxDate') {
-            cache[key] = new Date(value);
+            cache[key] = new Date(parseDate(value));
           }
+          scope.watchData[key] = cache[key] || value;
         });
         datepickerEl.attr(cameltoDash(key), 'watchData.' + key);
 

src/datepicker/test/datepicker.spec.js

@@ -1982,6 +1982,17 @@ describe('datepicker', function() {
             expect(buttons.eq(0).prop('disabled')).toBe(true);
           });
 
+          it('should disable today button if before min date, yyyy-MM-dd case', inject(function($filter) {
+            var minDate = new Date(new Date().setDate(new Date().getDate() + 1));
+            var literalMinDate = $filter('date')(minDate, 'yyyy-MM-dd');
+            var wrapElement = $compile('<div><input ng-model="date" uib-datepicker-popup="yyyy-MM-dd" min-date="\'' + literalMinDate + '\'" is-open="true"><div>')($rootScope);
+            $rootScope.$digest();
+            assignElements(wrapElement);
+            assignButtonBar();
+
+            expect(buttons.eq(0).prop('disabled')).toBe(true);
+          }));
+
           it('should disable today button if after max date', function() {
             $rootScope.maxDate = new Date().setDate(new Date().getDate() - 2);
             var wrapElement = $compile('<div><input ng-model="date" uib-datepicker-popup max-date="maxDate" is-open="true"><div>')($rootScope);