fix(tagging multiple): hide tagging item if null returned

src/uiSelectMultipleDirective.js

@@ -320,7 +320,7 @@ uis.directive('uiSelectMultiple', ['uiSelectMinErr','$timeout', function(uiSelec
               });
               return;
             }
-            newItem.isTag = true;
+            if (newItem) newItem.isTag = true;
           // handle newItem string and stripping dupes in tagging string context
           } else {
             // find any tagging items already in the $select.items array and store them
@@ -369,7 +369,7 @@ uis.directive('uiSelectMultiple', ['uiSelectMinErr','$timeout', function(uiSelec
             items = items.slice(dupeIndex+1,items.length-1);
           } else {
             items = [];
-            items.push(newItem);
+            if (newItem) items.push(newItem);
             items = items.concat(stashArr);
           }
           scope.$evalAsync( function () {

test/select.spec.js

@@ -567,7 +567,7 @@ describe('ui-select tests', function() {
     var el = createUiSelect({tagging: 'taggingFunc'});
     clickMatch(el);
 
-    $(el).scope().$select.search = 'idontexist';
+    showChoicesForSearch(el, 'idontexist');
     $(el).scope().$select.activeIndex = 0;
     $(el).scope().$select.select('idontexist');
 
@@ -2231,6 +2231,32 @@ describe('ui-select tests', function() {
       expect(scope.slowTaggingFunc.calls.count()).not.toBe(15);
     });
 
+    it('should allow decline tags when tagging function returns null in multiple select mode', function() {
+      scope.taggingFunc = function (name) {
+        if (name == 'idontexist') return null;
+        return {
+          name: name,
+          email: name + '@email.com',
+          group: 'Foo',
+          age: 12
+        };
+      };
+
+      var el = createUiSelectMultiple({tagging: 'taggingFunc'});
+
+      showChoicesForSearch(el, 'amalie');
+      expect(el.find('.ui-select-choices-row-inner').size()).toBe(2);
+      expect(el.scope().$select.items[0]).toEqual(jasmine.objectContaining({name: 'amalie', isTag: true}));
+      expect(el.scope().$select.items[1]).toEqual(jasmine.objectContaining({name: 'Amalie'}));
+
+      showChoicesForSearch(el, 'idoexist');
+      expect(el.find('.ui-select-choices-row-inner').size()).toBe(1);
+      expect(el.find('.ui-select-choices-row-inner').is(':contains(idoexist@email.com)')).toBeTruthy();
+
+      showChoicesForSearch(el, 'idontexist');
+      expect(el.find('.ui-select-choices-row-inner').size()).toBe(0);
+    });
+
     it('should allow paste tag from clipboard', function() {
       scope.taggingFunc = function (name) {
         return {