feat(sortable): log error if jquery was not available to angular on load

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "angular-ui-sortable",
-  "version": "0.12.4",
+  "version": "0.12.5",
   "description": "This directive allows you to jQueryUI Sortable.",
   "author": "https://github.com/angular-ui/ui-sortable/graphs/contributors",
   "license": "MIT",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "angular-ui-sortable",
-  "version": "0.12.4",
+  "version": "0.12.5",
   "description": "This directive allows you to jQueryUI Sortable.",
   "author": "https://github.com/angular-ui/ui-sortable/graphs/contributors",
   "license": "MIT",

src/sortable.js

@@ -35,6 +35,11 @@ angular.module('ui.sortable', [])
 
           angular.extend(opts, uiSortableConfig);
 
+          if (!angular.element.fn || !angular.element.fn.jquery) {
+            $log.error('ui.sortable: jQuery should be included before AngularJS!');
+            return;
+          }
+
           if (ngModel) {
 
             // When we add or remove elements, we need the sortable to 'refresh'

test/sortable.spec.js

@@ -36,6 +36,29 @@ describe('uiSortable', function() {
       });
     });
 
+    it('should log an error about jQuery dependency', function() {
+      inject(function($compile, $rootScope, $log) {
+        var oldAngularElementFn = angular.element.fn;
+        var mockJQliteFn = $({}, angular.element.fn, true);
+        mockJQliteFn.jquery = null;
+        angular.element.fn = mockJQliteFn;
+
+        this.after(function () {
+          angular.element.fn = oldAngularElementFn;
+        });
+
+        var element;
+        element = $compile('<ul ui-sortable><li ng-repeat="item in items" id="s-{{$index}}">{{ item }}</li></ul>')($rootScope);
+        $rootScope.$apply(function() {
+          $rootScope.items = ['One', 'Two', 'Three'];
+        });
+
+        expect($log.error.logs.length).toEqual(1);
+        expect($log.error.logs[0].length).toEqual(1);
+        expect($log.error.logs[0][0]).toEqual('ui.sortable: jQuery should be included before AngularJS!');
+      });
+    });
+
     it('should refresh sortable properly after an apply', function() {
       inject(function($compile, $rootScope, $timeout) {
         var element;