fix(copy) Collections are now copied/cloned properly

Collection elementTransformers didn't get triggered earlier, as restangularizeElem was used for both elements and collections. Now restangularizeCollection is used when copying collections.

Author: bostrom

src/restangular.js

@@ -996,10 +996,31 @@
           elem[config.restangularFields.doGETLIST] = elem[config.restangularFields.customGETLIST];
         }
 
-        function copyRestangularizedElement(fromElement, toElement) {
-          var copiedElement = angular.copy(fromElement, toElement);
-          return restangularizeElem(fromElement[config.restangularFields.parentResource],
-            copiedElement, fromElement[config.restangularFields.route], fromElement[config.restangularFields.fromServer]);
+        function copyRestangularizedElement(element) {
+          var copiedElement = angular.copy(element);
+
+          // check if we're dealing with a collection (i.e. an array)
+          // and restangularize the element using the proper restangularizer,
+          // element / collection
+          if (_.isArray(element)) {
+            return restangularizeCollection(
+              element[config.restangularFields.parentResource],
+              copiedElement,
+              element[config.restangularFields.route],
+              element[config.restangularFields.fromServer],
+              element[config.restangularFields.reqParams]
+            );
+          }
+
+          // not a collection, restangularize it as an element
+          return restangularizeElem(
+            element[config.restangularFields.parentResource],
+            copiedElement,
+            element[config.restangularFields.route],
+            element[config.restangularFields.fromServer],
+            element[config.restangularFields.restangularCollection],
+            element[config.restangularFields.reqParams]
+          );
         }
 
         function restangularizeElem(parent, element, route, fromServer, collection, reqParams) {

test/restangularSpec.js

@@ -1105,6 +1105,24 @@ describe('Restangular', function() {
       $httpBackend.flush();
     });
 
+    it('should work with cloned collections', function () {
+      var responseHandler = jasmine.createSpy();
+
+      Restangular.addElementTransformer(/^accounts/, true, function(collection) {
+        collection.customThing = 'customValue';
+        return collection;
+      });
+
+      Restangular.all('accounts').getList().then(responseHandler);
+      $httpBackend.flush();
+
+      var accounts = responseHandler.calls[0].args[0];
+      var accountsCopy = accounts.clone();
+
+      expect(accounts.customThing).toEqual('customValue');
+      expect(accountsCopy.customThing).toEqual('customValue');
+    });
+
     it('should allow for a custom method to be placed at the model level using regexp route when one model is requested', function() {
       var accountPromise;