add $route.parent for setting parentScope

src/services.js

@@ -681,6 +681,23 @@ angularServiceInject('$route', function(location) {
          */
         onChange: bind(onChange, onChange.push),
 
+        /**
+         * @workInProgress
+         * @ngdoc method
+         * @name angular.service.$route#parent
+         * @methodOf angular.service.$route
+         *
+         * @param {Scope} [scope=rootScope] Scope to be used as parent for newly created
+         *    `$route.current.scope` scopes.
+         *
+         * @description
+         * Sets a scope to be used as the parent scope for scopes created on route change. If not
+         * set, defaults to the root scope.
+         */
+        parent: function(scope) {
+          if (scope) parentScope = scope;
+        },
+
         /**
          * @workInProgress
          * @ngdoc method

test/servicesSpec.js

@@ -503,6 +503,28 @@ describe("service", function(){
       expect($route.current.template).toBe('bar.html');
       expect(onChangeSpy.callCount).toBe(1);
     });
+
+    it('should make parentScope configurable via parent()', function() {
+      var scope = angular.scope(),
+          parentScope = scope.$new(),
+          $location = scope.$service('$location'),
+          $route = scope.$service('$route');
+
+      $route.parent(parentScope);
+      $route.when('/foo', {template: 'foo.html'});
+      $route.otherwise({template: '404.html'});
+
+      scope.$eval();
+
+      expect($route.current.template).toBe('404.html');
+      expect($route.current.scope.$parent).toBe(parentScope);
+
+      $location.updateHash('/foo');
+      scope.$eval();
+
+      expect($route.current.template).toBe('foo.html');
+      expect($route.current.scope.$parent).toBe(parentScope);
+    });
   });