fix(modal): fix bindToController

- Fixes issue where `$scope` provided does not have properties present
  on controller instance due to $new resulting in the property on the
prototype of the $scope copied from, which causes it to not be
enumerable

Closes #5048
Fixes #5039

Author: wesleycho

src/modal/modal.js

@@ -616,8 +616,9 @@ angular.module('ui.bootstrap.modal', ['ui.bootstrap.stackedMap'])
             samePromise = promiseChain = $q.all([promiseChain])
               .then(resolveWithTemplate, resolveWithTemplate)
               .then(function resolveSuccess(tplAndVars) {
+                var providedScope = modalOptions.scope || $rootScope;
 
-                var modalScope = (modalOptions.scope || $rootScope).$new();
+                var modalScope = providedScope.$new();
                 modalScope.$close = modalInstance.close;
                 modalScope.$dismiss = modalInstance.dismiss;
 
@@ -641,7 +642,9 @@ angular.module('ui.bootstrap.modal', ['ui.bootstrap.stackedMap'])
                   ctrlInstance = $controller(modalOptions.controller, ctrlLocals);
                   if (modalOptions.controllerAs) {
                     if (modalOptions.bindToController) {
-                      angular.extend(ctrlInstance, modalScope);
+                      ctrlInstance.$close = modalScope.$close;
+                      ctrlInstance.$dismiss = modalScope.$dismiss;
+                      angular.extend(ctrlInstance, providedScope);
                     }
 
                     modalScope[modalOptions.controllerAs] = ctrlInstance;

src/modal/test/modal.spec.js

@@ -663,11 +663,21 @@ describe('$uibModal', function () {
       });
 
       it('should allow usage of bindToController', function() {
-        open({template: '<div>{{test.fromCtrl}} {{test.isModalInstance}}</div>', controller: function($uibModalInstance) {
-          this.fromCtrl = 'Content from ctrl';
-          this.isModalInstance = angular.isObject($uibModalInstance) && angular.isFunction($uibModalInstance.close);
-        }, controllerAs: 'test', bindToController: true});
-        expect($document).toHaveModalOpenWithContent('Content from ctrl true', 'div');
+        var $scope = $rootScope.$new(true);
+        $scope.foo = 'bar';
+        open({
+          template: '<div>{{test.fromCtrl}} {{test.closeDismissPresent()}} {{test.foo}}</div>',
+          controller: function($uibModalInstance) {
+            this.fromCtrl = 'Content from ctrl';
+            this.closeDismissPresent = function() {
+              return angular.isFunction(this.$close) && angular.isFunction(this.$dismiss);
+            };
+          },
+          controllerAs: 'test',
+          bindToController: true,
+          scope: $scope
+        });
+        expect($document).toHaveModalOpenWithContent('Content from ctrl true bar', 'div');
       });
     });