|  | // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file | 
|  | // for details. All rights reserved. Use of this source code is governed by a | 
|  | // BSD-style license that can be found in the LICENSE file. | 
|  |  | 
|  | import "package:expect/expect.dart"; | 
|  |  | 
|  | abstract class Mixin1 { | 
|  | var mixin1Field = 1; | 
|  | } | 
|  |  | 
|  | abstract class Mixin2 { | 
|  | var mixin2Field = 2; | 
|  | } | 
|  |  | 
|  | class A { | 
|  | var superField; | 
|  | A() : superField = 3; | 
|  | } | 
|  |  | 
|  | class B extends A with Mixin1, Mixin2 { | 
|  | var field = 4; | 
|  | } | 
|  |  | 
|  | main() { | 
|  | var b = new B(); | 
|  | Expect.equals(1, b.mixin1Field); | 
|  | Expect.equals(2, b.mixin2Field); | 
|  | Expect.equals(3, b.superField); | 
|  | Expect.equals(4, b.field); | 
|  | } |