Language/Mixins/Mixin_Application/initializers_t04.dart

// Copyright (c) 2019, 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.

/// @assertion If any of the instance fields of M (respectively, Mk) have
/// initializers, they are executed in the scope of M (respectively, Mk) to
/// initialize the corresponding fields of C.
/// @description Checks that if mixins have initializers then they are executed
/// and initialize corresponding fields of the class. Test type aliases
/// @author sgrekhov@unipro.ru

import "../../../Utils/expect.dart";

class A {
  int _xa = 0;
  int get x => _xa;
}

class M1 {
  int _xm1 = 1;
  int get x => _xm1;
}

class M2 {
  int _xm2 = 2;
  int get x => _xm2;
}

typedef AAlias = A;
typedef M1Alias = M1;
typedef M2Alias = M2;

class B1 = AAlias with M1Alias;
class B2 = AAlias with M1Alias, M2Alias;
class B3 = B1 with M2Alias;

main() {
  B1 b1 = new B1();
  B2 b2 = new B2();
  B3 b3 = new B3();

  Expect.equals(1, b1.x);
  Expect.equals(2, b2.x);
  Expect.equals(2, b3.x);
}