Language/Classes/Abstract_Instance_Members/invocation_t04.dart

// Copyright (c) 2011, 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 Invoking an abstract method, getter or setter results in an
 * invocation of noSuchMethod exactly as if the declaration did not exist,
 * unless a suitable member a is available in a superclass, in which case a is
 * invoked.
 * @description Checks that invoking an abstract method that is inherited from
 * non-direct superclass results in invoking noSuchMethod method.
 *
 * @author hlodvig, sgrekhov@unipro.ru
 */
import "../../../Utils/expect.dart";

abstract class A {
  int m1();
  int noSuchMethod(Invocation invocation) {
    return 666;
  }
}

abstract class A1 extends A {}
abstract class A2 extends A1 {}
class C extends A2 {
}

main() {
  try {
    int v = new C().m1();
    Expect.equals(666, v);
  } on NoSuchMethodError catch (ex) {
    Expect.fail("NoSuchMethodError is not expected.");
  }
}