Language/07_Classes/4_Abstract_Instance_Members_A02_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, getter or setter that is 
 *  inherited from non-direct superclass results in invoking noSuchMethod method.
 * @static-warning
 * @author hlodvig
 */
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 { /// static type warning Concrete class has unimplemented member
}

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