/*
 * Copyright (c) 2020, 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 In an unmigrated library, override checking is done using legacy
 * types. This means that an unmigrated library can bring together otherwise
 * incompatible methods. When choosing the most specific signature during
 * interface computation, all nullability and requiredness annotations are
 * ignored, and the [Never] type is treated as [Null].
 *
 * @description Check that if legacy class extends legacy class and implements
 * opted-in class, legacy getter can return [null] if corresponding parent
 * getter is of nullable type.
 *
 * @author iarkh@unipro.ru
 */
// SharedOptions=--enable-experiment=non-nullable
// @dart=2.6

import "dart:async";
import "../../Utils/expect.dart";
import "override_checking_A01_opted_in_lib.dart";

class A extends B implements OPTED_NULLABLE_GETTER {}

class B {
  int      get getInt      => null;
  Object   get getObject   => null;
  Function get getFunction => null;
  FutureOr get getFutureOr => null;
  dynamic  get getDynamic  => null;
  Null     get getNull     => null;
}

main() {
  A a = A();
  Expect.isNull(a.getInt);
  Expect.isNull(a.getObject);
  Expect.isNull(a.getFunction);
  Expect.isNull(a.getFutureOr);
  Expect.isNull(a.getDynamic);
  Expect.isNull(a.getNull);
}