// 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 In a migrated library, override checking must check that an
/// override is consistent with all overridden methods from other migrated
/// libraries in the super-interface chain, since a legacy library is permitted
/// to override otherwise incompatible signatures for a method.
///
/// @description Check that if opted-in class implements two classes with some
/// method (one is legacy), migrated method with non-required nullable parameter
/// cannot override legacy method with named parameter with default value.
///
/// @Issue #41527
/// @author iarkh@unipro.ru

// Requirements=nnbd-weak
import "override_checking_A02_opted_out_lib.dart";
import "../../../../Utils/expect.dart";

abstract class B {
  void test_default({required int? i})    {}
  void test_nondefault({int? i}) {}
}

class A1 implements B, LEGACY_REQUIRED_ARGS {
  void test_default({required int? i}) {}
  void test_nondefault({int? i}) { Expect.equals(1, i); }
}

class A2 implements B, LEGACY_REQUIRED_ARGS {
  void test_default({required int? i}) {}
  void test_nondefault({int? i}) { Expect.isNull(i);}
}

main() {
  A1().test_nondefault(i: 1);
  A2().test_nondefault();
}