| // 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 implements opted-in class, legacy |
| /// method with optional named argument with default non-null value can override |
| /// method with [required] argument and accept [null] values. |
| /// |
| /// @author iarkh@unipro.ru |
| |
| // Requirements=nnbd-weak |
| // @dart=2.6 |
| |
| import "../../../../Utils/expect.dart"; |
| import "override_checking_A01_opted_in_lib.dart"; |
| |
| class A implements OPTED_REQUIRED_ARGS { |
| void test_required_nonnullable({int i = 1}) { Expect.isNull(i); } |
| void test_required_nullable({int i = 1}) { Expect.isNull(i); } |
| } |
| |
| main() { |
| A a = A(); |
| a.test_required_nonnullable(i: null); |
| a.test_required_nullable(i: null); |
| } |