| // 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 (the first class is legacy and method in the second has argument of |
| /// nullable type), opted-in method argument can be of nullable type and the |
| /// method can accept null argument of [FutureOr]. |
| /// |
| /// @author iarkh@unipro.ru |
| |
| // Requirements=nnbd-weak |
| import "dart:async"; |
| import "../../../../Utils/expect.dart"; |
| import "override_checking_A02_opted_out_lib.dart"; |
| |
| abstract class B { |
| void test_futureOr(FutureOr i); |
| } |
| |
| class A implements B, LEGACY_ARGS { |
| |
| void test_futureOr(FutureOr? i) { Expect.isNull(i); } |
| |
| void test_int(int? i) {} |
| void test_object(Object? i) {} |
| void test_dynamic(dynamic i) {} |
| void test_function(Function? i) {} |
| void test_null(Null i) {} |
| } |
| |
| main() { |
| A a = A(); |
| a.test_futureOr(null); |
| } |