| // 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 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 method can accept non-null argument if corresponding |
| /// parent method argument is of non-nullable type. |
| /// |
| /// @author iarkh@unipro.ru |
| |
| // Requirements=nnbd-weak |
| // @dart=2.6 |
| |
| import "dart:async"; |
| import "../../../../Utils/expect.dart"; |
| import "override_checking_A01_opted_in_lib.dart"; |
| |
| class B { |
| void test_int(int i) { Expect.equals(1, i); } |
| void test_object(Object o) { Expect.equals(1, o); } |
| void test_function(Function f) { Expect.equals(testme, f); } |
| void test_futureOr(FutureOr<int> i) { Expect.equals(1, i); } |
| } |
| |
| class A extends B implements OPTED_NONNULLABLE_ARGS {} |
| |
| void testme() {} |
| |
| main() { |
| A a = A(); |
| a.test_int(1); |
| a.test_object(1); |
| a.test_function(testme); |
| a.test_futureOr(1); |
| } |