// 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  All opted-in libraries upstream from the legacy library are
/// viewed by the legacy library with nullability related features erased from
/// their APIs. In particular:
///  - All types of the form T? in the opted-in API are treated as T.
///  - All required named parameters are treated as optional named parameters.
///  - The type Never is treated as the type Null
///
/// @description Check that all types of the form T? in the opted-in API are
/// treated as T
/// @author sgrekhov@unipro.ru

// @dart=2.6
// Requirements=nnbd-weak
import '../../../Utils/expect.dart';
import 'type-aliases/opted_in_aliases_lib.dart';

main() {
  AAliasNonNullable a1 = null;
  AAliasNullable a2 = null;
  StringAliasNonNullable s1 = null;
  StringAliasNullable s2 = null;
  IntAliasNonNullable i1 = null;
  IntAliasNullable i2 = null;

  a1 = new A();
  a2 = new A();
  s1 = "Lily was here";
  s2 = "Show must go on";
  i1 = 42;
  i2 = 13;

  Expect.isTrue(a1 is A);
  Expect.isTrue(s1 is String);
  Expect.isTrue(i1 is int);
  Expect.isTrue(a2 is A);
  Expect.isTrue(s2 is String);
  Expect.isTrue(i2 is int);
}