// 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 It is an error to call a method, setter, getter or operator on
/// an expression whose type is potentially nullable and not dynamic, except for
/// the methods, setters, getters, and operators on Object.
///
/// @description Check that it is no compile-time error to call a method, setter,
/// getter or operator on an expression whose type is potentially nullable if
/// they are  methods, setters, getters, and operators on Object. Test type
/// aliases
/// @author sgrekhov@unipro.ru

// Requirements=nnbd-strong
import '../../Utils/expect.dart';

class A {
}

typedef AAlias = A?;

main() {
  AAlias x = A();
  Expect.isNotNull(x.hashCode);
  Expect.isNotNull(x.toString());
  Expect.isNotNull(x.runtimeType);
  Expect.isFalse(x == A());
}