LanguageFeatures/Extension-methods/tearoffs_t02.dart

// 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 Torn off extension methods are never equal unless they are
/// identical.
///
/// @description Check that a static extension method can be torn off like an
/// instance method.
/// @author sgrekhov@unipro.ru


import "../../Utils/expect.dart";

extension ExtendedList on List {
  int foo(Object x) => x.toString().length;
}

main() {
  List list = [1, 2, 3];
  int Function(int) func1 = list.foo;
  int Function(int) func2 = list.foo;

  Expect.isFalse(func1 == func2);
  Expect.isTrue(func1 == func1);
}