// Copyright (c) 2011, 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.

// @dart = 2.9

/// @assertion void Function(T) bindUnaryCallbackGuarded<T>(
///                                  void callback(T argument)
///                               )
///    Registers the provided callback and returns a function that will execute
/// in this zone.
///    When the function executes, errors are caught and treated as uncaught
/// errors.
///    Equivalent to:
/// ZoneCallback registered = this.registerUnaryCallback(callback);
/// return (arg) => this.runUnaryGuarded(registered, arg);
/// @description Checks that [callback] is run in the zone it was bound to.
/// @author a.semenov@unipro.ru


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

main() {
  Zone zone = Zone.current;
  Zone callbackZone = null;

  void callback(int x) {
    callbackZone = Zone.current;
  }

  void Function(int) boundCallback =
                                  zone.bindUnaryCallbackGuarded<int>(callback);

  runZoned(() {
    boundCallback(3);
  });
  Expect.equals(zone, callbackZone);
}