LibTest/async/Zone/bindBinaryCallback_A01_t02.dart

// 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 ZoneBinaryCallback<R, T1, T2> bindBinaryCallback<R, T1, T2>(
///            R callback(T1 argument1, T2 argument2)
/// )
/// Registers the provided callback and returns a function that will execute
/// in this zone.
/// Equivalent to:
///    ZoneCallback registered = registerBinaryCallback(callback);
///    return (arg1, arg2) => thin.runBinary(registered, arg1, arg2);
/// @description Checks that synchronous [callback] errors are not caught in zone
/// @author ilya
/// @author a.semenov@unipro.ru


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

main() {
  int handlerCallCount = 0;

  void handler(Zone self, ZoneDelegate parent, Zone zone, e, st) {
    handlerCallCount++;
  }

  Zone zone = Zone.current.fork(
      specification: new ZoneSpecification(
        handleUncaughtError: handler
      )
  );

  int callback(int x, int y) {
    throw "callback error";
  }

  ZoneBinaryCallback<int,int,int> boundCallback =
                              zone.bindBinaryCallback<int,int,int>(callback);
  Expect.throws(() => boundCallback(1,2), (e) => e=="callback error");
  Expect.equals(0, handlerCallCount);
}