blob: e3b59b2784054c356036075655d643086ab45dcf [file] [log] [blame]
// 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 Future then(dynamic onValue(T value), {Function onError})
/// If onError is provided, and this future completes with an error, the onError
/// callback is called with that error and its stack trace. The onError callback
/// must accept either one argument or two arguments. If onError accepts two
/// arguments, it is called with both the error and the stack trace, otherwise
/// it is called with just the error object.
/// @description Checks that onError callback with more than two parameters
/// causes runtime exception.
/// @author ilya
import "dart:async";
import "../../../Utils/expect.dart";
f() {
Completer completer = new Completer();
Future future = completer.future;
future.then((x) {}, onError: (x, y, z) {});
main() {
runZoned(f, onError: (e) {