LibTest/async/Future/then_A05_t01.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.
 */
/**
 * @assertion abstract Future then(onValue(T value), {onError(Object asyncError)})
 * The onError callback must be of type
 * void onError(error) or
 * void onError(error, StackTrace stackTrace).
 * If onError accepts two arguments it is called with the stack trace
 * (which could be null if the stream itself received an error without 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/async_utils.dart";

f() {
  Completer completer = new Completer();
  Future future = completer.future;
  
  future.then((x){}, onError: (x,y,z) {});

  completer.completeError(1);
}

main() {
  asyncStart();
  runZoned(f, onError: (e) {
    asyncEnd();
  });
}