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// 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 abstract Future addStream(Stream<S> stream)
/// Consumes the elements of stream.
/// Listens on stream and does something for each event.
/// The consumer may stop listening after an error, or it may consume all the
/// errors and only stop at a done event.
/// @description Checks that addStream() can not be followed by add(),
/// addError() or close() while the future is not completed.
/// @author ilya
import "dart:async";
import "../../../Utils/expect.dart";
main() {
var from = new Stream.fromIterable([5,6]);
var c = new StreamController();
var sink = c.sink;
sink.addStream(from).then((_) {
Expect.throws(() => sink.add(1));
Expect.throws(() => sink.addError(2));
Expect.throws(() => sink.close());