LibTest/io/Stdout/add_A03_t01.dart

// Copyright (c) 2017, 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 add(List<int> data)
/// This function must not be called when a stream is currently being added using
/// [addStream].
/// @description Checks that calling the [add] when a stream is being added
/// causes error.
/// @author iarkh@unipro.ru

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

test(Stdout sink) {
  Stream<List> aStream = new Stream<List<int>>.fromIterable([[1, 2, 3, 4, 5]]);

  sink.addStream(aStream).then((x) {
    new Future.delayed(new Duration(seconds: 3));
  });

  Expect.throws(() { sink.add([1, 2, 3, 4, 5]); }, (e) => e is StateError);
}

main() {
  test(stdout);
  test(stderr);
}