LibTest/io/IOSink/add_A04_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.

/// @assertion void add(List<int> data)
/// ...
/// The data list should not be modified after it has been passed to add.
/// @description Checks that the data list should not be modified after it has
/// been passed to add.
/// @author sgrekhov@unipro.ru

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

int callCounter = 0;

class MyStreamConsumer extends StreamConsumer<List<int>> {

  Future addStream(Stream<List<int>> stream) {
    stream.toList().then((x) {
      callCounter++;
      Expect.listEquals([[0, 1, 4, 1, 5, 9]], x);
      asyncEnd();
    });
    return new Future(() {});
  }

  Future close() { return new Future(() {}); }
}

test() async {
  List<int> data = [3, 1, 4, 1, 5];
  StreamConsumer<List<int>> consumer = new MyStreamConsumer();
  IOSink sink = new IOSink(consumer);
  sink.add(data);
  data.add(9);
  data[0] = 0;
  await sink.close();
  Expect.equals(1, callCounter);
}

main() {
  asyncStart();
  test();
}