LibTest/io/IOSink/writeAll_A02_t04.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 writeAll(Iterable objects, [String separator = ""])
/// If [separator] is provided, a [write] with the [separator] is performed
/// between any two elements of objects.
/// @description Check that [writeAll] causes [Error] if [separator] is set to
/// [null].
/// @author iarkh@unipro.ru

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

class MyStreamConsumer extends StreamConsumer<List<int>> {
  Future addStream(Stream<List> stream) { return new Future(() {}); }
  Future close() { return new Future(() {}); }
}

main() {
  StreamConsumer consumer = new MyStreamConsumer();
  IOSink sink = new IOSink(consumer);
  Expect.throws(() {
    sink.writeAll([1, 2], null);
  }, (e) => e is NoSuchMethodError);
  sink.close();
}