LibTest/convert/ByteConversionSink/ByteConversionSink.withCallback_A01_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 ChunkedConversionSink.withCallback(
///  void callback(List<T> accumulated)
///  )
/// @description Checks that this constructor creates ByteConversionSink
/// @author sgrekhov@unipro.ru

import "dart:convert";
import "../../../Utils/expect.dart";

main() {
  bool called = false;

  var outSink = new ByteConversionSink.withCallback((accumulated) {
    called = true;
    Expect.listEquals(utf8.encode("Кириллица прекрасна"), accumulated);
  });

  StringConversionSink inSink = utf8.encoder.startChunkedConversion(outSink);

  Expect.isFalse(called);
  inSink.add("Кириллица");
  inSink.add(" прекрасна");
  inSink.close();
  Expect.isTrue(called);
}