LibTest/convert/ClosableStringSink/write_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.

/// @assertion void write(Object obj)
/// Converts obj to a String by invoking Object.toString and adds the result to
/// this.
/// @description Checks that this method converts obj to a String by invoking
/// Object.toString and adds the result to this.
/// @author sgrekhov@unipro.ru

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

class C {
  String value;

  C(this.value);

  String toString() => "C:" + this.value;
}

main() {
  StringBuffer stringSink = new StringBuffer();

  ClosableStringSink sink =
      new ClosableStringSink.fromStringSink(stringSink, () {});
  sink.write(new C("123"));
  sink.close();
  Expect.equals("C:123", stringSink.toString());
}