LibTest/convert/JsonCodec/encode_A03_t01.dart

// Copyright (c) 2013, 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 Object encode(Object value, {toEncodable(object)})
/// If a List or Map contains a reference to itself, directly or through other
/// lists or maps, it cannot be serialized and a JsonCyclicError is thrown.
/// @description Checks that if a List or Map contains a reference to itself
/// directly or through other lists or maps,
/// it cannot be serialized and a JsonCyclicError is thrown.
/// @note undocumented
/// @author kaigorodov

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

List cyclist1() {
  List<Object> res = [1, 2, 3];
  res.add(res);
  return res;
}

List cyclist2() {
  List<Object> res = [1, 2, 3];
  List<Object> intlist = [4, 5, 6];
  intlist.add(res);
  res.add(intlist);
  return res;
}

Map cycmap0() {
  Map<String, Object> res = {};
  res["kkk"] = res;
  return res;
}

Map cycmap1() {
  Map<String, Object> res = {"1": 1, "2": 2, "3": 3};
  res["100"] = res;
  return res;
}

Map cycmap2() {
  Map<String, Object> res = {"1": 1, "2": 2, "3": 3};
  Map<String, Object> intlist = {"4": 4, "5": 5, "6": 6};
  intlist["54"] = res;
  res["22"] = intlist;
  return res;
}

List<Object> table = [
  cyclist1(),
  cyclist2(),
  cycmap0(),
  cycmap1(),
  cycmap2(),
];

main() {
  bool failed = false;
  JsonCodec codec = new JsonCodec();
  for (Object obj in table) {
    try {
      String res = codec.encode(obj);
      failed = true;
    } on JsonCyclicError catch(e) {
    }
    if (failed) {
      Expect.fail("");
    }
  }
}