// Copyright (c) 2016, 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 String iterableToFullString(Iterable iterable,
/// [String leftDelimiter = '(', String rightDelimiter = ')'])
/// Handles circular references where converting one of the elements to a string
/// ends up converting [iterable] to a string again.
/// @description Checks that IterableBase.iterableToShortString() replaces the
/// circular references with '[...]' substrings.
/// @author iarkh@unipro.ru

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

main() {
  List l1 = [1];
  List l2 = [2];

  l1.add(l2);
  Expect.equals("(1, [2])", IterableBase.iterableToShortString(l1));

  l1.add(l1);
  Expect.equals("(1, [2], [...])",
      IterableBase.iterableToShortString(l1));

  l1.add(l1);
  Expect.equals("(1, [2], [...], [...])",
      IterableBase.iterableToShortString(l1));

  l2.add(l1);
  Expect.equals("(1, [2, [...]], [...], [...])",
      IterableBase.iterableToShortString(l1));

  l2.add(l2);
  Expect.equals("(1, [2, [...], [...]], [...], [...])",
      IterableBase.iterableToShortString(l1));
}