// 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 SplayTreeSet([int compare(E key1, E key2),
/// bool isValidKey(potentialKey)])
/// ...
/// If the compare function is omitted, it defaults to Comparable.compare, and
/// the elements must be comparable.
/// @description Checks that if the compare function is omitted, it defaults to
/// Comparable.compare
/// @author sgrekhov@unipro.ru

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

main() {
  SplayTreeSet set = new SplayTreeSet();
  set.add(3);
  set.add(4);
  set.add(1);
  set.add(2);
  set.add(2.1);

  Expect.equals(1, set.elementAt(0));
  Expect.equals(2, set.elementAt(1));
  Expect.equals(2.1, set.elementAt(2));
  Expect.equals(3, set.elementAt(3));
  Expect.equals(4, set.elementAt(4));

  set = new SplayTreeSet();
  set.add("3");
  set.add("4");
  set.add("z");
  set.add("1");
  set.add("a");
  set.add("2");

  Expect.equals("1", set.elementAt(0));
  Expect.equals("2", set.elementAt(1));
  Expect.equals("3", set.elementAt(2));
  Expect.equals("4", set.elementAt(3));
  Expect.equals("a", set.elementAt(4));
  Expect.equals("z", set.elementAt(5));
}