LibTest/collection/SplayTreeMap/SplayTreeMap_class_A04_t02.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 SplayTreeMap([int compare(K key1, K key2),
/// bool isValidKey(potentialKey)])
/// If the [compare] function is omitted, the objects are assumed to be
/// [Comparable], and are compared using their [Comparable.compareTo] method.
/// Non-comparable objects (including [null]) will not work as keys in that case.
/// @description Checks that if [compare] method is specified then
/// [Comparable.compareTo] is ignored during the comparison in [SplayTreeMap].
/// @author iarkh@unipro.ru

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

int compare(var key1, var key2) {
  return -1;
}

class C implements Comparable{
  int value;
  C(this.value);

  int compareTo(Object other) {
    return this.value - (other as C).value;
  }
}

main() {
  SplayTreeMap map = new SplayTreeMap(compare);
  C c1 = new C(1);
  C c2 = new C(1);

  map[c1] = 1;
  Expect.isFalse(map.containsKey(c2));
}