blob: 6962d4ddd308f925ca70f4e075b699a078b7fa57 [file] [log] [blame]
// 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.
/// @assertion SplayTreeMap([int compare(K key1, K key2),
/// bool isValidKey(potentialKey)])
/// Keys of the map are compared using the [compare] function passed in the
/// constructor, both for ordering and for equality.
/// @description Checks that [compare] function works as expected.
/// @author
import "dart:collection";
import "../../../Utils/expect.dart";
class C {
int value;
int compare(var key1, var key2) {
return key1.value - key2.value;
main() {
SplayTreeMap map = new SplayTreeMap(compare);
C c1 = new C(2);
C c2 = new C(1);
C c3 = new C(-1);
C c4 = new C(1);
map[c1] = 1;
map[c2] = 2;
map[c3] = 3;
map[c4] = 4;
Expect.equals(c3, map.firstKey());
Expect.equals(c1, map.lastKey());
Expect.equals(4, map[c2]);
Expect.equals(4, map[c4]);