blob: 7746c7671f763bdefe9d48922bfcc0bbddc3b8bf [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 interface HashSet<E>
/// HashSet({bool equals(E e1, E e2), int hashCode(E e),
/// bool isValidKey(potentialKey) })
/// If [isValidKey] is omitted, it defaults to testing if the object is an [E]
/// instance.
/// @description Checks that default [isValidKey] function checks if the object
/// is a [K] instance. This means that equals and hashCode functions will not be
/// called for instances of unsupported types.
/// @author
import "../../../Utils/expect.dart";
import "dart:collection";
int i = 0;
bool equals(dynamic key1, dynamic key2) {
return key1 == key2;
int hashCode(dynamic key) {
return key;
main() {
HashSet<int> set = new HashSet<int>(equals : equals, hashCode : hashCode);
set.addAll([0, 1, 2, -3, -4]);
i = 0;
bool j = set.contains(null);
Expect.equals(0, i);
j = set.contains("string");
Expect.equals(0, i);
Expect.equals(0, i);