| // 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.from(Iterable elements) |
| * All the [elements] should be assignable to [E]. [The elements] iterable |
| * itself may have any element type, so this constructor can be used to |
| * down-cast a [Set], for example as: |
| * Set<SuperType> superSet = ...; |
| * Set<SubType> subSet = |
| * new HashSet<SubType>.from(superSet.where((e) => e is SubType)); |
| * @description Checks that HashSet.from throws TypeError if [elements] |
| * contains element of incompatible type |
| * @author iarkh@unipro.ru |
| */ |
| import "../../../Utils/expect.dart"; |
| import "dart:collection"; |
| |
| main() { |
| Expect.throws(() { |
| new HashSet<int>.from(["testme", 1, 2, 3, null, "", [], [1, 2, 3], {}, |
| new Error(), -1, -2, "string1", "string2", "string3", 'a', 'b', 'c']); |
| }, (e) => e is TypeError || e is CastError |
| ); |
| } |
