| // Copyright (c) 2013, 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. |
| |
| import "package:expect/expect.dart"; |
| import "dart:collection"; |
| |
| void main() { |
| Set s = new HashSet(); |
| s.add(1); |
| Expect.equals("{1}", s.toString()); |
| s.remove(1); |
| s.add(s); |
| Expect.equals("{{...}}", s.toString()); |
| |
| Queue q = new ListQueue(4); |
| q.add(1); |
| q.add(2); |
| q.add(q); |
| q.add(s); |
| |
| Expect.equals("{1, 2, {...}, {{...}}}", q.toString()); |
| |
| // Throwing in the middle of a toString does not leave the |
| // set as being visited |
| q.addLast(new ThrowOnToString()); |
| Expect.throws(q.toString, (e) => e == "Bad!"); |
| q.removeLast(); |
| Expect.equals("{1, 2, {...}, {{...}}}", q.toString()); |
| } |
| |
| class ThrowOnToString { |
| |
| String toString() { |
| throw "Bad!"; |
| } |
| } |