| // 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. |
| |
| // @dart = 2.9 |
| |
| import "package:expect/expect.dart"; |
| |
| void main() { |
| Map m = new Map(); |
| |
| m[0] = 0; |
| m[1] = 1; |
| m[2] = m; |
| |
| Expect.equals('{0: 0, 1: 1, 2: {...}}', m.toString()); |
| |
| // Throwing in the middle of a toString does not leave the |
| // map as being visited |
| ThrowOnToString err = new ThrowOnToString(); |
| m[1] = err; |
| Expect.throws(m.toString, (e) => e == "Bad!"); |
| m[1] = 1; |
| Expect.equals('{0: 0, 1: 1, 2: {...}}', m.toString()); |
| m[err] = 1; |
| Expect.throws(m.toString, (e) => e == "Bad!"); |
| m.remove(err); |
| } |
| |
| class ThrowOnToString { |
| String toString() { |
| throw "Bad!"; |
| } |
| } |