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b101a7d002
Change-Id: Ib33169c3e0ffc870915c189404074a1dea472546 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196548 Reviewed-by: Bob Nystrom <rnystrom@google.com> Commit-Queue: Leaf Petersen <leafp@google.com>
39 lines
913 B
Dart
39 lines
913 B
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// @dart = 2.9
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import "package:expect/expect.dart";
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import "dart:collection";
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void main() {
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Set s = new HashSet();
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s.add(1);
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Expect.equals("{1}", s.toString());
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s.remove(1);
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s.add(s);
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Expect.equals("{{...}}", s.toString());
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Queue q = new ListQueue(4);
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q.add(1);
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q.add(2);
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q.add(q);
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q.add(s);
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Expect.equals("{1, 2, {...}, {{...}}}", q.toString());
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// Throwing in the middle of a toString does not leave the
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// set as being visited
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q.addLast(new ThrowOnToString());
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Expect.throws(q.toString, (e) => e == "Bad!");
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q.removeLast();
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Expect.equals("{1, 2, {...}, {{...}}}", q.toString());
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}
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class ThrowOnToString {
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String toString() {
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throw "Bad!";
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}
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}
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