test262/test/language/statements/for-of/set-expand-contract.js

28 lines
597 B
JavaScript

// Copyright (C) 2015 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: Set entry insertion and removal during traversal using for..of
info: >
New entries inserted into a Set instance during traversal should not be
visited if they are removed prior to visitation.
es6id: 13.6.4
features: [Set]
---*/
var set = new Set();
var iterationCount = 0;
set.add(0);
for (var x of set) {
assert.sameValue(x, 0);
set.add(1);
set.delete(1);
iterationCount += 1;
}
assert.sameValue(iterationCount, 1);